Re: [Xen-devel] [PATCH 0/2] libxl: fix handling of fd and timer registrations

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On Mon, Feb 02, 2015 at 05:00:34PM -0700, Jim Fehlig wrote:
> This small series fixes some assertions we occasionally see in the
> libxl driver when running libvirt-TCK.  The assertions were due to
> races between destroying per-domain libxl_ctx and receiving fd and
> timer callbacks associated with them.  The races are masked by
> setting DEBUG loglevel in libvirtd.conf, so often missed by
> automated test setups that want DEBUG loglevel.
> 
> Patch 1 actually fixes the assertions.  Patch2 fixes a stupid mistake.
> See the commit messages for details.
> 
> Jim Fehlig (2):
>   libxl: fix fd and timer event handling
>   libxl: Move setup of child processing code to driver initialization
> 
>  src/libxl/libxl_domain.c | 244 +----------------------------------------------
>  src/libxl/libxl_driver.c | 212 +++++++++++++++++++++++++++++++++++++++-
>  2 files changed, 212 insertions(+), 244 deletions(-)

Hi Jim,

I gave a try to those two patches with OpenStack. Assuming I haven't make any
mistake, it make things worse.

Environment:
  Ubuntu 14.04
  with Xen package install (xen 4.4)
  libvirt: master (47dd6c4)
  Installed OpenStack via DevStack

Test: ./run_tempest.sh tempest.api.compute

Result:
without the patches, the tests run fine, they all succeed.
with the patches, the tests fail AND libvirt became unresponsible.
  Running `virsh -c xen: list` does not return. (or any virsh command)

I have attach a backtrace, if that can help.

-- 
Anthony PERARD
Thread 30 (Thread 0x7fa9cad9f700 (LWP 5872)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa9a000d5e0 "instance-00000020") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa9a0007630, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa9a0007630, name=0x7fa9a000d5e0 "instance-00000020") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa9a0006770, args=0x7fa9a0000f90, rerr=0x7fa9cad9ec40, 
    client=0x7fa9d36470d0) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d36470d0, msg=<optimised out>, rerr=0x7fa9cad9ec40, args=0x7fa9a0000f90, ret=0x7fa9a0006770)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3645fb0, client=0x7fa9d36470d0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36470d0, msg=0x7fa9d3645fb0) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c5f0) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9cad9f700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 29 (Thread 0x7fa9ca59e700 (LWP 5873)):
#0  0x00007fa9cf91dcbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9cd452fff in ?? () from /usr/lib/libxenlight-4.4.so
#2  0x00007fa9cd45441b in ?? () from /usr/lib/libxenlight-4.4.so
#3  0x00007fa9cd438d27 in ?? () from /usr/lib/libxenlight-4.4.so
#4  0x00007fa9cd439228 in libxl_domain_create_new () from /usr/lib/libxenlight-4.4.so
#5  0x00007fa9c11846d8 in libxlDomainStart (driver=driver@entry=0x7fa9b818ff60, vm=vm@entry=0x7fa9b80f0770, start_paused=start_paused@entry=false, 
    restore_fd=restore_fd@entry=-1) at libxl/libxl_domain.c:1044
#6  0x00007fa9c1188134 in libxlDomainCreateWithFlags (dom=0x7fa9b0004440, flags=0) at libxl/libxl_driver.c:2587
#7  0x00007fa9cff8466d in virDomainCreateWithFlags (domain=domain@entry=0x7fa9b0004440, flags=0) at libvirt-domain.c:6898
#8  0x00007fa9d16ee4a8 in remoteDispatchDomainCreateWithFlags (server=<optimised out>, msg=<optimised out>, ret=0x7fa9b000a560, args=0x7fa9b00031d0, rerr=0x7fa9ca59dc40, 
    client=<optimised out>) at remote_dispatch.h:3252
#9  remoteDispatchDomainCreateWithFlagsHelper (server=<optimised out>, client=<optimised out>, msg=<optimised out>, rerr=0x7fa9ca59dc40, args=0x7fa9b00031d0, 
    ret=0x7fa9b000a560) at remote_dispatch.h:3229
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3644440, client=0x7fa9d36429b0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36429b0, msg=0x7fa9d3644440) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c490) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9ca59e700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 28 (Thread 0x7fa9c9d9d700 (LWP 5874)):
#0  0x00007fa9cf91dcbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9cd452fff in ?? () from /usr/lib/libxenlight-4.4.so
#2  0x00007fa9cd45441b in ?? () from /usr/lib/libxenlight-4.4.so
#3  0x00007fa9cd438d27 in ?? () from /usr/lib/libxenlight-4.4.so
#4  0x00007fa9c11842c9 in libxlDomainStart (driver=driver@entry=0x7fa9b818ff60, vm=vm@entry=0x7fa9b0001900, start_paused=start_paused@entry=false, restore_fd=89, 
    restore_fd@entry=-1) at libxl/libxl_domain.c:1049
#5  0x00007fa9c1188134 in libxlDomainCreateWithFlags (dom=0x7fa9b40034f0, flags=0) at libxl/libxl_driver.c:2587
#6  0x00007fa9cff8466d in virDomainCreateWithFlags (domain=domain@entry=0x7fa9b40034f0, flags=0) at libvirt-domain.c:6898
#7  0x00007fa9d16ee4a8 in remoteDispatchDomainCreateWithFlags (server=<optimised out>, msg=<optimised out>, ret=0x7fa9b4007930, args=0x7fa9b4004610, rerr=0x7fa9c9d9cc40, 
    client=<optimised out>) at remote_dispatch.h:3252
#8  remoteDispatchDomainCreateWithFlagsHelper (server=<optimised out>, client=<optimised out>, msg=<optimised out>, rerr=0x7fa9c9d9cc40, args=0x7fa9b4004610, 
    ret=0x7fa9b4007930) at remote_dispatch.h:3229
#9  0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3647270, client=0x7fa9d36429b0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#10 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36429b0, msg=0x7fa9d3647270) at rpc/virnetserverprogram.c:307
#11 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#12 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#13 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c330) at util/virthreadpool.c:144
#14 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#15 0x00007fa9cfc00182 in start_thread (arg=0x7fa9c9d9d700) at pthread_create.c:312
#16 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 27 (Thread 0x7fa9c959c700 (LWP 5875)):
#0  0x00007fa9cf91dcbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9cd452fff in ?? () from /usr/lib/libxenlight-4.4.so
#2  0x00007fa9cd45441b in ?? () from /usr/lib/libxenlight-4.4.so
#3  0x00007fa9cd438d27 in ?? () from /usr/lib/libxenlight-4.4.so
#4  0x00007fa9cd439228 in libxl_domain_create_new () from /usr/lib/libxenlight-4.4.so
#5  0x00007fa9c11846d8 in libxlDomainStart (driver=driver@entry=0x7fa9b818ff60, vm=vm@entry=0x7fa9b4003ec0, start_paused=start_paused@entry=false, 
    restore_fd=restore_fd@entry=-1) at libxl/libxl_domain.c:1044
#6  0x00007fa9c1188134 in libxlDomainCreateWithFlags (dom=0x7fa9a80038a0, flags=0) at libxl/libxl_driver.c:2587
#7  0x00007fa9cff8466d in virDomainCreateWithFlags (domain=domain@entry=0x7fa9a80038a0, flags=0) at libvirt-domain.c:6898
#8  0x00007fa9d16ee4a8 in remoteDispatchDomainCreateWithFlags (server=<optimised out>, msg=<optimised out>, ret=0x7fa9a8002430, args=0x7fa9a8004590, rerr=0x7fa9c959bc40, 
    client=<optimised out>) at remote_dispatch.h:3252
#9  remoteDispatchDomainCreateWithFlagsHelper (server=<optimised out>, client=<optimised out>, msg=<optimised out>, rerr=0x7fa9c959bc40, args=0x7fa9a8004590, 
    ret=0x7fa9a8002430) at remote_dispatch.h:3229
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d36447b0, client=0x7fa9d36429b0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36429b0, msg=0x7fa9d36447b0) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c490) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9c959c700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 26 (Thread 0x7fa9c8d9b700 (LWP 5876)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b0008e90) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b0008e90) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b0008e80) at util/virobject.c:323
#5  0x00007fa9cff0c418 in virDomainListPopulate (payload=0x7fa9b0008e80, name=<optimised out>, opaque=0x7fa9c8d9aa60) at conf/domain_conf.c:21474
#6  0x00007fa9cfe9fccc in virHashForEach (table=0x7fa9b81894b0, iter=iter@entry=0x7fa9cff0c3d0 <virDomainListPopulate>, data=data@entry=0x7fa9c8d9aa60) at util/virhash.c:521
#7  0x00007fa9cff20e32 in virDomainObjListExport (doms=0x7fa9b8189460, conn=<optimised out>, domains=0x7fa9c8d9ab40, filter=<optimised out>, flags=<optimised out>)
    at conf/domain_conf.c:21600
#8  0x00007fa9cff842b3 in virConnectListAllDomains (conn=0x7fa9b40009a0, domains=0x7fa9c8d9ab40, flags=3) at libvirt-domain.c:6794
#9  0x00007fa9d16e646f in remoteDispatchConnectListAllDomains (server=<optimised out>, msg=<optimised out>, ret=0x7fa9ac00f4e0, args=0x7fa9ac00c740, rerr=0x7fa9c8d9ac40, 
    client=0x7fa9d36429b0) at remote.c:1580
#10 remoteDispatchConnectListAllDomainsHelper (server=<optimised out>, client=0x7fa9d36429b0, msg=<optimised out>, rerr=0x7fa9c8d9ac40, args=0x7fa9ac00c740, 
    ret=0x7fa9ac00f4e0) at remote_dispatch.h:1072
#11 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3641aa0, client=0x7fa9d36429b0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#12 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36429b0, msg=0x7fa9d3641aa0) at rpc/virnetserverprogram.c:307
#13 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#14 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#15 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c5f0) at util/virthreadpool.c:144
#16 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#17 0x00007fa9cfc00182 in start_thread (arg=0x7fa9c8d9b700) at pthread_create.c:312
#18 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 25 (Thread 0x7fa9c859a700 (LWP 5877)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cff0caf0 in virDomainObjListAdd (doms=0x7fa9b8189460, def=def@entry=0x7fa9b81a3810, xmlopt=0x7fa9b81a5740, flags=flags@entry=0, 
    oldDef=oldDef@entry=0x7fa9c8599a40) at conf/domain_conf.c:2453
#6  0x00007fa9c1187e67 in libxlDomainDefineXMLFlags (conn=0x7fa9a0007630, 
    xml=0x7fa9b80eec00 "<domain type=\"xen\">\n  <uuid>0083e6c1-d8ca-4803-9c14-cca1317e2f1c</uuid>\n  <name>instance-00000024</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"..., flags=<optimised out>) at libxl/libxl_driver.c:2626
#7  0x00007fa9cff836b4 in virDomainDefineXML (conn=0x7fa9a0007630, 
    xml=0x7fa9b80eec00 "<domain type=\"xen\">\n  <uuid>0083e6c1-d8ca-4803-9c14-cca1317e2f1c</uuid>\n  <name>instance-00000024</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"...) at libvirt-domain.c:6464
#8  0x00007fa9d16fe8e2 in remoteDispatchDomainDefineXML (server=<optimised out>, msg=<optimised out>, ret=0x7fa9b81a0ab0, args=0x7fa9b8150180, rerr=0x7fa9c8599c40, 
    client=0x7fa9d36470d0) at remote_dispatch.h:3376
#9  remoteDispatchDomainDefineXMLHelper (server=<optimised out>, client=0x7fa9d36470d0, msg=<optimised out>, rerr=0x7fa9c8599c40, args=0x7fa9b8150180, ret=0x7fa9b81a0ab0)
    at remote_dispatch.h:3356
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3646120, client=0x7fa9d36470d0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36470d0, msg=0x7fa9d3646120) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c490) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9c859a700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 24 (Thread 0x7fa9c7d99700 (LWP 5878)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cff0bdf3 in virDomainObjListNumOfDomains (doms=0x7fa9b8189460, active=<optimised out>, filter=<optimised out>, conn=<optimised out>)
    at conf/domain_conf.c:20606
#6  0x00007fa9cff705be in virConnectNumOfDomains (conn=0x7fa9a0007630) at libvirt-domain.c:97
#7  0x00007fa9d16faf39 in remoteDispatchConnectNumOfDomains (server=<optimised out>, msg=<optimised out>, ret=0x7fa990000b10, rerr=0x7fa9c7d98c40, client=0x7fa9d36470d0)
    at remote_dispatch.h:2099
#8  remoteDispatchConnectNumOfDomainsHelper (server=<optimised out>, client=0x7fa9d36470d0, msg=<optimised out>, rerr=0x7fa9c7d98c40, args=<optimised out>, 
    ret=0x7fa990000b10) at remote_dispatch.h:2080
#9  0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d36437b0, client=0x7fa9d36470d0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#10 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36470d0, msg=0x7fa9d36437b0) at rpc/virnetserverprogram.c:307
#11 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#12 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#13 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c5f0) at util/virthreadpool.c:144
#14 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#15 0x00007fa9cfc00182 in start_thread (arg=0x7fa9c7d99700) at pthread_create.c:312
#16 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 23 (Thread 0x7fa9c7598700 (LWP 5879)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa99c0097e0 "instance-00000023") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa9a4000b40, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa9a4000b40, name=0x7fa99c0097e0 "instance-00000023") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa99c001a40, args=0x7fa99c0031d0, rerr=0x7fa9c7597c40, 
    client=0x7fa9d364eb40) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d364eb40, msg=<optimised out>, rerr=0x7fa9c7597c40, args=0x7fa99c0031d0, ret=0x7fa99c001a40)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3644020, client=0x7fa9d364eb40, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d364eb40, msg=0x7fa9d3644020) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c490) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9c7598700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 22 (Thread 0x7fa9c6d97700 (LWP 5880)):
#0  0x00007fa9cf91dcbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9cd452fff in ?? () from /usr/lib/libxenlight-4.4.so
#2  0x00007fa9cd45441b in ?? () from /usr/lib/libxenlight-4.4.so
#3  0x00007fa9cd42cc36 in libxl_domain_destroy () from /usr/lib/libxenlight-4.4.so
#4  0x00007fa9c118ac2f in libxlDomainDestroyFlags (dom=<optimised out>, flags=<optimised out>) at libxl/libxl_driver.c:1226
#5  0x00007fa9cff7157c in virDomainDestroy (domain=domain@entry=0x7fa998001b50) at libvirt-domain.c:481
#6  0x00007fa9d16fe7bc in remoteDispatchDomainDestroy (server=<optimised out>, msg=<optimised out>, args=<optimised out>, rerr=0x7fa9c6d96c40, client=0x7fa9d36429b0)
    at remote_dispatch.h:3479
#7  remoteDispatchDomainDestroyHelper (server=<optimised out>, client=0x7fa9d36429b0, msg=<optimised out>, rerr=0x7fa9c6d96c40, args=<optimised out>, ret=<optimised out>)
    at remote_dispatch.h:3457
#8  0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d36483a0, client=0x7fa9d36429b0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#9  virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36429b0, msg=0x7fa9d36483a0) at rpc/virnetserverprogram.c:307
#10 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#11 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#12 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c5f0) at util/virthreadpool.c:144
#13 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#14 0x00007fa9cfc00182 in start_thread (arg=0x7fa9c6d97700) at pthread_create.c:312
#15 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 21 (Thread 0x7fa9c6596700 (LWP 5881)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa9a40008e0 "instance-00000025") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa96c000b80, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa96c000b80, name=0x7fa9a40008e0 "instance-00000025") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa9a40011d0, args=0x7fa9a40099d0, rerr=0x7fa9c6595c40, 
    client=0x7fa9d36452c0) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d36452c0, msg=<optimised out>, rerr=0x7fa9c6595c40, args=0x7fa9a40099d0, ret=0x7fa9a40011d0)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3645250, client=0x7fa9d36452c0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36452c0, msg=0x7fa9d3645250) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361c490) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9c6596700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 20 (Thread 0x7fa9d1693700 (LWP 23669)):
#0  0x00007fa9cfc073bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9cbe4280d in ?? () from /usr/lib/libxenstore.so.3.0
#2  0x00007fa9cbe428bc in ?? () from /usr/lib/libxenstore.so.3.0
#3  0x00007fa9cbe42bc1 in ?? () from /usr/lib/libxenstore.so.3.0
#4  0x00007fa9cfc00182 in start_thread (arg=0x7fa9d1693700) at pthread_create.c:312
#5  0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 19 (Thread 0x7fa9d168a700 (LWP 23712)):
#0  0x00007fa9cfc073bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9cbe4280d in ?? () from /usr/lib/libxenstore.so.3.0
#2  0x00007fa9cbe428bc in ?? () from /usr/lib/libxenstore.so.3.0
#3  0x00007fa9cbe42bc1 in ?? () from /usr/lib/libxenstore.so.3.0
#4  0x00007fa9cfc00182 in start_thread (arg=0x7fa9d168a700) at pthread_create.c:312
#5  0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 18 (Thread 0x7fa9d166f700 (LWP 24994)):
#0  0x00007fa9cfc073bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9cbe4280d in ?? () from /usr/lib/libxenstore.so.3.0
#2  0x00007fa9cbe428bc in ?? () from /usr/lib/libxenstore.so.3.0
#3  0x00007fa9cbe42bc1 in ?? () from /usr/lib/libxenstore.so.3.0
#4  0x00007fa9cfc00182 in start_thread (arg=0x7fa9d166f700) at pthread_create.c:312
#5  0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 17 (Thread 0x7fa9d165c700 (LWP 27073)):
#0  0x00007fa9cfc073bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9cbe4280d in ?? () from /usr/lib/libxenstore.so.3.0
#2  0x00007fa9cbe428bc in ?? () from /usr/lib/libxenstore.so.3.0
#3  0x00007fa9cbe42bc1 in ?? () from /usr/lib/libxenstore.so.3.0
#4  0x00007fa9cfc00182 in start_thread (arg=0x7fa9d165c700) at pthread_create.c:312
#5  0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 16 (Thread 0x7fa9bfb9f700 (LWP 28515)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa980001a10 "instance-00000023") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa9a0007630, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa9a0007630, name=0x7fa980001a10 "instance-00000023") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa980000ed0, args=0x7fa980001a30, rerr=0x7fa9bfb9ec40, 
    client=0x7fa9d36470d0) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d36470d0, msg=<optimised out>, rerr=0x7fa9bfb9ec40, args=0x7fa980001a30, ret=0x7fa980000ed0)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3644820, client=0x7fa9d36470d0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36470d0, msg=0x7fa9d3644820) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361e380) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9bfb9f700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 15 (Thread 0x7fa9bf39e700 (LWP 28518)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa97c000b90 "instance-0000001f") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa9a0007630, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa9a0007630, name=0x7fa97c000b90 "instance-0000001f") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa97c000ac0, args=0x7fa97c000b70, rerr=0x7fa9bf39dc40, 
    client=0x7fa9d36470d0) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d36470d0, msg=<optimised out>, rerr=0x7fa9bf39dc40, args=0x7fa97c000b70, ret=0x7fa97c000ac0)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d364f440, client=0x7fa9d36470d0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36470d0, msg=0x7fa9d364f440) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3647250) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9bf39e700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 14 (Thread 0x7fa9beb9d700 (LWP 28610)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa984001ba0 "instance-00000024") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa9a4000b40, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa9a4000b40, name=0x7fa984001ba0 "instance-00000024") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa984000b10, args=0x7fa984001b80, rerr=0x7fa9beb9cc40, 
    client=0x7fa9d364eb40) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d364eb40, msg=<optimised out>, rerr=0x7fa9beb9cc40, args=0x7fa984001b80, ret=0x7fa984000b10)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3643700, client=0x7fa9d364eb40, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d364eb40, msg=0x7fa9d3643700) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3619740) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9beb9d700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 13 (Thread 0x7fa9be39c700 (LWP 29578)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa994000ac0 "instance-0000001f") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa9a4000b40, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa9a4000b40, name=0x7fa994000ac0 "instance-0000001f") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa994000a70, args=0x7fa994000aa0, rerr=0x7fa9be39bc40, 
    client=0x7fa9d364eb40) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d364eb40, msg=<optimised out>, rerr=0x7fa9be39bc40, args=0x7fa994000aa0, ret=0x7fa994000a70)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d36492c0, client=0x7fa9d364eb40, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d364eb40, msg=0x7fa9d36492c0) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3620d80) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9be39c700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 12 (Thread 0x7fa9bdb9b700 (LWP 29584)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa9740008c0 "instance-00000020") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa9a4000b40, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa9a4000b40, name=0x7fa9740008c0 "instance-00000020") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa974000960, args=0x7fa9740008e0, rerr=0x7fa9bdb9ac40, 
    client=0x7fa9d364eb40) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d364eb40, msg=<optimised out>, rerr=0x7fa9bdb9ac40, args=0x7fa9740008e0, ret=0x7fa974000960)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d36440c0, client=0x7fa9d364eb40, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d364eb40, msg=0x7fa9d36440c0) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3620440) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9bdb9b700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 11 (Thread 0x7fa9bd39a700 (LWP 29585)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cff0bdf3 in virDomainObjListNumOfDomains (doms=0x7fa9b8189460, active=<optimised out>, filter=<optimised out>, conn=<optimised out>)
    at conf/domain_conf.c:20606
#6  0x00007fa9cff705be in virConnectNumOfDomains (conn=0x7fa9a4000b40) at libvirt-domain.c:97
#7  0x00007fa9d16faf39 in remoteDispatchConnectNumOfDomains (server=<optimised out>, msg=<optimised out>, ret=0x7fa9680008e0, rerr=0x7fa9bd399c40, client=0x7fa9d364eb40)
    at remote_dispatch.h:2099
#8  remoteDispatchConnectNumOfDomainsHelper (server=<optimised out>, client=0x7fa9d364eb40, msg=<optimised out>, rerr=0x7fa9bd399c40, args=<optimised out>, 
    ret=0x7fa9680008e0) at remote_dispatch.h:2080
#9  0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3648f60, client=0x7fa9d364eb40, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#10 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d364eb40, msg=0x7fa9d3648f60) at rpc/virnetserverprogram.c:307
#11 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#12 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#13 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3612030) at util/virthreadpool.c:144
#14 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#15 0x00007fa9cfc00182 in start_thread (arg=0x7fa9bd39a700) at pthread_create.c:312
#16 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 10 (Thread 0x7fa9bcb99700 (LWP 29586)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa96c0008e0 "instance-0000001f") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa96c000b80, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa96c000b80, name=0x7fa96c0008e0 "instance-0000001f") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa96c003240, args=0x7fa96c0008c0, rerr=0x7fa9bcb98c40, 
    client=0x7fa9d36452c0) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d36452c0, msg=<optimised out>, rerr=0x7fa9bcb98c40, args=0x7fa96c0008c0, ret=0x7fa96c003240)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3645530, client=0x7fa9d36452c0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36452c0, msg=0x7fa9d3645530) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3613b20) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9bcb99700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7fa967fff700 (LWP 29668)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa9600008e0 "instance-00000024") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa96c000b80, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa96c000b80, name=0x7fa9600008e0 "instance-00000024") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa960000b80, args=0x7fa9600008c0, rerr=0x7fa967ffec40, 
    client=0x7fa9d36452c0) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d36452c0, msg=<optimised out>, rerr=0x7fa967ffec40, args=0x7fa9600008c0, ret=0x7fa960000b80)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d36455a0, client=0x7fa9d36452c0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36452c0, msg=0x7fa9d36455a0) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3619b80) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa967fff700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7fa9677fe700 (LWP 29744)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cff0caf0 in virDomainObjListAdd (doms=0x7fa9b8189460, def=def@entry=0x7fa95800a930, xmlopt=0x7fa9b81a5740, flags=flags@entry=0, 
    oldDef=oldDef@entry=0x7fa9677fda40) at conf/domain_conf.c:2453
#6  0x00007fa9c1187e67 in libxlDomainDefineXMLFlags (conn=0x7fa96c000b80, 
    xml=0x7fa958000990 "<domain type=\"xen\">\n  <uuid>0ef9e67d-eb9a-48e4-b773-ead7f0167009</uuid>\n  <name>instance-00000028</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"..., flags=<optimised out>) at libxl/libxl_driver.c:2626
#7  0x00007fa9cff836b4 in virDomainDefineXML (conn=0x7fa96c000b80, 
    xml=0x7fa958000990 "<domain type=\"xen\">\n  <uuid>0ef9e67d-eb9a-48e4-b773-ead7f0167009</uuid>\n  <name>instance-00000028</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"...) at libvirt-domain.c:6464
#8  0x00007fa9d16fe8e2 in remoteDispatchDomainDefineXML (server=<optimised out>, msg=<optimised out>, ret=0x7fa958000960, args=0x7fa9580008e0, rerr=0x7fa9677fdc40, 
    client=0x7fa9d36452c0) at remote_dispatch.h:3376
#9  remoteDispatchDomainDefineXMLHelper (server=<optimised out>, client=0x7fa9d36452c0, msg=<optimised out>, rerr=0x7fa9677fdc40, args=0x7fa9580008e0, ret=0x7fa958000960)
    at remote_dispatch.h:3356
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3651080, client=0x7fa9d36452c0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36452c0, msg=0x7fa9d3651080) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3619060) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9677fe700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7fa966ffd700 (LWP 29848)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cff0caf0 in virDomainObjListAdd (doms=0x7fa9b8189460, def=def@entry=0x7fa95c00a930, xmlopt=0x7fa9b81a5740, flags=flags@entry=0, 
    oldDef=oldDef@entry=0x7fa966ffca40) at conf/domain_conf.c:2453
#6  0x00007fa9c1187e67 in libxlDomainDefineXMLFlags (conn=0x7fa96c000b80, 
    xml=0x7fa95c000990 "<domain type=\"xen\">\n  <uuid>d64983a4-b85c-4793-a526-7b451517c55b</uuid>\n  <name>instance-00000026</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"..., flags=<optimised out>) at libxl/libxl_driver.c:2626
#7  0x00007fa9cff836b4 in virDomainDefineXML (conn=0x7fa96c000b80, 
    xml=0x7fa95c000990 "<domain type=\"xen\">\n  <uuid>d64983a4-b85c-4793-a526-7b451517c55b</uuid>\n  <name>instance-00000026</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"...) at libvirt-domain.c:6464
#8  0x00007fa9d16fe8e2 in remoteDispatchDomainDefineXML (server=<optimised out>, msg=<optimised out>, ret=0x7fa95c000960, args=0x7fa95c0008e0, rerr=0x7fa966ffcc40, 
    client=0x7fa9d36452c0) at remote_dispatch.h:3376
#9  remoteDispatchDomainDefineXMLHelper (server=<optimised out>, client=0x7fa9d36452c0, msg=<optimised out>, rerr=0x7fa966ffcc40, args=0x7fa95c0008e0, ret=0x7fa95c000960)
    at remote_dispatch.h:3356
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3648fd0, client=0x7fa9d36452c0, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d36452c0, msg=0x7fa9d3648fd0) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d361b550) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa966ffd700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7fa9667fc700 (LWP 30108)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cff0caf0 in virDomainObjListAdd (doms=0x7fa9b8189460, def=def@entry=0x7fa95000ad40, xmlopt=0x7fa9b81a5740, flags=flags@entry=0, 
    oldDef=oldDef@entry=0x7fa9667fba40) at conf/domain_conf.c:2453
#6  0x00007fa9c1187e67 in libxlDomainDefineXMLFlags (conn=0x7fa950000b80, 
    xml=0x7fa950000e90 "<domain type=\"xen\">\n  <uuid>3c260037-874b-4ec8-8704-05cf2fe9ee98</uuid>\n  <name>instance-00000029</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"..., flags=<optimised out>) at libxl/libxl_driver.c:2626
#7  0x00007fa9cff836b4 in virDomainDefineXML (conn=0x7fa950000b80, 
    xml=0x7fa950000e90 "<domain type=\"xen\">\n  <uuid>3c260037-874b-4ec8-8704-05cf2fe9ee98</uuid>\n  <name>instance-00000029</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"...) at libvirt-domain.c:6464
#8  0x00007fa9d16fe8e2 in remoteDispatchDomainDefineXML (server=<optimised out>, msg=<optimised out>, ret=0x7fa950003240, args=0x7fa9500008e0, rerr=0x7fa9667fbc40, 
    client=0x7fa9d3652320) at remote_dispatch.h:3376
#9  remoteDispatchDomainDefineXMLHelper (server=<optimised out>, client=0x7fa9d3652320, msg=<optimised out>, rerr=0x7fa9667fbc40, args=0x7fa9500008e0, ret=0x7fa950003240)
    at remote_dispatch.h:3356
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3652780, client=0x7fa9d3652320, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d3652320, msg=0x7fa9d3652780) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3622cb0) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9667fc700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7fa965ffb700 (LWP 30109)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cff0caf0 in virDomainObjListAdd (doms=0x7fa9b8189460, def=def@entry=0x7fa95400ab40, xmlopt=0x7fa9b81a5740, flags=flags@entry=0, 
    oldDef=oldDef@entry=0x7fa965ffaa40) at conf/domain_conf.c:2453
#6  0x00007fa9c1187e67 in libxlDomainDefineXMLFlags (conn=0x7fa950000b80, 
    xml=0x7fa954000db0 "<domain type=\"xen\">\n  <uuid>6207e6ef-543d-49bb-a06e-60fcbee4652e</uuid>\n  <name>instance-00000027</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"..., flags=<optimised out>) at libxl/libxl_driver.c:2626
#7  0x00007fa9cff836b4 in virDomainDefineXML (conn=0x7fa950000b80, 
    xml=0x7fa954000db0 "<domain type=\"xen\">\n  <uuid>6207e6ef-543d-49bb-a06e-60fcbee4652e</uuid>\n  <name>instance-00000027</name>\n  <memory>65536</memory>\n  <vcpu cpuset=\"0-7\">1</vcpu>\n  <metadata>\n    <nova:instance xmlns:no"...) at libvirt-domain.c:6464
#8  0x00007fa9d16fe8e2 in remoteDispatchDomainDefineXML (server=<optimised out>, msg=<optimised out>, ret=0x7fa954000d80, args=0x7fa9540008e0, rerr=0x7fa965ffac40, 
    client=0x7fa9d3652320) at remote_dispatch.h:3376
#9  remoteDispatchDomainDefineXMLHelper (server=<optimised out>, client=0x7fa9d3652320, msg=<optimised out>, rerr=0x7fa965ffac40, args=0x7fa9540008e0, ret=0x7fa954000d80)
    at remote_dispatch.h:3356
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3645430, client=0x7fa9d3652320, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d3652320, msg=0x7fa9d3645430) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3624110) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa965ffb700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fa9657fa700 (LWP 30110)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa9480008c0 "instance-00000028") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa950000b80, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa950000b80, name=0x7fa9480008c0 "instance-00000028") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa948000d80, args=0x7fa9480008e0, rerr=0x7fa9657f9c40, 
    client=0x7fa9d3652320) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d3652320, msg=<optimised out>, rerr=0x7fa9657f9c40, args=0x7fa9480008e0, ret=0x7fa948000d80)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3652550, client=0x7fa9d3652320, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d3652320, msg=0x7fa9d3652550) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d36178b0) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa9657fa700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fa964ff9700 (LWP 30111)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cfef8001 in virDomainObjListFindByName (doms=0x7fa9b8189460, name=0x7fa94c0008c0 "instance-00000026") at conf/domain_conf.c:1114
#6  0x00007fa9c118b786 in libxlDomainLookupByName (conn=0x7fa950000b80, name=<optimised out>) at libxl/libxl_driver.c:954
#7  0x00007fa9cff71356 in virDomainLookupByName (conn=0x7fa950000b80, name=0x7fa94c0008c0 "instance-00000026") at libvirt-domain.c:427
#8  0x00007fa9d16fd492 in remoteDispatchDomainLookupByName (server=<optimised out>, msg=<optimised out>, ret=0x7fa94c000960, args=0x7fa94c0008e0, rerr=0x7fa964ff8c40, 
    client=0x7fa9d3652320) at remote_dispatch.h:5429
#9  remoteDispatchDomainLookupByNameHelper (server=<optimised out>, client=0x7fa9d3652320, msg=<optimised out>, rerr=0x7fa964ff8c40, args=0x7fa94c0008e0, ret=0x7fa94c000960)
    at remote_dispatch.h:5409
#10 0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d3653e10, client=0x7fa9d3652320, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#11 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d3652320, msg=0x7fa9d3653e10) at rpc/virnetserverprogram.c:307
#12 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#13 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#14 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3613910) at util/virthreadpool.c:144
#15 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#16 0x00007fa9cfc00182 in start_thread (arg=0x7fa964ff9700) at pthread_create.c:312
#17 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fa947fff700 (LWP 30112)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007fa9cfc02657 in _L_lock_909 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fa9cfc02480 in __GI___pthread_mutex_lock (mutex=0x7fa9b8189470) at ../nptl/pthread_mutex_lock.c:79
#3  0x00007fa9cfeda44d in virMutexLock (m=m@entry=0x7fa9b8189470) at util/virthread.c:88
#4  0x00007fa9cfec172e in virObjectLock (anyobj=anyobj@entry=0x7fa9b8189460) at util/virobject.c:323
#5  0x00007fa9cff0bdf3 in virDomainObjListNumOfDomains (doms=0x7fa9b8189460, active=<optimised out>, filter=<optimised out>, conn=<optimised out>)
    at conf/domain_conf.c:20606
#6  0x00007fa9cff705be in virConnectNumOfDomains (conn=0x7fa950000b80) at libvirt-domain.c:97
#7  0x00007fa9d16faf39 in remoteDispatchConnectNumOfDomains (server=<optimised out>, msg=<optimised out>, ret=0x7fa9400008e0, rerr=0x7fa947ffec40, client=0x7fa9d3652320)
    at remote_dispatch.h:2099
#8  remoteDispatchConnectNumOfDomainsHelper (server=<optimised out>, client=0x7fa9d3652320, msg=<optimised out>, rerr=0x7fa947ffec40, args=<optimised out>, 
    ret=0x7fa9400008e0) at remote_dispatch.h:2080
#9  0x00007fa9d1717992 in virNetServerProgramDispatchCall (msg=0x7fa9d36451e0, client=0x7fa9d3652320, server=0x7fa9d362b2f0, prog=0x7fa9d363ee90)
    at rpc/virnetserverprogram.c:437
#10 virNetServerProgramDispatch (prog=0x7fa9d363ee90, server=server@entry=0x7fa9d362b2f0, client=0x7fa9d3652320, msg=0x7fa9d36451e0) at rpc/virnetserverprogram.c:307
#11 0x00007fa9d17119ed in virNetServerProcessMsg (msg=<optimised out>, prog=<optimised out>, client=<optimised out>, srv=0x7fa9d362b2f0) at rpc/virnetserver.c:172
#12 virNetServerHandleJob (jobOpaque=<optimised out>, opaque=0x7fa9d362b2f0) at rpc/virnetserver.c:193
#13 0x00007fa9cfedad25 in virThreadPoolWorker (opaque=opaque@entry=0x7fa9d3623290) at util/virthreadpool.c:144
#14 0x00007fa9cfeda21e in virThreadHelper (data=<optimised out>) at util/virthread.c:197
#15 0x00007fa9cfc00182 in start_thread (arg=0x7fa947fff700) at pthread_create.c:312
#16 0x00007fa9cf92b00d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fa9d169c8c0 (LWP 5871)):
#0  0x00007fa9cf91dcbd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fa9cfe97b9a in poll (__timeout=-1, __nfds=10, __fds=<optimised out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
#2  virEventPollRunOnce () at util/vireventpoll.c:641
#3  0x00007fa9cfe965c2 in virEventRunDefaultImpl () at util/virevent.c:308
#4  0x00007fa9d1712fed in virNetServerRun (srv=0x7fa9d362b2f0) at rpc/virnetserver.c:1139
#5  0x00007fa9d16d9bdd in main (argc=<optimised out>, argv=<optimised out>) at libvirtd.c:1486
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