Re: [Nfs-ganesha-devel] 2.7.3 with CEPH_FSAL Crashing

[David C <dcsysengineer@xxxxxxxxx>]

Hi All

Further to my previous messages, I upgraded to libcephfs2-14.2.2-0.el7.x86_64 as suggested and things certainly seem a lot more stable, I have had some crashes though, could someone assist in debugging this latest crash please? 

(gdb) bt
#0  0x00007fce4e9fc1bb in Client::fill_statx(Inode*, unsigned int, ceph_statx*) () from /lib64/libcephfs.so.2
#1  0x00007fce4ea1d4ca in Client::_readdir_cache_cb(dir_result_t*, int (*)(void*, dirent*, ceph_statx*, long, Inode*), void*, int, bool) () from /lib64/libcephfs.so.2
#2  0x00007fce4ea1e865 in Client::readdir_r_cb(dir_result_t*, int (*)(void*, dirent*, ceph_statx*, long, Inode*), void*, unsigned int, unsigned int, bool) () from /lib64/libcephfs.so.2
#3  0x00007fce4ea1f3dd in Client::readdirplus_r(dir_result_t*, dirent*, ceph_statx*, unsigned int, unsigned int, Inode**) () from /lib64/libcephfs.so.2
#4  0x00007fce4ece7b0e in fsal_ceph_readdirplus (dir=<optimized out>, cred=<optimized out>, out=0x7fccdbefa720, flags=0, want=1775, stx=0x7fccdbefa730, de=0x7fccdbefa8c0, dirp=<optimized out>, cmount=<optimized out>)
    at /usr/src/debug/nfs-ganesha-2.7.3/FSAL/FSAL_CEPH/statx_compat.h:314
#5  ceph_fsal_readdir (dir_pub=<optimized out>, whence=<optimized out>, dir_state=0x7fccdbefaa30, cb=0x522640 <mdc_readdir_uncached_cb>, attrmask=122830, eof=0x7fccdbefac0b) at /usr/src/debug/nfs-ganesha-2.7.3/FSAL/FSAL_CEPH/handle.c:211
#6  0x00000000005256e1 in mdcache_readdir_uncached (directory=directory@entry=0x7fcaa8bb84a0, whence=<optimized out>, dir_state=<optimized out>, cb=<optimized out>, attrmask=<optimized out>, eod_met=<optimized out>)
    at /usr/src/debug/nfs-ganesha-2.7.3/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:1654
#7  0x0000000000517a88 in mdcache_readdir (dir_hdl=0x7fcaa8bb84d8, whence=0x7fccdbefab18, dir_state=0x7fccdbefab30, cb=0x432db0 <populate_dirent>, attrmask=122830, eod_met=0x7fccdbefac0b) at /usr/src/debug/nfs-ganesha-2.7.3/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:551
#8  0x000000000043434a in fsal_readdir (directory=directory@entry=0x7fcaa8bb84d8, cookie=cookie@entry=0, nbfound=nbfound@entry=0x7fccdbefac0c, eod_met=eod_met@entry=0x7fccdbefac0b, attrmask=122830, cb=cb@entry=0x46f600 <nfs4_readdir_callback>, opaque=opaque@entry=0x7fccdbefac20)
    at /usr/src/debug/nfs-ganesha-2.7.3/FSAL/fsal_helper.c:1164
#9  0x00000000004705b9 in nfs4_op_readdir (op=0x7fcb7fed1f80, data="" resp=0x7fcb7d106c40) at /usr/src/debug/nfs-ganesha-2.7.3/Protocols/NFS/nfs4_op_readdir.c:664
#10 0x000000000045d120 in nfs4_Compound (arg=<optimized out>, req=<optimized out>, res=0x7fcb7e001000) at /usr/src/debug/nfs-ganesha-2.7.3/Protocols/NFS/nfs4_Compound.c:942
#11 0x00000000004512cd in nfs_rpc_process_request (reqdata=0x7fcb7e1d1950) at /usr/src/debug/nfs-ganesha-2.7.3/MainNFSD/nfs_worker_thread.c:1328
#12 0x0000000000450766 in nfs_rpc_decode_request (xprt=0x7fcaf17fb0e0, xdrs=0x7fcb7e1ddb90) at /usr/src/debug/nfs-ganesha-2.7.3/MainNFSD/nfs_rpc_dispatcher_thread.c:1345
#13 0x00007fce6165707d in svc_rqst_xprt_task (wpe=0x7fcaf17fb2f8) at /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/svc_rqst.c:769
#14 0x00007fce6165759a in svc_rqst_epoll_events (n_events=<optimized out>, sr_rec=0x56a24c0) at /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/svc_rqst.c:941
#15 svc_rqst_epoll_loop (sr_rec=<optimized out>) at /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/svc_rqst.c:1014
#16 svc_rqst_run_task (wpe=0x56a24c0) at /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/svc_rqst.c:1050
#17 0x00007fce6165f123 in work_pool_thread (arg=0x7fcd381c77b0) at /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/work_pool.c:181
#18 0x00007fce5fc17dd5 in start_thread () from /lib64/libpthread.so.0
#19 0x00007fce5ed8eead in clone () from /lib64/libc.so.6

Package versions:

nfs-ganesha-vfs-2.7.3-0.1.el7.x86_64
nfs-ganesha-debuginfo-2.7.3-0.1.el7.x86_64
nfs-ganesha-ceph-2.7.3-0.1.el7.x86_64
nfs-ganesha-2.7.3-0.1.el7.x86_64

libcephfs2-14.2.2-0.el7.x86_64

librados2-14.2.2-0.el7.x86_64

Ganesha export:

EXPORT
{
    Export_ID=100;
    Protocols = 4;
    Transports = TCP;
    Path = /;
    Pseudo = /ceph/;
    Access_Type = RW;
    Attr_Expiration_Time = 0;
    Disable_ACL = FALSE;
    Manage_Gids = TRUE;
    Filesystem_Id = 100.1;
    FSAL {
        Name = CEPH;
    }
}

Ceph.conf:

[client]
        mon host = --removed--
        client_oc_size = 6291456000 #6GB
        client_acl_type=posix_acl
        client_quota = true
        client_quota_df = true

Client mount options:

rw,relatime,vers=4.1,rsize=1048576,wsize=1048576,namlen=255,soft,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=removed,local_lock=none,addr=removed)

On Fri, Jul 19, 2019 at 5:47 PM David C <dcsysengineer@xxxxxxxxx> wrote:

Thanks, Jeff. I'll give 14.2.2 a go when it's released.

On Wed, 17 Jul 2019, 22:29 Jeff Layton, <jlayton@xxxxxxxxxxxxxxx> wrote:

Ahh, I just noticed you were running nautilus on the client side. This
patch went into v14.2.2, so once you update to that you should be good
to go.

-- Jeff

On Wed, 2019-07-17 at 17:10 -0400, Jeff Layton wrote:
> This is almost certainly the same bug that is fixed here:
>
> https://github.com/ceph/ceph/pull/28324
>
> It should get backported soon-ish but I'm not sure which luminous
> release it'll show up in.
>
> Cheers,
> Jeff
>
> On Wed, 2019-07-17 at 10:36 +0100, David C wrote:
> > Thanks for taking a look at this, Daniel. Below is the only interesting bit from the Ceph MDS log at the time of the crash but I suspect the slow requests are a result of the Ganesha crash rather than the cause of it. Copying the Ceph list in case anyone has any ideas.
> >
> > 2019-07-15 15:06:54.624007 7f5fda5bb700  0 log_channel(cluster) log [WRN] : 6 slow requests, 5 included below; oldest blocked for > 34.588509 secs
> > 2019-07-15 15:06:54.624017 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 33.113514 seconds old, received at 2019-07-15 15:06:21.510423: client_request(client.16140784:5571174 setattr mtime=2019-07-15 14:59:45.642408 #0x10009079cfb 2019-07
> > -15 14:59:45.642408 caller_uid=1161, caller_gid=1131{}) currently failed to xlock, waiting
> > 2019-07-15 15:06:54.624020 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 34.588509 seconds old, received at 2019-07-15 15:06:20.035428: client_request(client.16129440:1067288 create #0x1000907442e/filePathEditorRegistryPrefs.melDXAtss 201
> > 9-07-15 14:59:53.694087 caller_uid=1161, caller_gid=1131{1131,4121,2330,2683,4115,2322,2779,2979,1503,3511,2783,2707,2942,2980,2258,2829,1238,1237,2793,1235,1249,2097,1154,2982,2983,3860,4101,1208,3638,3641,3644,3640,3643,3639,3642,3822,3945,4045,3521,35
> > 22,3520,3523,}) currently failed to wrlock, waiting
> > 2019-07-15 15:06:54.624025 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 34.583918 seconds old, received at 2019-07-15 15:06:20.040019: client_request(client.16140784:5570551 getattr pAsLsXsFs #0x1000907443b 2019-07-15 14:59:44.171408 cal
> > ler_uid=1161, caller_gid=1131{}) currently failed to rdlock, waiting
> > 2019-07-15 15:06:54.624028 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 34.580632 seconds old, received at 2019-07-15 15:06:20.043305: client_request(client.16129440:1067293 unlink #0x1000907442e/filePathEditorRegistryPrefs.melcdzxxc 201
> > 9-07-15 14:59:53.701964 caller_uid=1161, caller_gid=1131{1131,4121,2330,2683,4115,2322,2779,2979,1503,3511,2783,2707,2942,2980,2258,2829,1238,1237,2793,1235,1249,2097,1154,2982,2983,3860,4101,1208,3638,3641,3644,3640,3643,3639,3642,3822,3945,4045,3521,35
> > 22,3520,3523,}) currently failed to wrlock, waiting
> > 2019-07-15 15:06:54.624032 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 34.538332 seconds old, received at 2019-07-15 15:06:20.085605: client_request(client.16129440:1067308 create #0x1000907442e/filePathEditorRegistryPrefs.melHHljMk 201
> > 9-07-15 14:59:53.744266 caller_uid=1161, caller_gid=1131{1131,4121,2330,2683,4115,2322,2779,2979,1503,3511,2783,2707,2942,2980,2258,2829,1238,1237,2793,1235,1249,2097,1154,2982,2983,3860,4101,1208,3638,3641,3644,3640,3643,3639,3642,3822,3945,4045,3521,3522,3520,3523,}) currently failed to wrlock, waiting
> > 2019-07-15 15:06:55.014073 7f5fdcdc0700  1 mds.mds01 Updating MDS map to version 68166 from mon.2
> > 2019-07-15 15:06:59.624041 7f5fda5bb700  0 log_channel(cluster) log [WRN] : 7 slow requests, 2 included below; oldest blocked for > 39.588571 secs
> > 2019-07-15 15:06:59.624048 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 30.495843 seconds old, received at 2019-07-15 15:06:29.128156: client_request(client.16129440:1072227 create #0x1000907442e/filePathEditorRegistryPrefs.mel58AQSv 2019-07-15 15:00:02.786754 caller_uid=1161, caller_gid=1131{1131,4121,2330,2683,4115,2322,2779,2979,1503,3511,2783,2707,2942,2980,2258,2829,1238,1237,2793,1235,1249,2097,1154,2982,2983,3860,4101,1208,3638,3641,3644,3640,3643,3639,3642,3822,3945,4045,3521,3522,3520,3523,}) currently failed to wrlock, waiting
> > 2019-07-15 15:06:59.624053 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 39.432848 seconds old, received at 2019-07-15 15:06:20.191151: client_request(client.16140784:5570649 mknod #0x1000907442e/filePathEditorRegistryPrefs.mel3HZLNE 2019-07-15 14:59:44.322408 caller_uid=1161, caller_gid=1131{}) currently failed to wrlock, waiting
> > 2019-07-15 15:07:03.014108 7f5fdcdc0700  1 mds.mds01 Updating MDS map to version 68167 from mon.2
> > 2019-07-15 15:07:04.624096 7f5fda5bb700  0 log_channel(cluster) log [WRN] : 8 slow requests, 1 included below; oldest blocked for > 44.588632 secs
> > 2019-07-15 15:07:04.624103 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 34.904077 seconds old, received at 2019-07-15 15:06:29.719983: client_request(client.16129440:1072228 getattr pAsLsXsFs #0x1000907443b 2019-07-15 15:00:03.378512 caller_uid=1161, caller_gid=1131{1131,4121,2330,2683,4115,2322,2779,2979,1503,3511,2783,2707,2942,2980,2258,2829,1238,1237,2793,1235,1249,2097,1154,2982,2983,3860,4101,1208,3638,3641,3644,3640,3643,3639,3642,3822,3945,4045,3521,3522,3520,3523,}) currently failed to rdlock, waiting
> > 2019-07-15 15:07:07.013972 7f5fdcdc0700  1 mds.mds01 Updating MDS map to version 68168 from mon.2
> > 2019-07-15 15:07:09.624166 7f5fda5bb700  0 log_channel(cluster) log [WRN] : 10 slow requests, 2 included below; oldest blocked for > 49.588693 secs
> > 2019-07-15 15:07:09.624173 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 32.689838 seconds old, received at 2019-07-15 15:06:36.934283: client_request(client.16129440:1072271 getattr pAsLsXsFs #0x1000907443b 2019-07-15 15:00:10.592734 caller_uid=1161, caller_gid=1131{1131,4121,2330,2683,4115,2322,2779,2979,1503,3511,2783,2707,2942,2980,2258,2829,1238,1237,2793,1235,1249,2097,1154,2982,2983,3860,4101,1208,3638,3641,3644,3640,3643,3639,3642,3822,3945,4045,3521,3522,3520,3523,}) currently failed to rdlock, waiting
> > 2019-07-15 15:07:09.624177 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 34.962719 seconds old, received at 2019-07-15 15:06:34.661402: client_request(client.16129440:1072256 getattr pAsLsXsFs #0x1000907443b 2019-07-15 15:00:08.319912 caller_uid=1161, caller_gid=1131{1131,4121,2330,2683,4115,2322,2779,2979,1503,3511,2783,2707,2942,2980,2258,2829,1238,1237,2793,1235,1249,2097,1154,2982,2983,3860,4101,1208,3638,3641,3644,3640,3643,3639,3642,3822,3945,4045,3521,3522,3520,3523,}) currently failed to rdlock, waiting
> > 2019-07-15 15:07:11.519928 7f5fdcdc0700  1 mds.mds01 Updating MDS map to version 68169 from mon.2
> > 2019-07-15 15:07:19.624272 7f5fda5bb700  0 log_channel(cluster) log [WRN] : 11 slow requests, 1 included below; oldest blocked for > 59.588812 secs
> > 2019-07-15 15:07:19.624278 7f5fda5bb700  0 log_channel(cluster) log [WRN] : slow request 32.164260 seconds old, received at 2019-07-15 15:06:47.459980: client_request(client.16129440:1072326 getattr pAsLsXsFs #0x1000907443b 2019-07-15 15:00:21.118372 caller_uid=1161, caller_gid=1131{1131,4121,2330,2683,4115,2322,2779,2979,1503,3511,2783,2707,2942,2980,2258,2829,1238,1237,2793,1235,1249,2097,1154,2982,2983,3860,4101,1208,3638,3641,3644,3640,3643,3639,3642,3822,3945,4045,3521,3522,3520,3523,}) currently failed to rdlock, waiting
> >
> >
> > On Tue, Jul 16, 2019 at 1:18 PM Daniel Gryniewicz <dang@xxxxxxxxxx> wrote:
> > > This is not one I've seen before, and a quick look at the code looks
> > > strange.  The only assert in that bit is asserting the parent is a
> > > directory, but the parent directory is not something that was passed in
> > > by Ganesha, but rather something that was looked up internally in
> > > libcephfs.  This is beyond my expertise, at this point.  Maybe some ceph
> > > logs would help?
> > >
> > > Daniel
> > >
> > > On 7/15/19 10:54 AM, David C wrote:
> > > > This list has been deprecated. Please subscribe to the new devel list at lists.nfs-ganesha.org.
> > > >
> > > >
> > > > Hi All
> > > >
> > > > I'm running 2.7.3 using the CEPH FSAL to export CephFS (Luminous), it
> > > > ran well for a few days and crashed. I have a coredump, could someone
> > > > assist me in debugging this please?
> > > >
> > > > (gdb) bt
> > > > #0  0x00007f04dcab6207 in raise () from /lib64/libc.so.6
> > > > #1  0x00007f04dcab78f8 in abort () from /lib64/libc.so.6
> > > > #2  0x00007f04d2a9d6c5 in ceph::__ceph_assert_fail(char const*, char
> > > > const*, int, char const*) () from /usr/lib64/ceph/libceph-common.so.0
> > > > #3  0x00007f04d2a9d844 in ceph::__ceph_assert_fail(ceph::assert_data
> > > > const&) () from /usr/lib64/ceph/libceph-common.so.0
> > > > #4  0x00007f04cc807f04 in Client::_lookup_name(Inode*, Inode*, UserPerm
> > > > const&) () from /lib64/libcephfs.so.2
> > > > #5  0x00007f04cc81c41f in Client::ll_lookup_inode(inodeno_t, UserPerm
> > > > const&, Inode**) () from /lib64/libcephfs.so.2
> > > > #6  0x00007f04ccadbf0e in create_handle (export_pub=0x1baff10,
> > > > desc=<optimized out>, pub_handle=0x7f0470fd4718,
> > > > attrs_out=0x7f0470fd4740) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/FSAL/FSAL_CEPH/export.c:256
> > > > #7  0x0000000000523895 in mdcache_locate_host (fh_desc=0x7f0470fd4920,
> > > > export=export@entry=0x1bafbf0, entry=entry@entry=0x7f0470fd48b8,
> > > > attrs_out=attrs_out@entry=0x0)
> > > >      at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c:1011
> > > > #8  0x000000000051d278 in mdcache_create_handle (exp_hdl=0x1bafbf0,
> > > > fh_desc=<optimized out>, handle=0x7f0470fd4900, attrs_out=0x0) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_handle.c:1578
> > > > #9  0x000000000046d404 in nfs4_mds_putfh
> > > > (data="" at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/Protocols/NFS/nfs4_op_putfh.c:211
> > > > #10 0x000000000046d8e8 in nfs4_op_putfh (op=0x7f03effaf1d0,
> > > > data="" resp=0x7f03ec1de1f0) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/Protocols/NFS/nfs4_op_putfh.c:281
> > > > #11 0x000000000045d120 in nfs4_Compound (arg=<optimized out>,
> > > > req=<optimized out>, res=0x7f03ec1de9d0) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/Protocols/NFS/nfs4_Compound.c:942
> > > > #12 0x00000000004512cd in nfs_rpc_process_request
> > > > (reqdata=0x7f03ee5ed4b0) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/MainNFSD/nfs_worker_thread.c:1328
> > > > #13 0x0000000000450766 in nfs_rpc_decode_request (xprt=0x7f02180c2320,
> > > > xdrs=0x7f03ec568ab0) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/MainNFSD/nfs_rpc_dispatcher_thread.c:1345
> > > > #14 0x00007f04df45d07d in svc_rqst_xprt_task (wpe=0x7f02180c2538) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/svc_rqst.c:769
> > > > #15 0x00007f04df45d59a in svc_rqst_epoll_events (n_events=<optimized
> > > > out>, sr_rec=0x4bb53e0) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/svc_rqst.c:941
> > > > #16 svc_rqst_epoll_loop (sr_rec=<optimized out>) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/svc_rqst.c:1014
> > > > #17 svc_rqst_run_task (wpe=0x4bb53e0) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/svc_rqst.c:1050
> > > > #18 0x00007f04df465123 in work_pool_thread (arg=0x7f044c0008c0) at
> > > > /usr/src/debug/nfs-ganesha-2.7.3/libntirpc/src/work_pool.c:181
> > > > #19 0x00007f04dda05dd5 in start_thread () from /lib64/libpthread.so.0
> > > > #20 0x00007f04dcb7dead in clone () from /lib64/libc.so.6
> > > >
> > > > Package versions:
> > > >
> > > > nfs-ganesha-2.7.3-0.1.el7.x86_64
> > > > nfs-ganesha-ceph-2.7.3-0.1.el7.x86_64
> > > > libcephfs2-14.2.1-0.el7.x86_64
> > > > librados2-14.2.1-0.el7.x86_64
> > > >
> > > > I notice in my Ceph log I have a bunch of slow requests around the time
> > > > it went down, I'm not sure if it's a symptom of Ganesha segfaulting or
> > > > if it was a contributing factor.
> > > >
> > > > Thanks,
> > > > David
> > > >
> > > >
> > > > _______________________________________________
> > > > Nfs-ganesha-devel mailing list
> > > > Nfs-ganesha-devel@xxxxxxxxxxxxxxxxxxxxx
> > > > https://lists.sourceforge.net/lists/listinfo/nfs-ganesha-devel
> > > >
> >
> > _______________________________________________
> > ceph-users mailing list
> > ceph-users@xxxxxxxxxxxxxx
> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
--
Jeff Layton <jlayton@xxxxxxxxxxxxxxx>

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