Re: [389-users] Crash with segmentation fault after a database reinitialization

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On 02/05/2010 08:32 AM, Francesco Fiore wrote:


Francesco Fiore wrote:


Rich Megginson wrote:
Francesco Fiore wrote:
  
Hi,
I've two directory server in multimaster configuration. I've to 
reinitialize all databases on 2 nd server (B) using the data of the 1st (A).
After the synchronization, server B crash with an segmentation fault. 
There isn't any relevant message in the error log.
If I restart the directory server B, I've the same error.
The directory server version is 1.1.3 on Redhat5.
  
    
rpm -qi fedora-ds-base

32-bit or 64-bit?

We have fixed quite a few replication bugs since 1.1.3, including a 
couple of crashes.  I recommend upgrading to the latest.
  
# rpm -qi 389-ds-base
Name        : 389-ds-base                  Relocations: (not relocatable)
Version     : 1.2.4                             Vendor: Fedora Project
Release     : 1.el5                         Build Date: Tue 03 Nov 2009 04:47:39 PM CET
Install Date: Fri 05 Feb 2010 11:49:11 AM CET      Build Host: x86-6.fedora.phx.redhat.com
Group       : System Environment/Daemons    Source RPM: 389-ds-base-1.2.4-1.el5.src.rpm
Size        : 5339258                          License: GPLv2 with exceptions
Signature   : DSA/SHA1, Fri 06 Nov 2009 05:17:38 PM CET, Key ID 119cc036217521f6
Packager    : Fedora Project
URL         : http://port389.org/
Summary     : 389 Directory Server (base)
Description :

x86-64

I updated to the last stable version but I've the same error.
I traced the running process and I discovered that the segmentation fault is probably caused by futex system call. I attach the tail of the output of the strace command below.

getpeername(6, 0x7fff8256e3a0, [1475252821577171056]) = -1 ENOTCONN (Transport endpoint is not connected)
poll([{fd=42, events=POLLIN}, {fd=-1}, {fd=6, events=POLLIN}, {fd=-1}, {fd=65, events=POLLIN}], 5, 250) = 1 ([{fd=65, revents=POLLIN}])
futex(0x145f806c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x145f8068, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x145d0850, FUTEX_WAKE_PRIVATE, 1) = 1
getpeername(6, 0x7fff8256e3a0, [1475252821577171056]) = -1 ENOTCONN (Transport endpoint is not connected)
poll([{fd=42, events=POLLIN}, {fd=-1}, {fd=6, events=POLLIN}, {fd=-1}], 4, 250) = 1 ([{fd=42, revents=POLLIN}])
read(42, "\0", 200)                     = 1
getpeername(6, 0x7fff8256e3a0, [1475252821577171056]) = -1 ENOTCONN (Transport endpoint is not connected)
poll([{fd=42, events=POLLIN}, {fd=-1}, {fd=6, events=POLLIN}, {fd=-1}, {fd=64, events=POLLIN}], 5, 250) = 1 ([{fd=64, revents=POLLIN}])
futex(0x145f806c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x145f8068, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x14550730, FUTEX_WAKE_PRIVATE, 1 <unavailable ...>
getpeername(6, 0x7fff8256e3a0, [1475252821577171056]) = -1 ENOTCONN (Transport endpoint is not connected)
poll([{fd=42, events=POLLIN}, {fd=-1}, {fd=6, events=POLLIN}, {fd=-1}, {fd=65, events=POLLIN}], 5, 250) = 1 ([{fd=65, revents=POLLIN}])
futex(0x145f806c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x145f8068, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x145d0850, FUTEX_WAKE_PRIVATE, 1) = 1
getpeername(6, 0x7fff8256e3a0, [1475252821577171056]) = -1 ENOTCONN (Transport endpoint is not connected)
poll([{fd=42, events=POLLIN}, {fd=-1}, {fd=6, events=POLLIN}, {fd=-1}], 4, 250) = 1 ([{fd=42, revents=POLLIN}])
read(42, "\0", 200)                     = 1
getpeername(6, 0x7fff8256e3a0, [1475252821577171056]) = -1 ENOTCONN (Transport endpoint is not connected)
poll([{fd=42, events=POLLIN}, {fd=-1}, {fd=6, events=POLLIN}, {fd=-1}, {fd=64, events=POLLIN}], 5, 250) = 1 ([{fd=64, revents=POLLIN}])
futex(0x145f806c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x145f8068, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x14550730, FUTEX_WAKE_PRIVATE, 1 <unavailable ...>

I debugged the running process and gdb printed this stacktrace after the segmentation fault:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x63b2b940 (LWP 31976)]
0x000000364fa79140 in strcmp () from /lib64/libc.so.6
(gdb) bt
#0  0x000000364fa79140 in strcmp () from /lib64/libc.so.6
#1  0x00002b188041e4fc in ?? () from
/usr/lib64/dirsrv/plugins/libback-ldbm.so
#2  0x00002b188041d8d9 in add_hash () from
/usr/lib64/dirsrv/plugins/libback-ldbm.so
#3  0x00002b188041df27 in ?? () from
/usr/lib64/dirsrv/plugins/libback-ldbm.so
#4  0x00002b188042c273 in id2entry () from
/usr/lib64/dirsrv/plugins/libback-ldbm.so
#5  0x00002b18804594c0 in uniqueid2entry () from
/usr/lib64/dirsrv/plugins/libback-ldbm.so
#6  0x00002b188042b961 in ?? () from
/usr/lib64/dirsrv/plugins/libback-ldbm.so
#7  0x00002b18804445fc in ldbm_back_delete () from
/usr/lib64/dirsrv/plugins/libback-ldbm.so
#8  0x00002b187c4990d4 in ?? () from /usr/lib64/dirsrv/libslapd.so.0
#9  0x00002b187c499413 in do_delete () from /usr/lib64/dirsrv/libslapd.so.0
#10 0x0000000000412e79 in sasl_map_config_add ()
#11 0x0000003590827fad in ?? () from /usr/lib64/libnspr4.so
#12 0x00000036506064a7 in start_thread () from /lib64/libpthread.so.0
#13 0x000000364fad3c2d in clone () from /lib64/libc.so.6
  
I hope that these information can be useful.
The stacktrace is really useful.  Thanks!  If possible, could you install the debuginfo package and take the stacktrace?
yum install 389-ds-base-debuginfo
--noriko

I attach the tails of the error log and the /var/log/messages log.

[03/Feb/2010:19:20:53 +0100] - import Addressbook2: Workers finished; 
cleaning up...
[03/Feb/2010:19:21:13 +0100] - import Addressbook1: Workers finished; 
cleaning up...
[03/Feb/2010:19:21:13 +0100] - import Addressbook2: Workers cleaned up.
[03/Feb/2010:19:21:13 +0100] - import Addressbook2: Indexing complete.  
Post-processing...
[03/Feb/2010:19:21:13 +0100] - import Addressbook1: Workers cleaned up.
[03/Feb/2010:19:21:13 +0100] - import Addressbook1: Indexing complete.  
Post-processing...
[03/Feb/2010:19:21:50 +0100] - import Addressbook2: Flushing caches...
[03/Feb/2010:19:22:27 +0100] - import Addressbook1: Flushing caches...
[03/Feb/2010:19:22:27 +0100] - import Addressbook2: Closing files...
[03/Feb/2010:19:22:27 +0100] - import Addressbook1: Closing files...
[03/Feb/2010:19:32:27 +0100] - import Addressbook2: Import complete.  
Processed 3820687 entries in 4957 seconds. (770.77 entries/sec)
[03/Feb/2010:19:32:28 +0100] NSMMReplicationPlugin - 
multimaster_be_state_change: replica o=addressbook2 is coming online; 
enabling replication
[03/Feb/2010:19:32:29 +0100] - import Addressbook1: Import complete.  
Processed 3820339 entries in 4960 seconds. (770.23 entries/sec)
[03/Feb/2010:19:32:29 +0100] NSMMReplicationPlugin - 
multimaster_be_state_change: replica o=addressbook1 is coming online; 
enabling replication
[03/Feb/2010:19:32:29 +0100] NSMMReplicationPlugin - replica_reload_ruv: 
Warning: new data for replica o=addressbook1 does not match the data in 
the changelog.
 Recreating the changelog file. This could affect replication with 
replica's  consumers in which case the consumers should be reinitialized.

Feb  3 19:32:35 mmt-l-al19 kernel: ns-slapd[5575]: segfault at 
0000000000000000 rip 000000364fa79140 rsp 0000000056bd3b18 error 4

Have you any idea?

Thanks

  
    

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-- 
Francesco Fiore
System Integrator
Babel S.r.l. - http://www.babel.it
P.zza S.Benedetto da Norcia, 33 - 00040 Pomezia (Roma)


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Thanks
-- 
Francesco Fiore
System Integrator
Babel S.r.l. - http://www.babel.it
P.zza S.Benedetto da Norcia, 33 - 00040 Pomezia (Roma)


CONFIDENZIALE: Questo messaggio ed i suoi allegati sono di carattere
confidenziale per i destinatari in indirizzo. Se hai ricevuto questo
messaggio per errore sei invitato cortesemente a rispondere
immediatamente al mittente e cancellare tutti i suoi contenuti.
  
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