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Bug 948056

Summary:	segfault in db2ldif
Product:	Red Hat Enterprise Linux 7	Reporter:	Nathan Kinder <nkinder>
Component:	389-ds-base	Assignee:	Rich Megginson <rmeggins>
Status:	CLOSED CURRENTRELEASE	QA Contact:	IDM QE LIST <seceng-idm-qe-list>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.0	CC:	amsharma, mreynolds, nhosoi, sramling
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	389-ds-base-1.3.1.2-1.el7	Doc Type:	Bug Fix
Doc Text:	Cause: An incomplete CLEANALLRUV task is present when doing an offline db2ldif. Consequence: The CLEANALLRUV task starts up, and triggers a server crash because it tries to trim the changelog - which is not started during an offline db2ldif. Fix: Prevent the CLEANALLRUV task from stating when performing offline tasks. Result: Offline tasks, like db2ldif, do not crash the server.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-06-13 13:18:25 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Nathan Kinder 2013-04-03 21:06:16 UTC

This bug is created as a clone of upstream ticket:
https://fedorahosted.org/389/ticket/47311

Seeing a segfault trying to do an offline backup using db2ldif.

I'm not entirely sure how I got my instance into whatever state it is in. I believe it had a replica at one point which I deleted AFTER it was already gone. This was done in the context of IPA so we create a CLEANALLRUV task to remove things.

Listing all the tasks after startup returns nothing.

{{{
# gdb /usr/sbin/ns-slapd
...
(gdb) run  db2ldif -D /etc/dirsrv/slapd-GREYOAK-COM -r -n userRoot -a /tmp/test.ldif
Starting program: /usr/sbin/ns-slapd db2ldif -D /etc/dirsrv/slapd-GREYOAK-COM -r -n userRoot -a /tmp/test.ldif
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[02/Apr/2013:13:27:13 -0400] - /etc/dirsrv/slapd-GREYOAK-COM/dse.ldif: nsslapd-maxdescriptors: nsslapd-maxdescriptors: invalid value "8192", maximum file descriptors must range from 1 to 4096 (the current process limit).  Server will use a setting of 4096.
[02/Apr/2013:13:27:13 -0400] - Config Warning: - nsslapd-maxdescriptors: invalid value "8192", maximum file descriptors must range from 1 to 4096 (the current process limit).  Server will use a setting of 4096.
[02/Apr/2013:13:27:13 -0400] - userRoot: entry cache size: 10485760B; db size: 344064B
[02/Apr/2013:13:27:13 -0400] - ipaca: entry cache size: 10485760B; db size: 319488B
[02/Apr/2013:13:27:13 -0400] - Total entry cache size: 20971520B; dbcache size: 10000000B; available memory size: 1001832448B
[02/Apr/2013:13:27:13 -0400] - Detected Disorderly Shutdown last time Directory Server was running, recovering database.
[New Thread 0x7f6a2f9a5700 (LWP 24949)]
[New Thread 0x7f6a2f1a4700 (LWP 24950)]
[New Thread 0x7f6a2e9a3700 (LWP 24951)]
[New Thread 0x7f6a2e1a2700 (LWP 24952)]
[02/Apr/2013:13:27:13 -0400] ldbm_usn_init - backend: userRoot (global mode)
[02/Apr/2013:13:27:13 -0400] ldbm_usn_init - backend: ipaca (global mode)
[02/Apr/2013:13:27:13 -0400] schema-compat-plugin - warning: no entries set up under cn=computers, cn=compat,dc=greyoak,dc=com
[02/Apr/2013:13:27:13 -0400] schema-compat-plugin - warning: no entries set up under cn=ng, cn=compat,dc=greyoak,dc=com
[02/Apr/2013:13:27:13 -0400] schema-compat-plugin - warning: no entries set up under ou=sudoers,dc=greyoak,dc=com
[New Thread 0x7f6a2d9a1700 (LWP 24953)]
[02/Apr/2013:13:27:13 -0400] - Skipping CoS Definition cn=Password Policy,cn=accounts,dc=greyoak,dc=com--no CoS Templates found, which should be added before the CoS Definition.
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - CleanAllRUV Task: cleanAllRUV task found, resuming the cleaning of rid(3)...
[New Thread 0x7f6a2d1a0700 (LWP 24954)]
[New Thread 0x7f6a2c99f700 (LWP 24955)]
[New Thread 0x7f6a2c97e700 (LWP 24956)]
[New Thread 0x7f6a27fff700 (LWP 24957)]
[New Thread 0x7f6a277fe700 (LWP 24958)]
ldiffile: /tmp/test.ldif
[02/Apr/2013:13:27:13 -0400] - export userRoot: Processed 245 entries (100%).
[Thread 0x7f6a277fe700 (LWP 24958) exited]
[Thread 0x7f6a2c97e700 (LWP 24956) exited]
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Cleaning rid (3)...
[Thread 0x7f6a27fff700 (LWP 24957) exited]
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Waiting to process all the updates from the deleted replica...
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Waiting for all the replicas to be online...
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Waiting for all the replicas to receive all the deleted replica updates...
[Thread 0x7f6a2c99f700 (LWP 24955) exited]
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Sending cleanAllRUV task to all the replicas...
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Cleaning local ruv's...
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Waiting for all the replicas to be cleaned...
[New Thread 0x7f6a2c99f700 (LWP 24959)]
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - changelog program - _cl5AddThread: invalid changelog state - 0
[02/Apr/2013:13:27:13 -0400] NSMMReplicationPlugin - changelog program - trigger_cl_trimming: failed to increment thread count NSPR error - 0

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f6a2c99f700 (LWP 24959)]
__GI___pthread_mutex_lock (mutex=0x0) at pthread_mutex_lock.c:50
50        unsigned int type = PTHREAD_MUTEX_TYPE (mutex);
Missing separate debuginfos, use: debuginfo-install audit-libs-2.2.2-2.fc18.x86_64 cyrus-sasl-gssapi-2.1.23-36.fc18.x86_64 cyrus-sasl-lib-2.1.23-36.fc18.x86_64 cyrus-sasl-md5-2.1.23-36.fc18.x86_64 cyrus-sasl-plain-2.1.23-36.fc18.x86_64 keyutils-libs-1.5.5-3.fc18.x86_64 krb5-libs-1.10.3-5.fc18.x86_64 libcom_err-1.42.5-1.fc18.x86_64 libgcc-4.7.2-8.fc18.x86_64 libicu-49.1.1-5.fc18.x86_64 libstdc++-4.7.2-8.fc18.x86_64 libuuid-2.22.1-2.4.fc18.x86_64 nspr-4.9.4-1.fc18.x86_64 nss-3.14.1-3.fc18.x86_64 nss-softokn-3.14.1-5.fc18.x86_64 nss-softokn-freebl-3.14.1-5.fc18.x86_64 nss-util-3.14.1-2.fc18.x86_64 openldap-2.4.33-3.fc18.x86_64 openssl-libs-1.0.1c-7.fc18.x86_64 pam-1.1.6-3.fc18.1.x86_64 slapi-nis-0.44-1.fc18.x86_64 sqlite-3.7.13-2.fc18.x86_64 svrcore-4.0.4-8.fc18.x86_64
(gdb) where
#0  __GI___pthread_mutex_lock (mutex=0x0) at pthread_mutex_lock.c:50
#1  0x00007f6a390f06f9 in PR_Lock () from /lib64/libnspr4.so
#2  0x00007f6a3356265a in _cl5DoTrimming (rid=rid@entry=3)
    at ldap/servers/plugins/replication/cl5_api.c:3435
#3  0x00007f6a33562c51 in trigger_cl_trimming_thread (arg=<optimized out>)
    at ldap/servers/plugins/replication/cl5_api.c:6591
#4  0x00007f6a390f5e23 in _pt_root () from /lib64/libnspr4.so
#5  0x0000003ce4e07d15 in start_thread (arg=0x7f6a2c99f700)
    at pthread_create.c:308
#6  0x0000003ce46f246d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:114
}}}

After restart the error log shows that CLEANALLRUV was attempted:

{{{
[02/Apr/2013:13:37:02 -0400] - Listening on /var/run/slapd-GREYOAK-COM.socket for LDAPI requests
[02/Apr/2013:13:37:05 -0400] slapi_ldap_bind - Error: could not send startTLS request: error -1 (Can't contact LDAP server) errno 107 (Transport endpoint is not connected)
[02/Apr/2013:13:37:11 -0400] slapi_ldap_bind - Error: could not send startTLS request: error -1 (Can't contact LDAP server) errno 107 (Transport endpoint is not connected)
[02/Apr/2013:13:37:11 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Cleaning rid (3)...
[02/Apr/2013:13:37:11 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Waiting to process all the updates from the deleted replica...
[02/Apr/2013:13:37:11 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Waiting for all the replicas to be online...
[02/Apr/2013:13:37:11 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Waiting for all the replicas to receive all the deleted replica updates...
[02/Apr/2013:13:37:11 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Sending cleanAllRUV task to all the replicas...
[02/Apr/2013:13:37:11 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Cleaning local ruv's...
[02/Apr/2013:13:37:11 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Waiting for all the replicas to be cleaned...
[02/Apr/2013:13:37:12 -0400] NSMMReplicationPlugin - CleanAllRUV Task: failed to remove replica config (16), rid (3)
[02/Apr/2013:13:37:12 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Waiting for all the replicas to finish cleaning...
[02/Apr/2013:13:37:12 -0400] NSMMReplicationPlugin - CleanAllRUV Task: Successfully cleaned rid(3).
[02/Apr/2013:13:37:23 -0400] slapi_ldap_bind - Error: could not send startTLS request: error -1 (Can't contact LDAP server) errno 107 (Transport endpoint is not connected)
[02/Apr/2013:13:37:47 -0400] slapi_ldap_bind - Error: could not send startTLS request: error -1 (Can't contact LDAP server) errno 107 (Transport endpoint is not connected)
[02/Apr/2013:13:38:35 -0400] slapi_ldap_bind - Error: could not send startTLS request: error -1 (Can't contact LDAP server) errno 107 (Transport endpoint is not connected)
}}}

Comment 1 Rich Megginson 2013-10-01 23:26:53 UTC

moving all ON_QA bugs to MODIFIED in order to add them to the errata (can't add bugs in the ON_QA state to an errata).  When the errata is created, the bugs should be automatically moved back to ON_QA.

Comment 3 Amita Sharma 2014-01-09 13:22:55 UTC

Hi Mark,

How to reproduce this issue/verification steps?
should I try to stop the server while db2ldif initiated?

Thanks,
Ami

Comment 4 Rich Megginson 2014-01-09 14:52:14 UTC

(In reply to Amita Sharma from comment #3)
> Hi Mark,
> 
> How to reproduce this issue/verification steps?
> should I try to stop the server while db2ldif initiated?
> 
> Thanks,
> Ami

You will need to have a CLEANALLRUV task running, then shutdown the server, so that the server has to write out the cleanallruv task to the dse.ldif.  Then do an offline db2lidf.

Comment 5 mreynolds 2014-01-16 13:47:55 UTC

Rich is correct.  

[1]  Setup two replicas (A and B)
[2]  Stop B
[3]  Run cleanallruv on replica A
[4]  Stop A
[5]  Run db2ldif -> db2ldif should complete and not crash.

Comment 6 Amita Sharma 2014-01-24 07:46:11 UTC

[root@dhcp201-149 ~]# tail -f /var/log/dirsrv/slapd-M1/access
[24/Jan/2014:12:48:21 +051800] conn=36 op=1 RESULT err=0 tag=107 nentries=0 etime=0
[24/Jan/2014:12:48:21 +051800] conn=36 op=2 UNBIND
[24/Jan/2014:12:48:21 +051800] conn=36 op=2 fd=64 closed - U1
[24/Jan/2014:12:48:22 +051800] conn=37 fd=64 slot=64 connection from 10.65.201.149 to 10.65.201.149
[24/Jan/2014:12:48:22 +051800] conn=37 op=0 BIND dn="cn=directory manager" method=128 version=3
[24/Jan/2014:12:48:22 +051800] conn=37 op=0 RESULT err=0 tag=97 nentries=0 etime=0 dn="cn=directory manager"
[24/Jan/2014:12:48:22 +051800] conn=37 op=1 ADD dn="cn=M3Task,cn=cleanallruv,cn=tasks,cn=config"
[24/Jan/2014:12:48:23 +051800] conn=37 op=1 RESULT err=0 tag=105 nentries=0 etime=1
[24/Jan/2014:12:48:23 +051800] conn=37 op=2 UNBIND
[24/Jan/2014:12:48:23 +051800] conn=37 op=2 fd=64 closed - U1
=============================
[root@dhcp201-149 ~]# db2ldif -Z M1 -n userRoot -a /export/example.ldif
Exported ldif file: /export/example.ldif
ldiffile: /export/example.ldif
[24/Jan/2014:12:49:57 +051800] - export userRoot: Processed 9 entries (100%).
[24/Jan/2014:12:49:57 +051800] - All database threads now stopped
=============================
[root@dhcp201-149 ~]# tail -f /var/log/dirsrv/slapd-M1/errors
[24/Jan/2014:12:48:23 +051800] NSMMReplicationPlugin - CleanAllRUV Task: Replica not online (agmt="cn=21921_to_21905" (dhcp201-149:21905))
[24/Jan/2014:12:48:23 +051800] NSMMReplicationPlugin - CleanAllRUV Task: Not all replicas online, retrying in 10 seconds...
[24/Jan/2014:12:48:23 +051800] - slapd shutting down - signaling operation threads
[24/Jan/2014:12:48:23 +051800] - slapd shutting down - closing down internal subsystems and plugins
[24/Jan/2014:12:48:23 +051800] NSMMReplicationPlugin - CleanAllRUV Task: Server shutting down.  Process will resume at server startup
[24/Jan/2014:12:48:23 +051800] - Waiting for 4 database threads to stop
[24/Jan/2014:12:48:24 +051800] - All database threads now stopped
[24/Jan/2014:12:48:24 +051800] - slapd stopped.
[24/Jan/2014:12:49:57 +051800] - export userRoot: Processed 9 entries (100%).
[24/Jan/2014:12:49:57 +051800] - All database threads now stopped

no crash found. So marking bug as VERIFIED.

Comment 7 Ludek Smid 2014-06-13 13:18:25 UTC

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.