Re: slave slapd crashes on MOD by slurpd (ITS#2527)

[luca.scamoni@sys-net.it]

astreib@indiana.edu wrote:

>Full_Name: Allan Streib
>Version: 2.0.27
>OS: RedHat Linux 7.3
>URL: ftp://ftp.openldap.org/incoming/
>Submission from: (NULL) (156.56.117.79)
>
>
>Original message posted to OpenLDAP-Software:
>
>  
>
>>Both master and slave running OpenLDAP 2.0.27/ldbm.
>>
>>A change is trying to be replicated to the slave, and the slave crashes.
>>Slave log shows:
>>
>>May 19 14:53:54 xxxxxx slapd[2409]: conn=3 op=4 MOD
>>    
>>
>dn="iuEduUPID=f5e016cc9bdb465620b8975f215b0c07,ou=people,dc=iu,dc=edu"
>  
>
>>May 19 14:53:54 xxxxxx slapd[2409]: idl_insert_key: idl_fetch_one returned
>>    
>>
>NULL
>  
>
>>That is the last log entry.
>>
>>The dbb files were recently rebuilt (< 3 days ago) using slapadd from a
>>slapcat dump due to suspected indexing problems.  Since this operation
>>succeeded on the master, why did it fail on the slave?
>>
>>I can query the slave entry without error, and slapd restarts without
>>error.  But if I then restart slurpd the slave immediately crashes again
>>on the same operation.  Suggestions?
>>    
>>
>
>Follow-up by Howard Chu:
>
>  
>
>>There is a patch in CVS that may address this problem. It was never released
>>since no one provided any feedback about whether it fixed their problem or
>>not.
>>
>>I suggest you file an ITS for this problem, then try pulling from the last
>>rev of servers/slapd/back-ldbm/idl.c from the 2.0 branch:
>>       cvs upd -r OPENLDAP_REL_ENG_2_0 idl.c
>>
>>and report back with your results.
>>    
>>
>
>I have rebuilt slapd using the 2.0.27 release with with idl.c v 1.29.2.16 and it
>passed all the self-tests.  I will report back if it is observed that this
>problem seems to be corrected in our production installation.
>  
>
FYI we applied this patch in our production environment a few days after 
it came out in March.
Up till now no problems have been reported. It's deployed on at least 12 
slaves managing about 70k entries with a daily update of about 15k 
(adds, mods and deletes).