[Pkg-openldap-devel] Bug#816294: Bug#816294: slapd segfault on update dbconfig

[Ryan Tandy]

Control: tag -1 moreinfo

On Mon, Feb 29, 2016 at 03:57:30PM +0100, Thomas Otto wrote:
>ldapmodify -Z -h ldaptest1
>...
>dn: olcDatabase={3}hdb,cn=config
>changetype: modify
>replace: olcDbConfig
>olcDbConfig: # Note: most DB_CONFIG settings will take effect only upon rebuilding
>olcDbConfig: # the DB environment.
>olcDbConfig: #
>olcDbConfig: # one 0.25 GB cache
>olcDbConfig: #set_cachesize 0 268435456 1
>olcDbConfig: set_cachesize 1 0 1
>olcDbConfig: # Data Directory
>olcDbConfig: #set_data_dir db
>olcDbConfig: # Transaction Log settings
>olcDbConfig: set_lg_regionmax 262144
>olcDbConfig: set_lg_bsize 2097152
>olcDbConfig: #set_lg_dir logs
>olcDbConfig: # delete Transaction Logs:
>olcDbConfig: set_flags DB_LOG_AUTOREMOVE
>olcDbConfig: # Note that if the log files are removed automatically, recovery after
>olcDbConfig: # a catastrophic failure is likely to be impossible.
>olcDbConfig: # http://wiki.zimbra.com/wiki/OpenLDAP_Performance_Tuning_5.0
>olcDbConfig: # db5.1_stat -c -h /var/lib/ldap/logs
>olcDbConfig: set_lk_max_locks   60000
>olcDbConfig: set_lk_max_objects 25000
>olcDbConfig: set_lk_max_lockers 1500
>
>modifying entry "olcDatabase={3}hdb,cn=config"
>ldap_modify: Other (e.g., implementation specific) error (80)
>	additional info: failed to reopen database, rc=22

I performed the same modification on a new install of slapd 
2.4.40+dfsg-1+deb8u2, and did not observe a crash.

What was the olcDbConfig value prior to this change?

What sort of load was slapd under at the time? From the name, I guess 
this might be an accesslog database?

I don't know for sure whether it's relevant, but for completeness: do 
you have other hdb databases, and what do their configs look like?

If you can think of any other information that might help reproduce the 
crash, please mention it.

thanks,
Ryan