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Re: BDB recover problem after unnormally system shutdown (ITS#3355)
This appears to be either a software use issue (in
regards to Berkeley DB tools) or possibly a bug in
Berkeley DB. I see nothing that would indicate to
me that this is due to a bug in OpenLDAP Software.
Anyways, I suggest you first make sure your
environment is proper. For instance, verify that
the version of db_recover you are using comes from
the some release of Berkeley DB that you configured
OpenLDAP to use. Beyond that, you might contact
the folks at Sleepycat <http://www.sleepycat.com>
for assistance, our use one of the mailing lists
they have established for Berkeley DB.
At 07:32 AM 10/1/2004, email@example.com wrote:
>Full_Name: Attila Szuts
>OS: Debian Sarge
>Submission from: (NULL) (220.127.116.11)
>LDAP: 2.2.13 (But I think it is in newer versions.)
>I don't if anyone had similar problem, but it happened to me multiple times at
>I run OpenLDAP on a mail server as user database server. I modify ldap entries
>with some PHP
># Features to permit
>checkpoint 10 2
>index objectClass pres,eq
>#And some ACLs...
>BDB DB_CONFIG file: (reside in slapd.conf -> directory)
>I thought that my config settings will be automatically committing any changes
>in BDB after
>2 minutes or after 10kb.
>Then came an unplanned system shutdown(caused by eletrical breakdown without
>hours later than last ldap entry has modified).
>After booting slapd was normally restarted by initd.
>All works fine, except I could not see my last few changes in ldap.
>I repaired database with db_recover -v , but it doesn't help.
>(When I used db_recover -v -c I became this error message:
> db_recover: Finding last valid log LSN: file: 1 offset 1079544
> db_recover: Recovery starting from 
> db_recover: Log sequence error: page LSN 1 1052620; previous LSN 1 1095735
> db_recover: Recovery function for LSN 1 1052620 failed on forward pass
> db_recover: PANIC: Invalid argument
> db_recover: PANIC: fatal region error detected; run recovery
>I moved the whole database to another place and vi-ed(viewed) the
>file and saw that my modifications(entries) are 100kbyte before EOF.(10 times
>more than 10kbyte!)
>Then I vi-ed dn2id.bdb and id2entry.bdb files but couldn't find these entries.
>Why cannot db_recover *really* recover data from the logfile? I couldn't find
>any software that can parse log file or bdb files to see records inner BDB.
>(Similar has happened with previous OpenLDAP versions, but I can't reproduce
>this error because
>this can easily kill my machines. Sorry.)
>Am I misconfigured something, or Berkeley DB is faulty or something else? What
>shall I do in the
>I don't know exactly how OpenLDAP with BDB or standalone BDB internally works,
>if this seems like BDB bug then sorry this bugreport and please give me some
>instruction how/what to test or post to BDB buglist.
>P.S: Another BDB problem was when disk space runs out: slapd and BDB crashes,
>and can't recover.