What causes DBERROR db4: PANIC: Invalid argument?

[Larry Rosenbaum]

> From: info-cyrus-bounces at lists.andrew.cmu.edu [mailto:info-cyrus-
> bounces at lists.andrew.cmu.edu] On Behalf Of Simon Matter
> 
> > Yesterday our Cyrus server stopped responding and I saw the following
> > messages in the log file:
> >
> >
> >
> > Dec  7 18:13:55 email imaps[9684]: [ID 866726 local6.warning] DBERROR
> > db4: PANIC: Invalid argument
> >
> > Dec  7 18:13:55 email imaps[9684]: [ID 864961 local6.crit] DBERROR:
> > critical database situation
> >
> > Dec  7 18:13:55 email master[248]: [ID 684980 local6.warning] service
> > imaps pid 9684 in READY state: term
> >
> > inated abnormally
> >
> > Dec  7 18:13:55 email imaps[9682]: [ID 866726 local6.warning] DBERROR
> > db4: PANIC: fatal region error dete
> >
> > cted; run recovery
> >
> >
> >
> > The last 3 lines (or variations of them) were repeated over and over.  I
> > was able to fix the server by shutting down Cyrus, running "ctl_cyrusdb
> > -r", and restarting Cyrus.
> >
> >
> >
> > 1)       What caused the PANIC: Invalid argument?  Is it a Cyrus bug?
> 
> Hm, no idea what happened here. My only suggestion is to move all db4 to
> skiplist.

I'm using the defaults, which means the mailbox DB is skiplist.  I'm
assuming the mailbox DB was hosed because the "ctl_mboxlist -d" didn't work
before I ran the recover command and did work afterwards.


> > 2)       If the recovery had failed, I would have had to restore
> > mailboxes.db from a backup.  We have text backups of the mailbox db
> > created by ctl_mboxlist.  What is the proper procedure for restoring it?
> > We would want to get rid of the corrupt data, which would involve
> > deleting mailboxes.db, but are there other files that should also be
> > deleted?
> 
> Importing mailboxes.db should be done via "ctl_mboxlist -u". From my
> experience it may be needed to wipe the contents of the directory
> [configdir]/db/ before creating new databases. Otherwise parts of the old
> db environment are still there and disturbe you.

Thanks for this information.
 
> Simon
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