While playing with the cvt_cyrusdb utility (and Simon's excellent cvt_cyrusdb_all script) I came across this problem when converting a database *from* berkeley *to* skiplist.
Let's say I have /var/lib/imap/mailboxes.db in berkeley format. I also have berkeley transaction log files in /var/lib/imap/log.* and /var/lib/imap/db/log.*.
I then shut down the cyrus daemon and convert mailboxes.db to skiplist. The conversion succeeds: # file mailboxes.db mailboxes.db: Cyrus skiplist DB
Now I restart cyrus. And get this in the logs: ctl_cyrusdb[30046]: DBERROR db4: /var/lib/imap/mailboxes.db: unexpected file type or format ctl_cyrusdb[30046]: DBERROR db4: Recovery function for LSN 1 4471396 failed ctl_cyrusdb[30046]: DBERROR db4: PANIC: Invalid argument ctl_cyrusdb[30046]: DBERROR: critical database situation
It seems ctl_cyrusdb is attempting to read mailboxes.db as a DB file and not skiplist. I *suppose* this happens because it is trying to recover the database using the log file which was left there and contains BDB transactions. AFAIK, however, this type of recovery procedure is called "catastrophic" by the berkeley folks: a normal recovery procedure would only touch log files which contain uncommited transactions. Looking at the code, I see that it is not performing catastrophic recovery (it's just using the DB_RECOVER flag when opening the environment), so I'm at a loss here.
The only way to remedy this situation is to remove the relevant log files. Anybody care to comment?
That's what I have done in the past. The problem is that the log files still have references to the now nonexistent mailboxes.db. What needs to happen is that the mailbox in question needs to be removed from the BDB environment so we don't try to recover it. Its possible that doing a checkpoint (ctl_cyrusdb -c) before the conversion may solve the problem, but I have never tried it.
-- Kenneth Murchison Oceana Matrix Ltd. Software Engineer 21 Princeton Place 716-662-8973 x26 Orchard Park, NY 14127 --PGP Public Key-- http://www.oceana.com/~ken/ksm.pgp --- Home Page: http://asg.web.cmu.edu/cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
