DBERROR db4: Lock table is out of available locker entries

[Dudi Finkel]

Hello,

 

I'm using:

cyrus-imapd-2.3.7

db4-4.3.29

The operating system is Linux RedHat 5.3

 

Sometimes, the number of lockers increases until no more lockers are left.

I searched for lock in the maillog file (grep lock mailog):

 

imap[12470]: DBMSG: 25913 lockers

imap[7497]: DBMSG: 26052 lockers

imap[5295]: DBMSG: 26528 lockers

imap[5305]: DBMSG: 26552 lockers

.

.

.

.

imap[13438]: DBMSG: 49823 lockers

imap[13357]: DBMSG: 49910 lockers

imap[25643]: DBMSG: 49955 lockers

imap[10874]: DBERROR db4: Lock table is out of available locker entries

imap[10875]: DBERROR db4: Lock table is out of available locker entries

imap[10876]: DBERROR db4: Lock table is out of available locker entries

 

Eventually I see the following errors:

 

imap[16719]: DBERROR db4: PANIC: fatal region error detected; run recovery

imap[16719]: DBERROR: critical database situation

master[22961]: process 16719 exited, status 75

master[22961]: service imap pid 16719 in READY state: terminated abnormally

master[16720]: about to exec /usr/lib/cyrus-imapd/imapd

 

 

The number of lockers was growing for more than a week

Why this is happening?

How can I fix it?

How can I reproduce it?

 

Thank you,

Dudi

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