[Dovecot] Errors on high load

[Allan Cassaro]

Hi, always when my server is on high load I saw this errors on logs:

curie:~# uptime
10:22:38 up 19 days, 19:19,  2 users,  load average: 207.01, 169.27, 94.41

Sep 15 17:00:26 curie dovecot: imap-login: *** glibc detected ***
imap-login: malloc(): memory corruption: 0x00000000009f8560 ***
Sep 15 17:00:26 curie dovecot: child 24012 (login) killed with signal 6
Sep 15 18:48:36 curie dovecot: auth(default_with_listener): BUG:
Authentication client said it's PID 0
Sep 15 18:48:36 curie dovecot: child 24014 (login) killed with signal 11
Sep 16 09:05:19 curie dovecot: imap-login: *** glibc detected ***
imap-login: malloc(): memory corruption: 0x00000000008c4bc0 ***
Sep 16 09:05:19 curie dovecot: child 24013 (login) killed with signal 6
Sep 16 10:17:14 curie dovecot: imap-login: *** glibc detected ***
imap-login: malloc(): memory corruption: 0x000000000098bb30 ***
Sep 16 10:17:14 curie dovecot: child 24015 (login) killed with signal 6
Sep 16 10:19:02 curie dovecot: child 24002 (login) killed with signal 6
Sep 16 10:19:02 curie dovecot: managesieve-login: *** glibc detected
*** managesieve-login: double free or corruption (!prev):
0x000000000066d700 ***

Sep 16 10:19:18 curie dovecot: Panic: IMAP(geduardo): file
maildir-save.c: line 241 (maildir_get_updated_filename): assertion
failed: (ctx->keywords_sync_ctx != NULL || mf->keywords_count == 0)
Sep 16 10:19:18 curie dovecot: IMAP(geduardo): Raw backtrace:
/usr/libexec/dovecot/imap [0x47a7f2] -> /usr/libexec/dovecot/imap
[0x47a863] -> /usr/libexec/dovecot/imap [0x479f16] ->
/usr/libexec/dovecot/imap [0x43295b] ->
/usr/libexec/dovecot/imap(maildir_transaction_save_commit_pre+0x19a)
[0x4331ea] -> /usr/libexec/dovecot/imap [0x42d0b7] ->
/usr/libexec/dovecot/imap(index_transaction_commit+0x3f) [0x44b16f] ->
/usr/lib/dovecot/imap/lib10_quota_plugin.so [0x2b70f72e90d7] ->
/usr/libexec/dovecot/imap(cmd_copy+0x344) [0x4181f4] ->
/usr/libexec/dovecot/imap(cmd_uid+0x52) [0x41c072] ->
/usr/libexec/dovecot/imap [0x41ca4c] -> /usr/libexec/dovecot/imap
[0x41cb02] -> /usr/libexec/dovecot/imap [0x41d2cf] ->
/usr/libexec/dovecot/imap(client_input+0x63) [0x41d503] ->
/usr/libexec/dovecot/imap(io_loop_handler_run+0xf8) [0x481448] ->
/usr/libexec/dovecot/imap(io_loop_run+0x1d) [0x4805ad] ->
/usr/libexec/dovecot/imap(main+0x3c2) [0x424962] ->
/lib/libc.so.6(__libc_start_main+0xe6) [0x2b70f6d9e1a6] ->
/usr/libexec/dovecot
Sep 16 10:19:18 curie dovecot: child 20481 (imap) killed with signal 6

I have about 1000 users.
To me, this is not a problem, nothing strange occurs (except the
slowly, but under heavy load this is normal).

But I think this is interesting to developers... :D

Regards.

-- 
http://allan.cassaro.googlepages.com