On 9.8.2012, at 10.15, tonio@starbridge.org wrote:
Could you run imap-login via valgrind (it slows things down):
service imap-login { executable = /usr/bin/valgrind -q --vgdb=no /usr/local/libexec/dovecot/imap-login }
(you may not have/need --vgdb=no, depends on your valgrind version)
Timo, I can'f find what trigger this error, and it seems only happenig under some load here the error log in mail.log: .. Aug 9 09:01:36 smtp dovecot: imap-login: Error: ==27313== Invalid read of size 4 Aug 9 09:01:37 smtp dovecot: imap-login: Error: ==27313== at 0x5069BA1: settings_parser_get_list (settings-parser.c:254) Aug 9 09:01:37 smtp dovecot: imap-login: Error: ==27313== by 0x4E3EA7C: login_settings_read (login-settings.c:230) .. Aug 9 09:01:37 smtp dovecot: imap-login: Error: ==27313== Address 0x65fc1e0 is 96 bytes inside a block of size 8,192 free'd Aug 9 09:01:37 smtp dovecot: imap-login: Error: ==27313== at 0x4C27D4E: free (vg_replace_malloc.c:427) Aug 9 09:01:37 smtp dovecot: imap-login: Error: ==27313== by 0x508DC1E: master_service_settings_cache_read (master-service-settings-cache.c:168)
Thanks. Obviously I shouldn't free cached settings while they're still being used. :) I'll get it fixed tomorrow. For now you could work around it by increasing config_cache_size setting (default is 1M).