Hello,

Recently, we had a file system problem. After fsck we started to get some core dump with imap process.

Nov 4 15:15:04 mail_server1 dovecot: imap(user@domain.tld): Panic: file squat-trie.c: line 293 (squat_trie_lock): assertion failed: (trie->fd != -1) Nov 4 15:15:04 mail_server1 dovecot: imap(user@domain.tld): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x4892a) [0x7fe8b7c9392a] -> /usr/lib/dovecot/libdovecot.so.0(+0x48976) [0x7fe8b7c93976] -> /usr/lib/dovecot/libdovecot.so.0(i_error+0) [0x7fe8b7c66faf] -> /usr/lib/dovecot/modules/lib21_fts_squat_plugin.so(+0x4ef4) [0x7fe8b51d9ef4] -> /usr/lib/dovecot/modules/lib21_fts_squat_plugin.so(squat_trie_build_deinit+0x9d2) [0x7fe8b51dcc02] -> /usr/lib/dovecot/modules/lib21_fts_squat_plugin.so(+0x4150) [0x7fe8b51d9150] -> /usr/lib/dovecot/modules/lib21_fts_squat_plugin.so(+0x41b1) [0x7fe8b51d91b1] -> /usr/lib/dovecot/modules/lib20_fts_plugin.so(+0x6b7c) [0x7fe8b5a05b7c] -> /usr/lib/dovecot/modules/lib20_fts_plugin.so(fts_backend_update_deinit+0x2c) [0x7fe8b5a05bfc] -> /usr/lib/dovecot/modules/lib10_quota_plugin.so(+0xb65a) [0x7fe8b642765a] -> /usr/lib/dovecot/libdovecot-storage.so.0(mdbox_sync_begin+0x419) [0x7fe8b7f22069] -> /usr/lib/dovecot/libdovecot-storage.so.0(mdbox_sync+0x46) [0x7fe8b7f224a6] -> /usr/lib/dovecot/libdovecot-storage.so.0(mdbox_storage_sync_init+0x87) [0x7fe8b7f22587] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x31) [0x7fe8b7f614d1] -> dovecot/imap user@domain.tld 204.174.223.223 UID [0x419397] -> dovecot/imap user@domain.tld204.174.223.223 UID [0x419637] -> dovecot/imap user@domain.tld 204.174.223.223 UID [0x41131d] -> dovecot/imap user@domain.tld 204.174.223.223 UID [0x411b7f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7fe8b7c9fb56] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x9f) [0x7fe8b7ca0b8f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7fe8b7c9faf8] -> /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fe8b7c8b413] -> dovecot/imap user@domain.tld 204.174.223.223 UID [0x419dd4] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7fe8b78dfead] -> dovecot/imap [user@domain.tld 204.174.223.223 UID Nov 4 15:15:04 mail_server1 dovecot: imap(user@domain.tld): Fatal: master: service(imap): child 28415 killed with signal 6 (core dumped)

doveadm index -u user@domain.tld mailbox_name

Removing index files and re index help with the crashes. From time to time we still get these in the log:

Nov 5 10:52:53 mail_server1 dovecot: imap(user@domain.tld): Error: Corrupted squat uidlist file /media/drbd/user_name/mdbox/mailboxes/Drafts/dbox-Mails/dovecot.index.search.uids: wrong indexid Nov 5 11:40:00 mail_server1 dovecot: imap(user@domain.tld): Error: Corrupted squat uidlist file /media/drbd/user_name/mdbox/mailboxes/folder2/dbox-Mails/dovecot.index.search.uids: wrong indexid

I am using: dovecot-dbg 2:2.1.16-0~auto+30

Thanks Kui.Z