[Dovecot] backtrace from postgres dict
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Hi,
since I enabled ACLs I get following backtrace. It looks like that it happens if the ACLs had been changed only. Also, it looks like that it always happens 1 minute after last "dict: Info: pgsql(localhost): Connected to database dovecot", no matter if the user is logged in (and idle) or logged off. Postgres logs: "could not receive data from client: Connection reset by peer" and "unexpected EOF on client connection".
Is there some TCP keep alive issue? Postgres is using the "system default" for TCP keep alive. I'm currently testing ACLs via telnet, so the activity with the ACL dict is pretty low, hence, an idle timeout would make much sense.
../../sbin/dovecot --version
2.1.10 (a4f02f6c0d32)
dict connect string: connect = host=localhost dbname=db user=user
2012-11-28 10:03:39 dict: Info: pgsql(localhost): Connected to database dovecot 2012-11-28 10:03:39 dict: Info: pgsql(localhost): Connected to database dovecot 2012-11-28 10:03:39 dict: Info: pgsql(localhost): Connected to database dovecot
2012-11-28 10:03:58 IMAP(user) [22922]: Info: Disconnected: Logged out in=23 out=763
2012-11-28 10:04:41 dict: Panic: file driver-pgsql.c: line 84 (driver_pgsql_set_state): assertion failed: (state == SQL_DB_STATE_BUSY || db->cur_result == NULL)
2012-11-28 10:04:41 dict: Error: Raw backtrace: /usr/local/dovecot-2.1.10/lib/dovecot/libdovecot.so.0(+0x4857a) [0x7f91f511157a] -> /usr/local/dovecot-2.1.10/lib/dovecot/libdovecot.so.0(+0x485c6) [0x7f91f51115c6] -> /usr/local/dovecot-2.1.10/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f91f50e4eaf] -> dovecot2.1/dict() [0x40aa36] -> dovecot2.1/dict() [0x40aa91] -> dovecot2.1/dict() [0x40bed3] -> dovecot2.1/dict() [0x409504]
- -> dovecot2.1/dict(sql_db_cache_deinit+0x20) [0x408a60] -> dovecot2.1/dict(main+0x169) [0x405a59] -> /lib/libc.so.6(__libc_start_main+0xfd) [0x7f91f4b5cc8d] -> dovecot2.1/dict() [0x404bb9]
2012-11-28 10:04:41 dict: Fatal: master: service(dict): child 22923 killed with signal 6 (core not dumped)
Steffen Kaiser -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux)
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On Wed, 28 Nov 2012, Steffen Kaiser wrote:
hmm, it seems to be more than just an idle timeout.
When I use this script:
( echo 1 login user pass sleep 1 echo 2 getacl Junk sleep 1 for a in $(seq 1 ${1-4}); do echo 3-$a deleteAcl Junk user2 sleep 30 echo 3-$a SetAcl Junk user2 kxilrsc sleep 30 done echo + logout ) | nc -q1 localhost 143
I get (attached are more lines of the log):
2012-11-28 11:08:07 dict: Info: pgsql(localhost): Connected to database dovecot scanning for dovecot-acl 2012-11-28 11:09:07 dict: Info: pgsql(localhost): Connected to database dovecot scanning for dovecot-acl 2012-11-28 11:09:37 dict: Info: pgsql(localhost): Connected to database dovecot scanning for dovecot-acl 2012-11-28 11:10:07 dict: Error: dict sql iterate failed: Not connected to database 2012-11-28 11:10:07 IMAP(user) [23358]: Error: acl: dict iteration failed, can't update dict scanning for dovecot-acl
After that the connection is broken and I get the backtrace eventually.
Steffen Kaiser -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux)
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On Wed, 28 Nov 2012, Steffen Kaiser wrote:
with Dovecot v2.1.12 I do no get those panics anymore.
Steffen Kaiser -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux)
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Steffen Kaiser