[Bug 93042] Re: Postgres 8.2 on Feisty beta dies regularly
I got some IRC feedback that this patch fixed the hang, so I am closing this for now. Please cry out loudly if it happens again, then I will reopen and re-examine. Thank you! ** Changed in: postgresql-8.2 (Ubuntu) Status: Confirmed = Fix Released -- Postgres 8.2 on Feisty beta dies regularly https://bugs.launchpad.net/bugs/93042 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 93042] Re: Postgres 8.2 on Feisty beta dies regularly
It is possible that this version already fixes the deadlock. However, everyone who experienced that in the past: If the hangs do not occur any more, then the logs should reveal the underlying error condition. Please watch out for 'multiple active vacuums for index' and 'out of btvacinfo slots' error messages in the logs. postgresql-8.2 (8.2.3-2) experimental; urgency=low . * debian/control: Add Perl dependency to p-8.2-plperl, to ensure that creating plperl functions works (as opposed to plperlu, which only needs libperl). (see bug #412135) * debian/control: Do not mention nor suggest 'pgdocs' any more in p-doc's description since pgdocs is only available for 7.4. (see bug #405097) * debian/patches/04-timezone-symlinks.patch: - Use the timezone database from the system tzdata instead of shipping our own. Towards a single authoritative time zone database in Debian and Ubuntu... :) (LP: #41159) - Drop previous hardlink-to-symlink patch to zic, since that is irrelevant now. - debian/control: Add tzdata dependency. * Add debian/patches/12-vacuum-cycle-hang.patch: Properly release our semaphore lock before erroring out wit elog() to prevent deadlocks on vacuum errors. Thanks to Heikki Linnakangas! * debian/rules: Have a test suite failure fail the build again. Let's ignore the old kernels on the Debian mips[el] buildds for now. -- Postgres 8.2 on Feisty beta dies regularly https://launchpad.net/bugs/93042 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 93042] Re: Postgres 8.2 on Feisty beta dies regularly
From looking at the trace it appears that for some reason the autovacuum daemon and the create table execution create a deadlock situation. Mark will try to set autovacuum=off and see whether the hangs still happen. ** Changed in: postgresql-8.2 (Ubuntu) Status: Unconfirmed = Confirmed -- Postgres 8.2 on Feisty beta dies regularly https://launchpad.net/bugs/93042 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 93042] Re: Postgres 8.2 on Feisty beta dies regularly
** Attachment added: backtrace of postmaster http://librarian.launchpad.net/7042614/postmaster-bt.txt -- Postgres 8.2 on Feisty beta dies regularly https://launchpad.net/bugs/93042 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 93042] Re: Postgres 8.2 on Feisty beta dies regularly
http://librarian.launchpad.net/7042614/postmaster-bt.txt was the bt for the process that hanged on CREATE DATABASE. There was another fork: 16273 ?Ss 0:00 postgres: mark launchpad_ftest_template [local] startup waiting which also hanged in the semaphore: #0 0xe410 in __kernel_vsyscall () #1 0xb7c60dcb in semop () from /lib/tls/i686/cmov/libc.so.6 #2 0x081c98cc in PGSemaphoreLock (sema=0xb78dca50, interruptOK=6 '\006') at pg_sema.c:411 #3 0x081f363f in ProcSleep (locallock=0x83b5b80, lockMethodTable=0x833f76c) at proc.c:829 #4 0x081f2665 in LockAcquire (locktag=0xbfc5b414, lockmode=3, sessionLock=0 '\0', dontWait=0 '\0') at lock.c:1140 #5 0x081f0146 in LockSharedObject (classid=1262, objid=16385, objsubid=0, lockmode=3) at lmgr.c:578 #6 0x08293f28 in InitPostgres (dbname=0x83b3058 launchpad_ftest_template, username=0x83983a0 mark) at postinit.c:406 #7 0x081fd522 in PostgresMain (argc=4, argv=0x83983dc, username=0x83983a0 mark) at postgres.c:3143 #8 0x081d211a in ServerLoop () at postmaster.c:2931 #9 0x081d3034 in PostmasterMain (argc=5, argv=0x83950e0) at postmaster.c:963 #10 0x0818c745 in main (argc=5, argv=0xbfc5ca64) at main.c:188 and the autovacuum daemon as well: #1 0xb7c60dcb in semop () from /lib/tls/i686/cmov/libc.so.6 #2 0x081c98cc in PGSemaphoreLock (sema=0xb78ddc20, interruptOK=118 'v') at pg_sema.c:411 #3 0x081f553e in LWLockAcquire (lockid=BtreeVacuumLock, mode=LW_EXCLUSIVE) at lwlock.c:455 #4 0x080abe38 in _bt_end_vacuum (rel=0xb5f0b298) at nbtutils.c:1028 #5 0x080a9c68 in btbulkdelete (fcinfo=0xbfc58cd8) at nbtree.c:552 #6 0x0828b13d in FunctionCall4 (flinfo=0x8637188, arg1=3217395608, arg2=0, arg3=135662128, arg4=140545744) at fmgr.c:1206 #7 0x080a3b96 in index_bulk_delete (info=0xbfc58f98, stats=0x0, callback=0x8160a30 lazy_tid_reaped, callback_state=0x8608ed0) at indexam.c:573 #8 0x0816099f in lazy_vacuum_index (indrel=0xb5f0b298, stats=0x86092dc, vacrelstats=0x8608ed0) at vacuumlazy.c:651 #9 0x081611dd in lazy_vacuum_rel (onerel=0xb5f09ca8, vacstmt=0x8638ef8) at vacuumlazy.c:478 #10 0x0815f08b in vacuum_rel (relid=value optimized out, vacstmt=0x8638ef8, expected_relkind=114 'r') at vacuum.c:1088 #11 0x08160015 in vacuum (vacstmt=0x8638ef8, relids=0x8638f58) at vacuum.c:397 #12 0x081cc10a in AutoVacMain (argc=value optimized out, argv=value optimized out) at autovacuum.c:912 #13 0x081cc5c3 in autovac_start () at autovacuum.c:178 #14 0x081d26d0 in ServerLoop () at postmaster.c:1249 #15 0x081d3034 in PostmasterMain (argc=5, argv=0x83950e0) at postmaster.c:963 #16 0x0818c745 in main (argc=5, argv=0xbfc5ca64) at main.c:188 -- Postgres 8.2 on Feisty beta dies regularly https://launchpad.net/bugs/93042 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 93042] Re: Postgres 8.2 on Feisty beta dies regularly
From IRC debugging: - it's just the client connection that gets stuck, server continues to work on other TCP client connections - no lingering connections (TIME_WAIT/CLOSE_WAIT) - this time hanged on 'CREATE DATABASE launchpad_ftest TEMPLATE=launchpad_ftest_template ENCODING='UNICODE'' -- Postgres 8.2 on Feisty beta dies regularly https://launchpad.net/bugs/93042 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 93042] Re: Postgres 8.2 on Feisty beta dies regularly
Here is the last item in the query log at the time of the latest hang: [2007-03-17 09:23:42 GMT] [EMAIL PROTECTED] LOG: statement: COMMENT ON FUNCTION valid_regexp(text) IS 'Returns true if the input can be compiled as a regular expression.'; [2007-03-17 09:23:42 GMT] [EMAIL PROTECTED] LOG: statement: CREATE OR REPLACE FUNCTION sha1(text) RETURNS char(40) LANGUAGE plpythonu IMMUTABLE RETURNS NULL ON NULL INPUT AS $$ import sha return sha.new(args[0]).hexdigest() $$; -- Postgres 8.2 on Feisty beta dies regularly https://launchpad.net/bugs/93042 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
