Re: A failure in t/001_rep_changes.pl

On Wed, 14 Feb 2024 at 13:19, Bharath Rupireddy
<bharath(dot)rupireddyforpostgres(at)gmail(dot)com> wrote:
>
> Hi,
>
> I recently observed an assertion failure twice in t/001_rep_changes.pl
> on HEAD with the backtrace [1] on my dev EC2 c5.4xlarge instance [2].
> Unfortunately I'm not observing it again. I haven't got a chance to
> dive deep into it. However, I'm posting it here just for the records,
> and in case something can be derived out of the backtrace.
>
> [1] t/001_rep_changes.pl
>
> 2024-01-31 12:24:38.474 UTC [840166]
> pg_16435_sync_16393_7330237333761601891 STATEMENT:
> DROP_REPLICATION_SLOT pg_16435_sync_16393_7330237333761601891 WAIT
> TRAP: failed Assert("list->head != INVALID_PGPROCNO"), File:
> "../../../../src/include/storage/proclist.h", Line: 101, PID: 840166
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(ExceptionalCondition+0xbb)[0x55c8edf6b8f9]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(+0x6637de)[0x55c8edd517de]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(ConditionVariablePrepareToSleep+0x85)[0x55c8edd51b91]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(ReplicationSlotAcquire+0x142)[0x55c8edcead6b]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(ReplicationSlotDrop+0x51)[0x55c8edceb47f]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(+0x60da71)[0x55c8edcfba71]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(exec_replication_command+0x47e)[0x55c8edcfc96a]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(PostgresMain+0x7df)[0x55c8edd7d644]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(+0x5ab50c)[0x55c8edc9950c]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(+0x5aab21)[0x55c8edc98b21]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(+0x5a70de)[0x55c8edc950de]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(PostmasterMain+0x1534)[0x55c8edc949db]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(+0x459c47)[0x55c8edb47c47]
> /lib/x86_64-linux-gnu/libc.so.6(+0x29d90)[0x7f19fe629d90]
> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80)[0x7f19fe629e40]
> postgres: publisher: walsender ubuntu postgres [local]
> DROP_REPLICATION_SLOT(_start+0x25)[0x55c8ed7c4565]
> 2024-01-31 12:24:38.476 UTC [840168]
> pg_16435_sync_16390_7330237333761601891 LOG: statement: SELECT
> a.attnum, a.attname, a.atttypid, a.attnum =
> ANY(i.indkey) FROM pg_catalog.pg_attribute a LEFT JOIN
> pg_catalog.pg_index i ON (i.indexrelid =
> pg_get_replica_identity_index(16391)) WHERE a.attnum >
> 0::pg_catalog.int2 AND NOT a.attisdropped AND a.attgenerated = ''
> AND a.attrelid = 16391 ORDER BY a.attnum
>
> [2] Linux ip-000-00-0-000 6.2.0-1018-aws #18~22.04.1-Ubuntu SMP Wed
> Jan 10 22:54:16 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

By any chance do you have the log files when this failure occurred, if
so please share it.

Regards,
Vignesh