On Wed, 9 Jul 2025 at 11:43, abrahim abrahao <a_abra...@yahoo.com.br> wrote:
>
> I got error “server process was terminated by signal 11: Segmentation fault”
> using pg_create_logical_replication_slot with pgoutput plugin parameter and
> using test_decoding worked fine, any idea that is wrong?
>
> Note: I am using docker container and I also updated shm-size from 1024mb to
> 2g and I am using shared_buffers=1.5GB.
> This is a test server and there is nothing else running. IT is the first time
> I am working with logical replication.
>
> See details below
>
> postgresql.conf file:
> wal_level = logical
> max_replication_slots = 10
> max_wal_senders = 20
> listen_addresses = '*'
>
>
>
> psql -U postgres -h postgres -c "SELECT
> pg_create_logical_replication_slot('support7561_repslot', 'pgoutput');"
> SSL SYSCALL error: EOF detected
> connection to server was lost
>
>
> < 2025-07-08 14:57:08.653 UTC psql postgres postgres 172.18.0.94(53414)
> SELECT 00000 2025-07-08 14:57:07 UTC 1096 686d31c3.448 2025-07-08
> 14:57:08.653 UTC > LOG: Initializing CDC decoder
> < 2025-07-08 14:57:08.653 UTC psql postgres postgres 172.18.0.94(53414)
> SELECT 00000 2025-07-08 14:57:07 UTC 1096 686d31c3.448 2025-07-08
> 14:57:08.653 UTC > STATEMENT: SELECT
> pg_create_logical_replication_slot('support7561_repslot', 'pgoutput');
> < 2025-07-08 14:57:08.821 UTC 00000 2025-07-08 14:55:38 UTC 923
> 686d316a.39b 2025-07-08 14:57:08.821 UTC > LOG: server process (PID 1096)
> was terminated by signal 11: Segmentation fault
> < 2025-07-08 14:57:08.821 UTC 00000 2025-07-08 14:55:38 UTC 923
> 686d316a.39b 2025-07-08 14:57:08.821 UTC > DETAIL: Failed process was
> running: SELECT pg_create_logical_replication_slot('support7561_repslot',
> 'pgoutput');
> < 2025-07-08 14:57:08.821 UTC 00000 2025-07-08 14:55:38 UTC 923
> 686d316a.39b 2025-07-08 14:57:08.821 UTC > LOG: terminating any other active
> server processes
> < 2025-07-08 14:57:08.829 UTC 00000 2025-07-08 14:55:38 UTC 923
> 686d316a.39b 2025-07-08 14:57:08.829 UTC > LOG: all server processes
> terminated; reinitializing
> < 2025-07-08 14:57:09.215 UTC 00000 2025-07-08 14:57:09 UTC 1098
> 686d31c5.44a 2025-07-08 14:57:09.215 UTC > LOG: database system was
> interrupted; last known up at 2025-07-08 14:55:39 UTC
> < 2025-07-08 14:57:10.037 UTC [unknown] postgres postgres 172.18.0.217(33506)
> 57P03 2025-07-08 14:57:10 UTC 1101 686d31c6.44d 2025-07-08 14:57:10.037 UTC
> > FATAL: the database system is in recovery mode
> < 2025-07-08 14:57:10.437 UTC 00000 2025-07-08 14:57:09 UTC 1098
> 686d31c5.44a 2025-07-08 14:57:10.437 UTC > LOG: database system was not
> properly shut down; automatic recovery in progress
> < 2025-07-08 14:57:10.450 UTC 00000 2025-07-08 14:57:09 UTC 1098
> 686d31c5.44a 2025-07-08 14:57:10.450 UTC > LOG: redo starts at 1FB9/C0000A0
> < 2025-07-08 14:57:10.456 UTC 00000 2025-07-08 14:57:09 UTC 1098
> 686d31c5.44a 2025-07-08 14:57:10.456 UTC > LOG: invalid record length at
> 1FB9/C054DF8: wanted 24, got 0
> < 2025-07-08 14:57:10.456 UTC 00000 2025-07-08 14:57:09 UTC 1098
> 686d31c5.44a 2025-07-08 14:57:10.456 UTC > LOG: redo done at 1FB9/C054DC0
> system usage: CPU: user: 0.00 s, system: 0.00 s, elapsed: 0.00 s
> < 2025-07-08 14:57:10.475 UTC 00000 2025-07-08 14:57:09 UTC 1099
> 686d31c5.44b 2025-07-08 14:57:10.475 UTC > LOG: checkpoint starting:
> end-of-recovery immediate wait
> < 2025-07-08 14:57:10.501 UTC 00000 2025-07-08 14:57:09 UTC 1099
> 686d31c5.44b 2025-07-08 14:57:10.501 UTC > LOG: checkpoint complete: wrote
> 86 buffers (0.0%); 0 WAL file(s) added, 0 removed, 2 recycled; write=0.010 s,
> sync=0.007 s, total=0.028 s; sync files=18, longest=0.003 s, average=0.001 s;
> distance=339 kB, estimate=339 kB
> < 2025-07-08 14:57:10.510 UTC 00000 2025-07-08 14:55:38 UTC 923
> 686d316a.39b 2025-07-08 14:57:10.510 UTC > LOG: database system is ready to
> accept connections
>
>
> psql -U postgres -h postgres -c "SELECT
> pg_create_logical_replication_slot('support7561_repslot', 'test_decoding');"
> pg_create_logical_replication_slot
> ------------------------------------
> (support7561_repslot,1FB9/C081668)
> (1 row)
>
> postgres@support7560_postgres:/var/lib/postgresql/15/main$ psql -U postgres
> -h postgres -c "SELECT slot_name, plugin, slot_type, database, active,
> restart_lsn, confirmed_flush_lsn FROM pg_replication_slots;"
> slot_name | plugin | slot_type | database | active |
> restart_lsn | confirmed_flush_lsn
> ---------------------+---------------+-----------+----------+--------+--------------+---------------------
> support7561_repslot | test_decoding | logical | postgres | f |
> 1FB9/C081630 | 1FB9/C081668
>
>
> SHOW shared_buffers;
> shared_buffers
> ----------------
> 1532512kB
> (1 row)
>
> postgres=# \! uname -a
> Linux support7560_postgres 6.8.0-1030-gcp #32~22.04.1-Ubuntu SMP Tue Apr 29
> 23:17:09 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
>
> psql -U postgres -h postgres -c "select version()"
> version
> -------------------------------------------------------------------------------------------------------------------------------------
> PostgreSQL 15.13 (Ubuntu 15.13-1.pgdg24.04+1) on x86_64-pc-linux-gnu,
> compiled by gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0, 64-bit
Hi Abrahim,
Can you also share the stack trace for the crash?
Also can you share the exact steps used to reproduce the issue?
Thanks and Regards,
Shlok Kyal
