My Primary performed a failover to the standby.
This is what I see in the logs:
WARNING: terminating connection because of crash of another server process
DETAIL: The postmaster has commanded this server process to roll back the current transaction and exit, because another server process exited abnormally and possibly corrupted shared memory.
HINT: In a moment you should be able to reconnect to the database and repeat your command.
[2021-05-09 05:34:21] [WARNING] unable to ping "user=octepmgr password=xxx host=10.11.1.10 dbname=repmgr port=5000 connect_timeout=5"
[2021-05-09 05:34:21] [DETAIL] PQping() returned "PQPING_NO_RESPONSE"
[2021-05-09 05:34:21] [WARNING] connection to node "octopuspg-0" (ID: 1000) lost
[2021-05-09 05:34:21] [DETAIL]
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
How can I determine what caused this?
I can see nothing in the server /var/log/messages for the crash time (the server is Debian 10)