In FUJITSU Enterprise Postgres 12 SP1, when using the Connection Manager, if the database server watchdog detects that the Connection Manager is down, it will output a message to the database server.

Incompatibilities may occur if:

1) The application server is using the Connection Manager. and

2) The database server is running the watchdog process. and

3) 1) Application server or Connection Manager goes down.

FUJITSU Enterprise Postgres 12 or earlier

If the database server watchdog detects that the Connection Manager is down, the following message is not output.

WARNING:  watchdog: error in heartbeat connection (20331): host=xxx.xxx.xxx.xxx port=xxxxx pid=xxxxx

FUJITSU Enterprise Postgres 12 SP1

If the database server watchdog detects that the Connection Manager is down, the following message may be output.

WARNING:  watchdog: error in heartbeat connection (20331): host=xxx.xxx.xxx.xxx port=xxxxx pid=xxxxx

FUJITSU Enterprise Postgres 13 or later

If the database server watchdog detects that the Connection Manager is down, the following message is not output.

WARNING:  watchdog: error in heartbeat connection (20331): host=xxx.xxx.xxx.xxx port=xxxxx pid=xxxxx

If you are monitoring the database log for watchdog messages, change the monitoring setting to one that takes into account the possible output of these messages.