Check the log of the ipmserver

# tail -f /var/log/ipmserver.log

For example

Dec 12 10:49:23 ddi ipmserver[27812]: HA no replication since 89778s, checking master...
Dec 12 10:49:23 ddi ipmserver[27812]: HA master connected successully
Dec 12 10:49:33 ddi ipmserver[27812]: HA no replication since 89788s, checking master...
Dec 12 10:49:33 ddi ipmserver[27812]: HA master connected successully
Dec 12 10:49:43 ddi ipmserver[27812]: HA no replication since 89798s, checking master...
Dec 12 10:49:43 ddi ipmserver[27812]: HA master connected successully
Dec 12 10:49:53 ddi ipmserver[27812]: HA no replication since 89808s, checking master...
Dec 12 10:49:53 ddi ipmserver[27812]: HA master connected successully
Dec 12 10:50:03 ddi ipmserver[27812]: HA no replication since 89818s, checking master...
Dec 12 10:50:03 ddi ipmserver[27812]: HA master connected successully
Dec 12 10:50:13 ddi ipmserver[27812]: HA no replication since 89828s, checking master...
...

Check PostgreSQL Logs

tail -f /var/log/postgresql.log

For example

Dec 12 09:51:30 ddi-b postgres[67213]: [3-2]
Dec 12 09:51:35 ddi-b postgres[67792]: [2-1] LOG:  streaming replication successfully connected to primary
Dec 12 09:51:35 ddi-b postgres[67792]: [3-1] FATAL:  could not receive data from WAL stream: FATAL:  requested WAL segment 00000022000004A900000024 has already been removed
Dec 12 09:51:35 ddi-b postgres[67792]: [3-2]
Dec 12 09:51:40 ddi-b postgres[68449]: [2-1] LOG:  streaming replication successfully connected to primary
Dec 12 09:51:40 ddi-b postgres[68449]: [3-1] FATAL:  could not receive data from WAL stream: FATAL:  requested WAL segment 00000022000004A900000024 has already been removed
...