1. PostgreSQL might have reached maximum connection count
If the product is using PostgreSQL as the backend database, please check the latest log file from the <OPM_Home>\OpManager\pgsql\data\'pg_log' for the below print.
org.postgresql.util.PSQLException: FATAL: remaining connection slots are reserved for non-replication superuser connections
If this trace is found with a recent timestamp, follow the below steps to resolve this,
- Open postgresql.conf under <OPM_Home>\OpManager\pgsql\data
- Search using the keyword max_connections
- If the line starts with # i.e. #max_connections = 100, please remove # to uncomment the line
- Increase the value from 100 to 200 i.e. max_connections = 200
- Properly restart the OpManager service