How to check SUSE Manager database connection setup is correct

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Environment

SUSE Manager 3.1
SUSE Manager 3.2

Situation

The SUSE Manager installation has grown and connection limits reached messages are within the logs /var/log/rhn/... for any services connection to the database.

Example A:

2019-08-09 13:23:36,553 [salt-event-connection-watchdog] ERROR com.suse.manager.reactor.SaltReactor - Unable to connect: com.suse.salt.netapi.exception.SaltException: java.sql.SQLException: Connection Error: Connection refused: localhost/127.0.0.1:5432, retrying in 5 seconds.

Example B:

INFO   | jvm 1    | 2019/08/09 13:23:47 | Caused by: java.net.ConnectException: Connection refused (Connection refused)
INFO   | jvm 1    | 2019/08/09 13:23:47 |       at java.net.Socket.connect(Socket.java:666)
INFO   | jvm 1    | 2019/08/09 13:23:47 |       at org.postgresql.core.PGStream.<init>(PGStream.java:61)

INFO | jvm 1 | 2019/08/09 13:23:47 | at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:120)

Example C:

INFO | jvm 1 | 2019/08/09 13:39:30 | WARNING: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@5c391ca6 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:

INFO | jvm 1 | 2019/08/09 13:39:30 | org.postgresql.util.PSQLException: FATAL: sorry, too many clients already

Resolution

Running following command will show if there is any mismatch between database, apache and tomcat connection settings:

/usr/lib/susemanager/bin/susemanager-connection-check

Adjust postgresql max_connections setting in:

/var/lib/pgsql/data/postgresql.conf

Cause

Requirements for SUSE Manager have increased and settings needs to be adjusted accordingly due to growth of connected servers or increased api usage.

Disclaimer

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