If the APM database is down, users are unable to login to the APM Workstation. During this time the EM reports warning messages such as....
[WARN] [C3P0PooledConnectionPoolManager[identityToken->2ypdyg9w1th0atn14ods58|4e375bba, dataSourceName->apmDataSource]-HelperThread-#0] [com.mchange.v2.resourcepool.BasicResourcePool] Having failed to acquire a resource, [email protected]
is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
[WARN] [CheckDatabase.Thread1] [com.mchange.v2.c3p0.impl.NewPooledConnection] [c3p0] A PooledConnection that has already signalled a Connection error is still in use!
[WARN] [CheckDatabase.Thread1] [com.mchange.v2.c3p0.impl.NewPooledConnection] [c3p0] Another error has occurred [ org.postgresql.util.PSQLException: This connection has been closed. ] which will not be reported to listeners!
This issue is encountered if the APM database goes down after the EM has started.