Oracle docker image can be low on processes

Caused by: java.sql.SQLException: Listener refused the connection with the following error:

ORA-12516, TNS:listener could not find available handler with matching protocol stack

 

	at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:854)

	at oracle.jdbc.driver.PhysicalConnection.connect(PhysicalConnection.java:793)

	at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:57)

	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:747)

	at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:562)

	at org.apache.commons.dbcp2.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:55)

	at org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:355)

	at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:889)

	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:424)

	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:349)

	at org.apache.commons.dbcp2.PoolingDataSource.getConnection(PoolingDataSource.java:134)

	at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:753)

	at com.xpn.xwiki.store.DBCPConnectionProvider.getConnection(DBCPConnectionProvider.java:258)

	at org.hibernate.internal.NonContextualJdbcConnectionAccess.obtainConnection(NonContextualJdbcConnectionAccess.java:38)

	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:108)

	... 83 common frames omitted