Description of problem:
There is query to determine which schedules do not have baselines. This is executed as a native, SQL query. The method MeasurementBaselineManagerBean.getSchedulesWithoutBaselines() obtains a JDBC connection to execute the query but fails to close it. I saw the following errors in my server.log after it was running for a few days.

12:38:29,277 WARN  [org.jboss.jca.core.connectionmanager.pool.strategy.PoolBySubject] (EJB default - 1) IJ000604: Throwable while attempting to get a new connection: null: javax.resource.ResourceException: Could not create connection
        at org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.getXAManagedConnection(XAManagedConnectionFactory.java:458)
        at org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.createManagedConnection(XAManagedConnectionFactory.java:395)
        at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.createConnectionEventListener(SemaphoreArrayListManagedConnectionPool.java:782)
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Caused by: org.postgresql.util.PSQLException: FATAL: connection limit exceeded for non-superusers
        at org.postgresql.core.v3.ConnectionFactoryImpl.readStartupMessages(ConnectionFactoryImpl.java:572)
        at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:177)
        at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:64)
        at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:136)
        at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:29)
        at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:21)
        at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:31)
        at org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)
        at org.postgresql.Driver.makeConnection(Driver.java:393)
        at org.postgresql.Driver.connect(Driver.java:267)
        at java.sql.DriverManager.getConnection(DriverManager.java:620) [rt.jar:1.6.0_24]
        at java.sql.DriverManager.getConnection(DriverManager.java:200) [rt.jar:1.6.0_24]
        at org.postgresql.ds.common.BaseDataSource.getConnection(BaseDataSource.java:95)
        at org.postgresql.xa.jdbc3.AbstractJdbc3XADataSource.getXAConnection(AbstractJdbc3XADataSource.java:54)
        at org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.getXAManagedConnection(XAManagedConnectionFactory.java:441)
        ... 284 more


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