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java.lang.NullPointerException: 	at org.postgresql.Driver.parseURL(Driver.java:601)	at org.postgresql.Driver.connect(Driver.java:248)	at java.sql.DriverManager.getConnection(DriverManager.java:582)	at java.sql.DriverManager.getConnection(DriverManager.java:185)	at org.postgresql.ds.common.BaseDataSource.getConnection(BaseDataSource.java:87)	at org.postgresql.ds.common.BaseDataSource.getConnection(BaseDataSource.java:70)	at com.sun.gjc.spi.DSManagedConnectionFactory.createManagedConnection(DSManagedConnectionFactory.java:102)	at com.sun.enterprise.resource.allocator.LocalTxConnectorAllocator.createResource(LocalTxConnectorAllocator.java:72)	at com.sun.enterprise.resource.pool.ConnectionPool.createSingleResource(ConnectionPool.java:834)	at com.sun.enterprise.resource.pool.ConnectionPool.createResource(ConnectionPool.java:1087)	at com.sun.enterprise.resource.pool.datastructure.ListDataStructure.addResource(ListDataStructure.java:121)	at com.sun.enterprise.resource.pool.ConnectionPool.addResource(ConnectionPool.java:268)	at com.sun.enterprise.resource.pool.ConnectionPool.createResourceAndAddToPool(ConnectionPool.java:1381)	at com.sun.enterprise.resource.pool.ConnectionPool.createResourceAndAddToPool(ConnectionPool.java:1101)	at com.sun.enterprise.resource.pool.resizer.Resizer.ensureSteadyPool(Resizer.java:131)	at com.sun.enterprise.resource.pool.resizer.Resizer.resizePool(Resizer.java:117)	at com.sun.enterprise.resource.pool.resizer.Resizer.run(Resizer.java:90)	at java.util.TimerThread.mainLoop(Timer.java:512)	at java.util.TimerThread.run(Timer.java:462)