Today i stumbled over a bizarre problem with WLS 10.3 (i think it also applies to older versions).

weblogic.application.ModuleException:
	at weblogic.jdbc.module.JDBCModule.activate(JDBCModule.java:349)
	at weblogic.application.internal.flow.ModuleListenerInvoker.activate(ModuleListenerInvoker.java:107)
	at weblogic.application.internal.flow.DeploymentCallbackFlow$2.next(DeploymentCallbackFlow.java:411)
	at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
	at weblogic.application.internal.flow.DeploymentCallbackFlow.activate(DeploymentCallbackFlow.java:74)
	Truncated. see log file for complete stacktrace
weblogic.common.ResourceException:  is already bound
	at weblogic.jdbc.common.internal.RmiDataSource.start(RmiDataSource.java:387)
	at weblogic.jdbc.common.internal.DataSourceManager.createAndStartDataSource(DataSourceManager.java:136)
	at weblogic.jdbc.common.internal.DataSourceManager.createAndStartDataSource(DataSourceManager.java:97)
	at weblogic.jdbc.module.JDBCModule.activate(JDBCModule.java:346)
	at weblogic.application.internal.flow.ModuleListenerInvoker.activate(ModuleListenerInvoker.java:107)
	Truncated. see log file for complete stacktrace

Whaaaaat? I don’t have an ‘application’ Foo I only have a Datasource with this name… nice error message

I double checked that there is no double JNDI Name definition, checked the config files. Everything fine.
It took me quite a while to find the problem:

The JNDI Name field for the Datasource contained two linebreaks. Removed them and hoooray. Everything is back to green.