[UIMA-1630] Fix IndexOutOfBounds exception in BaseAnalysisEngineController

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.3AS
• Component/s: Async Scaleout
• Assignee: Jaroslaw Cwiklik
• Reporter: Jaroslaw Cwiklik
• Created: 21/Oct/09 14:33
• Updated: 23/Oct/09 16:28
• Resolved: 23/Oct/09 16:28

Description

There seems to be a synchronization problem in BaseAnalysisEngineController leading to the exception like this:

Caused by: java.lang.IndexOutOfBoundsException: Index: 2, Size: 0
at java.util.ArrayList.RangeCheck(ArrayList.java:547)
at java.util.ArrayList.get(ArrayList.java:322)
at org.apache.uima.aae.controller.BaseAnalysisEngineController.stop(BaseAnalysisEngineController.java:1741)
at org.apache.uima.aae.controller.BaseAnalysisEngineController.stop(BaseAnalysisEngineController.java:1707)
at org.apache.uima.aae.controller.AggregateAnalysisEngineController_impl.stop(AggregateAnalysisEngineController_impl.java:2753)
at org.apache.uima.aae.controller.BaseAnalysisEngineController.terminate(BaseAnalysisEngineController.java:1967)
at org.apache.uima.aae.controller.BaseAnalysisEngineController.terminate(BaseAnalysisEngineController.java:1940)
at org.apache.uima.adapter.jms.activemq.SpringContainerDeployer.initializeContainer(SpringContainerDeployer.java:313)
at org.apache.uima.adapter.jms.activemq.SpringContainerDeployer.deploy(SpringContainerDeployer.java:390)
... 7 more

The aggregate controller attempts to stop its colocated delegates and fails with IndexOutOfBounds. It looks like one thread is trying to stop, while another is cleaning up a HashMap. Need to synchronize these activities.