[UIMA-5118] UIMA-AS: NPE thrown when cleaning up C++ based service

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.9.0AS
• Component/s: Async Scaleout
• Assignee: Jaroslaw Cwiklik
• Reporter: Jaroslaw Cwiklik
• Created: 22/Sep/16 17:43
• Updated: 22/Sep/16 19:17
• Resolved: 22/Sep/16 19:17

Description

NPE is thrown from BaseUIMAAsynchronousEngine_impl.undeploy()

line:
((AnalysisEngineController) ctrer).getControllerLatch().release();

when a controller is an instance of UimacppServiceController. This class returns null from getControllerLatch() causing NPE in the uima-as client which tries to clean up after processing.

Add check for null before attempting call to release().