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java.lang.NullPointerException at com.ibm.etools.references.internal.management.InternalReferenceManager.hasStar(InternalReferenceManager.java:1394) at com.ibm.etools.references.internal.management.InternalReferenceManager$ShutdownCode.call(InternalReferenceManager.java:175) at com.ibm.etools.references.internal.management.InternalReferenceManager$ShutdownCode.call(InternalReferenceManager.java:1) at java.util.concurrent.FutureTask.run(FutureTask.java:267) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1143) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:618) at java.lang.Thread.run(Thread.java:785) at com.ibm.etools.references.internal.ReferenceThreadFactrory$ReferencesThread.run(ReferenceThreadFactrory.java:37)