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NPE randomly occurs due to missing synchronization, I have not steps to reproduce but it should be fairly simple to fix java.lang.NullPointerException at org.netbeans.modules.j2ee.deployment.impl.ui.ProgressUI.setProgressObject(ProgressUI.java:179) at org.netbeans.modules.j2ee.deployment.impl.ProgressObjectUtil.trackProgressObject(ProgressObjectUtil.java:61) at org.netbeans.modules.j2ee.deployment.impl.ServerInstance._stop(ServerInstance.java:1371) at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.stop(ServerInstance.java:965) at org.netbeans.modules.j2ee.deployment.impl.ui.actions.StopAction$1.run(StopAction.java:77) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:539) [catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:964)
TM -> 6.0
F. Checking in src/org/netbeans/modules/j2ee/deployment/impl/ui/ProgressUI.java; /cvs/j2eeserver/src/org/netbeans/modules/j2ee/deployment/impl/ui/ProgressUI.java,v <-- ProgressUI.java new revision: 1.22; previous revision: 1.21 done