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This issue was originally marked as duplicate of issue 159906, that is already resolved. This issue is still valid, so this seems to be another issue, but it might be related. Build: NetBeans IDE Dev (Build 200909230201) VM: Java HotSpot(TM) Client VM, 1.5.0_20-141, Java(TM) 2 Runtime Environment, Standard Edition, 1.5.0_20-b02-315 OS: Mac OS X, 10.5.8, i386 User Comments: masaki: After login to Kenai, just click "Online on Chat" menu iteam from chat icon on right footer. Stacktrace: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThread) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264) at java.security.AccessController.checkPermission(AccessController.java:427) at java.util.concurrent.ThreadPoolExecutor.shutdown(ThreadPoolExecutor.java:894) at java.util.concurrent.Executors$DelegatedExecutorService.shutdown(Executors.java:594) at org.jivesoftware.smack.PacketReader.shutdown(PacketReader.java:191) at org.jivesoftware.smack.XMPPConnection.shutdown(XMPPConnection.java:634)
Created attachment 88243 [details] stacktrace
seems to be specific to JDK 1.5 and Mac OS X. Can you try to reproduce it with JDK 1.6?
Yes, it's true. I can not reproduce it when I use JDK6.
Already fixed JDK bug