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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have a situation where the same line of code in some cases produces a stack trace and in other cases does not. I have not been able to reproduce this in a unit test. Has anyone ever seen this?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'>I’m using this pattern: <span style='font-size:10.0pt;font-family:Consolas;color:black'> </span><span style='font-size:10.0pt;font-family:Consolas;color:teal'><</span><span style='font-size:10.0pt;font-family:Consolas;color:#3F7F7F'>pattern</span><span style='font-size:10.0pt;font-family:Consolas;color:teal'>></span><span style='font-size:10.0pt;font-family:Consolas;color:black'>%date{<u>yyyy</u>-MM-<u>dd</u> HH:mm:ss.SSS} %-6camlevel [%thread] %class.%method:%line - %message %<u>mdc</u>%n</span><span style='font-size:10.0pt;font-family:Consolas;color:teal'></</span><span style='font-size:10.0pt;font-family:Consolas;color:#3F7F7F'>pattern</span><span style='font-size:10.0pt;font-family:Consolas;color:teal'>></span><span style='font-size:10.0pt;font-family:Consolas'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Here’s the offending line of code - 581:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:Consolas;color:black'> </span><i><span style='font-size:10.0pt;font-family:Consolas;color:#0000C0'>logger</span></i><span style='font-size:10.0pt;font-family:Consolas;color:black'>.warn(</span><span style='font-size:10.0pt;font-family:Consolas'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:Consolas;color:black'> MessageFormatter.<i>format</i>(</span><span style='font-size:10.0pt;font-family:Consolas;color:#2A00FF'>"Rejecting {} due to error: "</span><span style='font-size:10.0pt;font-family:Consolas;color:black'>, object)</span><span style='font-size:10.0pt;font-family:Consolas'><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:Consolas;color:black'> .getMessage(), exc);</span><span style='font-size:10.0pt;font-family:Consolas'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>“object” is an Object and “exc” is an Exception<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Example w/o stack trace:<o:p></o:p></p><p class=MsoNormal>2012-06-06 04:10:25.616 WARN [DiameterEnfManager8] msc.rc.diameter.DiameterEnfManager.handleObject:581 - Rejecting CREATE SessionId=seagull_gx;atcaa;b;c;d Subscriber=[IMSI:xxxxxxxx, IP:yyyyyyyyyy] due to error:<o:p></o:p></p><p class=MsoNormal>java.lang.NullPointerException: null<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Example w/ stack trace:<o:p></o:p></p><p class=MsoNormal>2012-06-06 04:14:18.727 WARN [DiameterEnfManager2] msc.rc.diameter.DiameterEnfManager.handleObject:581 - Rejecting REAUTHACK SessionId=seagull_gxx;atca Subscriber=[IP:aaaaa, IMSI:zzzzzzzzzzzzzzzzz] due to error:<o:p></o:p></p><p class=MsoNormal>java.util.ConcurrentModificationException: null<o:p></o:p></p><p class=MsoNormal> at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:819) ~[na:1.7.0_02]<o:p></o:p></p><p class=MsoNormal> at java.util.ArrayList$Itr.next(ArrayList.java:791) ~[na:1.7.0_02]<o:p></o:p></p><p class=MsoNormal> at msc.rc.model.ObjectFactory.getSessionAltKeys(ObjectFactory.java:4024) ~[msc.jar:na]<o:p></o:p></p><p class=MsoNormal> at msc.rc.diameter.model.DiameterObjectFactory.saveSession(DiameterObjectFactory.java:752) ~[msc.jar:na]<o:p></o:p></p><p class=MsoNormal> at msc.rc.diameter.DiameterManager.saveSession(DiameterManager.java:595) ~[msc.jar:na]<o:p></o:p></p><p class=MsoNormal> at msc.rc.diameter.DiameterManager.handleAck(DiameterManager.java:732) ~[msc.jar:na]<o:p></o:p></p><p class=MsoNormal> at msc.rc.diameter.DiameterEnfManager.handleAck(DiameterEnfManager.java:3854) ~[msc.jar:na]<o:p></o:p></p><p class=MsoNormal> at msc.rc.diameter.DiameterEnfManager.handleObject(DiameterEnfManager.java:527) ~[msc.jar:na]<o:p></o:p></p><p class=MsoNormal> at msc.rc.framework.HandlerThreadTracker.handleObject(HandlerThreadTracker.java:51) [msc.jar:na]<o:p></o:p></p><p class=MsoNormal> at msc.rc.framework.QueueHandlerThread.run(QueueHandlerThread.java:103) [msc.jar:na]<o:p></o:p></p><p class=MsoNormal> at abc.util.thread.ManagedThread$ExceptionHandler.run(ManagedThread.java:230) [camiant-platform.jar:na]<o:p></o:p></p><p class=MsoNormal> at java.lang.Thread.run(Thread.java:722) [na:1.7.0_02]<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Dave<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>