That's weird. Are you sure, that the NPE is thrown in that line of code and not within the get() method itself ? The later would be explained by what I found on www.dejanews.com .....
I searched for InheritableThreadLocal (the parent class of ThreadLocalMap) and NullPointerException in dejanews and found an interesting answer to your question. --------- snippet ------- Hi Johan, This is a known defect and will be fixed in the next release of the v1.3.1 IBM J9 JRE. I don't know what release of WSAD will end up using this JRE release, so all I can say for now is to disable hot-method replace (effectively disabling the J9 JVM) when you are debugging. However, if you do require a fix you could try contacting IBM support and requesting for it. - Troy -------------------------- The link to that answer is http://groups.google.com/groups?hl=de&lr=&ie=UTF-8&oe=UTF-8&threadm=3F84200E.4060207%40profitsoftware.com&rnum=1&prev=/groups%3Fq%3D%252Binheritablethreadlocal%2Bnullpointerexception%26ie%3DUTF-8%26oe%3DUTF-8%26hl%3Dde I think that answers your question (even if it does not help you very much, sorry!!) Regards Gyoergy -----Urspr�ngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Gesendet: Mittwoch, 4. Februar 2004 19:27 An: Magoss, Gyoergy; [EMAIL PROTECTED] Betreff: Re: AW: NullPointerException from MDC in IBM WSAD 5.1/WebSphere 5.0.2 From: [EMAIL PROTECTED] To: [EMAIL PROTECTED], [EMAIL PROTECTED] Date: Wed, 4 Feb 2004 10:27:28 -0800 Subject: Re: AW: NullPointerException from MDC in IBM WSAD 5.1/WebSphere 5.0.2 Thanks for the reply, Gyoergy. For debugging, i simply pointed WSAD's debugger at the source files - this allows me to step through, set breakpoints, etc. The ThreadLocalMap named tlm gets initialized in MDC's constructor, and according to the debugger is not null. Actually, in the debugger it looks the same as when i'm running in a server that allows the code to succeed. thanks again, Joe --- [EMAIL PROTECTED] wrote: > Hi, > if > Hashtable ht = (Hashtable) > ((ThreadLocalMap)tlm).get(); > throws a NPE from my point of view tlm is null. > Since you traced the code and most probably (as I > guess from the names of the variables) did a > decompile of the class (using jad, i guess), you > should find a point in the code prior to that call > where tlm is set to something. > Look for that part that is where you will find the > cause of your problem, I think. > Regards > Gyoergy > -----Urspr�ngliche Nachricht----- > Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Gesendet: Mittwoch, 4. Februar 2004 01:40 > An: [EMAIL PROTECTED] > Betreff: NullPointerException from MDC in IBM WSAD > 5.1/WebSphere 5.0.2 > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED] > Date: Tue, 3 Feb 2004 16:40:10 -0800 > Subject: NullPointerException from MDC in IBM WSAD > 5.1/WebSphere 5.0.2 > Greetings: > I'm using IBM's WSAD 5 and the embedded Websphere 5 > runtime environment. The web project in my > enterprise > app contains a servlet that uses the DOMConfigurator > to configure Log4j and then log a message that > configuration succeeded. The log4j.jar (version > 1.2.8) > is in WEB-INF/lib. > My ConversionPattern for the PatternLayout class > contains this pattern: > [USERID]%X{USERID}[MESG]%m > In WSAD 5.0.1 with Websphere 5.0.0 s0245.03, the > code > runs fine. Since my servlet code doesn't set a > "USERID" in the MDC, the output looks like this: > [USERID][MESG]Initialization successful. > However, in WSAD 5.1 (with all the latest fixpacks) > and its Websphere 5 runtime (version 5.0.2 > ptf2M0325.01), the attempt to log a message throws a > NullPointerException. i've traced the NPE to line > 118 > in the MDC code: > Hashtable ht = (Hashtable) > ((ThreadLocalMap)tlm).get(); > The call to get() throws the NPE in WSAD 5.1. In > WSAD > 5.0.x, this line executes and the following line > returns a null (as it should). It also works this > way > in WSAD 5.1 using the embedded Websphere 4 runtime. > In > searching BugZilla, i found bug # 10528, fixed in > July > 2002, which modified the code on MDC line 119 - it's > close to my problem! but trouble happens on line > 118. > Does anyone have an idea of why this might be > happening? i searched IBM's Websphere support with > no > luck, and am trying to examine what's going on in > the > classloaders to see how that might be different > between WSAD/Websphere versions. i vaguely suspect a > security problem, but it's unclear why that would > cause an NPE. > thanks in advance, > Joe > __________________________________ > Do you Yahoo!? > Yahoo! SiteBuilder - Free web site building tool. > Try it! > http://webhosting.yahoo.com/ps/sb/ --------------------------------------------------------------------- > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] __________________________________ Do you Yahoo!? Yahoo! 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