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From Ceki Gülcü <c...@qos.ch>
Subject RE: Nested NDC output from Weblogic
Date Thu, 07 Feb 2002 23:04:56 GMT

Sorry for not looking at this earlier.

At 11:01 07.02.2002 -0700, ajack wrote:
>Ceki,
>
>You wrote...
>
> >       The NDC code is fairly well tested. The only thing I can think of is
>forgetting to pop...
>
>after I wrote:
>
> >       We had a problem like this under the Sybase app server, which  I
>reported..
>
>Which leads me to suspect you do not believe "my" problem exists. I guess
>that explains why my bug report is sitting in the bugzilla system seemingly
>untouched. ;-)
>
>Now although I respect confidence in ones code and testing, and I suspect
>this is relatively simple/straight forward (given ThreadLocal variables) so
>I'd probably stand by it also, I had one piece of evidence that led me to
>think bug. No one single thread of mine ever had *all* NDC entries in it,
>yet all entries were displayed at once. ***Never some, unless correct,
>always all, when incorrect.*** Only Log4j's NDC code (or subsequent
>layouts/appenders) could know them all...
>
>Perhaps I had some layout bug (another person worked on that) or --- as
>likely --- perhaps the socket appender or socket server (or remote
>NTAppender) somehow got confused, however I feel there is a bug in there.
>
>I've not since this lately, since all my threads (save JSPs) now do an
>NDC.clear() when they (re)start [which could lead me to say my bug, but
>again -- *all* above.] This information is just (1) to get it off my chest
>;-) and (2) for if you are sitting there idle looking for obscure possible
>bugs to find and fix. ;-)
>
>regards,
>
>Adam
>
> >-----Original Message-----
> >From: ajack [mailto:ajack@openbiz.biz]
> >Sent: 06 February 2002 16:42
> >To: 'Log4J Users List'
> >Subject: RE: Nested NDC output from Weblogic
> >
> >
> >Hi Bill,
> >
> >We had a problem like this under the Sybase app server, which I reported to
> >log4j list a month or so ago, after we'd examined our own usage of NDC
>('cos
> >were worried we were doing things wrong). After a lot of head scratching,
> >nothing seemed wrong, we finally noticed that this only happened when
> >"Thread=0" was also displayed, as if this was some special thread to log4j.
> >
> >I can not be certain (partly 'cos nobody has contacted me about the 'bug'
>or
> >'feature') but I believe that this is something inside log4j. Perhaps it is
> >a feature, it considered the thread it was initialised in to be the primary
> >thread (thread 0), but unfortunately all threads are up for grabs in some
> >implementations of an app server.
> >
> >Take a peek if it is thread-0 --- and if it is I doubt it is under your
> >control, sorry. I was using log4j 1.1.3, not sure about later versions..
> >
> >regards
> >
> >Adam
>
>
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--
Ceki Gülcü



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