[ot] Re: Irregular error dumped to stderr without a stack trace. (SOLVED)

[Filip Hanik <de...@hanik.com>]

I love how things in a world with only 0/1 (zeros and ones) can be magic and
random :))

Filip

----- Original Message -----
From: <SM...@eschoolsolutions.com>
To: <to...@jakarta.apache.org>
Sent: Friday, September 26, 2003 12:26 PM
Subject: RE: Irregular error dumped to stderr without a stack trace.
(SOLVED)


Just an FYI.

I appear to have solved this problem - a variable was 'magically' nulling
itself when I did NOT null it at random intervals (I am suspicious of our
Garbage Collection settings right now but we shall see...)

Still doesnt explain why there was no stacktrace attached with the
printStackTrace() but oh well - cant have everything I guess!

Thanks for the help,
Steve

-----Original Message-----
From: Shapira, Yoav [mailto:Yoav.Shapira@mpi.com]
Sent: Friday, September 26, 2003 2:13 PM
To: Tomcat Users List
Subject: RE: Irregular error dumped to stderr without a stack trace.



Howdy,

>If that were the case the report should bomb out every time it was ran
on
>the same set of data - which its not :(

The above suggests a thread contention or race condition type issue.

>There is a catch in the base servlet that should throw a stack trace
for
>ANY
>error.

So it does
try {
 ...
} catch (Throwable t) {
  System.out.println(t);
  t.printStackTrace();
}

Or something similar?

Yoav Shapira

>After some more debugging, the exception is being caught by this base
>Exception catch (identified by a System.out) - but like I said, the
>stacktrace is being truncated to the first line of it for some reason.
>Normally this would provide a full stack trace.
>
>Steve
>
>-----Original Message-----
>From: Shapira, Yoav [mailto:Yoav.Shapira@mpi.com]
>Sent: Friday, September 26, 2003 1:47 PM
>To: Tomcat Users List
>Subject: RE: Irregular error dumped to stderr without a stack trace.
>
>
>
>Howdy,
>Do you use System.out/System.err to log in your app?
>
>Could it simply be an uncaught null pointer exception in your report
>generation code due to some bad data contents in the report?
>
>Yoav Shapira
>Millennium ChemInformatics
>
>
>>-----Original Message-----
>>From: SMcGarrity@eschoolsolutions.com
>>[mailto:SMcGarrity@eschoolsolutions.com]
>>Sent: Friday, September 26, 2003 1:37 PM
>>To: tomcat-user@jakarta.apache.org
>>Subject: Irregular error dumped to stderr without a stack trace.
>>
>>Hi there,
>>
>>I have spent a bit of time trying to figure out why this problem is
>>happening with no luck - so I decided to email the mailing list.
>>
>>The issue is this:
>>
>>We have a PDF reporting engine running from Tomcat 4.1.24 - in a
>Production
>>environment.
>>I have a particular report that is erroring out irregularly -
sometimes
>it
>>will run 3-4 times in a row and
>>then it will bomb out (this is after re-starting the tomcat service),
>other
>>times it will bomb out after restart
>>immediately.  The weird thing is is the error that is being dumped to
>the
>>stderr log does NOT have a stack
>>trace - it is dumping with:
>>
>>java.lang.NullPointerException
>>
>>on stderr.  This reminds me of the OutOfMemoryError which dumps
without
>a
>>stack trace, but slightly
>>less descriptive.  Is there any way to get more description on this
>>problem?
>>I have tried to up
>>the debug levels in the server.xml without any success.
>>
>>NOTE Other reports that are larger and more resource intensive are
>running
>>consistently without a hitch.
>>
>>Thanks in advance,
>>Steve
>
>
>
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