Curt Arnold said on 19.2.2008 10:15:
First of all, many many thanks for your prompt responses.
On Feb 19, 2008, at 2:07 AM, Tomislav Petrović wrote:
Unfortunately it is not that simple :). MyClass instance is very much
alive :(.
Inside one of the MyClass methods, for example I have code like this:
LOG4CXX_DEBUG(logger, "log something")
simple statement (or few statements) which does not do anything with
logger
LOG4CXX_DEBUG(logger, "log something else")
Is "logger" a static class member, class member, or an local variable?
You said in your other message that would might be calling
Logger::getLogger() from many threads which would not be the case if you
were using a static class member.
logger is a class member being initialized with Logger::getLogger() in
some initialization method of class, this initialization method is
called for each class instance once in separate thread so there is
possibility that two instances have their initialization methods called
simultaneously.
So since we are using revision 474761 (sorry missed last 1 in first
post), is it possible this is related to
https://issues.apache.org/jira/browse/LOGCXX-132? In which revision
where problems described there fixed?
Don't know how cooperative your client is, but having someone being able
to reproduce the problem is key to figuring out how to avoid it. Some
possible experiments would be:
1. Attempt to substantially reduce or eliminate calls to
Logger::getLogger() on non-main threads and see if the problem goes away.
2. Update to SVN HEAD and see if the problem goes away.
3. Fabricate a test case that mimics the logging behavior of the
application and attach to a bug report. If the code can run or easily
be ported to Linux, I could run it under helgrind to check for
synchronization issues. It would also be be useful to know: does the
code fail on the client's machine with your snapshot of log4cxx and does
it fail when built with the current head.
Code fails on client machine with our snapshot (revision 474761).
I'll think about all of those possibilities and see which I can try with
the client, thanks.
--
Tomy <[EMAIL PROTECTED]>
