log4net With MDC is not exactly threadsafe?
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Key: LOG4NET-256
URL: https://issues.apache.org/jira/browse/LOG4NET-256
Project: Log4net
Issue Type: Bug
Components: Core
Affects Versions: 1.2.10
Environment: Windows Server 2003
Reporter: MK Pandey
Problem: We call log4net from our BizTalk 2006 orchestrations. We noticed we
were missing logging data.
Doing a simple Nunit single threaded test, we would get all logged data.
(repeatable)
In a Nunit multithreaded test, we would notice missed logged data. (repeatable)
Also, we also noticed when BizTalk Host, when we lowered the amount of active
threads down to 2 (the lowest we could go)
So, We enabled debug tracing in log4net. We also added various system.diag
eventlogwrites around different parts of our code, from where log4net was
called, and also inside our appenders.
We noticed was saw an error in the debug tracing (using debugviewer)
log4net:ERROR [EventLogAppender] Attempted to append to closed appender named
[EventLogAppender].
Also, by counting the number of eventlog entries we had from the various
points, log4net itself was not calling the appenders each time it was called to
log a message.
We seen this issue of log4net not calling the appenders, with a variety of
different appenders, like the out of the box file and eventlog appenders and
also our own msmq appender.
So log4net doesn't appear to be thread safe? Any suggestions?
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