[logback-user] Messages from multiple senders interleaved on one line

[Johan Bos]

This kind of problem could happen if you have multiple web application
loading the same logback library and obviously the same configuration file
pointing to the same file.

Both web applications would try to log to the same file at the same moment,
which would cause messages to be append to each other.

I think I got this problem, solved by either placing the logback libraries
in each application (copying), using a different config file or by either
setting up a context selector variable using JNDI, cf logback manual on the
context selection.

-----Message d'origine-----
De : logback-user-bounces at qos.ch [mailto:logback-user-bounces at qos.ch] De la
part de Ceki Gulcu
Envoyé : jeudi 1 octobre 2009 11:15
À : logback users list
Objet : Re: [logback-user] Messages from multiple senders interleaved on one
line


Hello Michael,

It's either a very serious bug in logback, or there is something else going
on, 
such as another process writing to the same file. Could you please enter a
bug 
report describing the problem? Mark the bug as critical.

Is the duplication occurring in ConsoleAppener or in RollingFileAppender?
Which 
version of logback is this?

TIA,

Michael Olson wrote:
> Hello all,
> 
> I'm new to logback, and I'm trying out a configuration that is, more or 
> less, a word-for-word transcription of an example configuration from the 
> documentation; you can view the configuration here:
> http://logback.pastebin.com/m1a6f2875
> 
> I'm having problems where I'm getting interleaved messages on a single 
> line.  I don't believe this is expected behavior, and it certainly makes 
> it harder to understand what's going on.  I've tried searching the 
> mailing list and bug list to no avail.  Here's an example from one log
file:
> 2009-09-30 15:45:31,649 [Thread-5]   INFO         CalaisSubmitter - 
> CalaisFeedSubmitter clean shutdown
> 2009-09-30 15:45:33,2302009-09-30 15:45:33,230 [ [Thread-15] INFO       
> PostItemSubmitter - Shutdown aborted queue operation
> Thread-19]                           INFO       PostItemSubmitter - 
> Shutdown aborted queue operation
> 2009-09-30 15:45:33,231 [2009-09-30 15:45:33,231Thread-17] [ INFO       
> PostItemSubmitter - Shutdown aborted queue operation
> 2009-09-30 15:45:33,231 [2009-09-30 15:45:33,231Thread-17] [Thread-21] 
> INFO       PostItemSubmitter - Shutdown aborted queue operation
> 2009-09-30 15:45:34,230 [main]       INFO                Eventweb - All 
> stopped
> 
> and here's an example from another log file:
> 2009-09-30 15:47:10,061 [Thread-5]   INFO         CalaisSubmitter - 
> CalaisFeedSubmitter clean shutdown
> 2009-09-30 15:47:11,3782009-09-30 15:47:11,378 [ [2009-09-30 
> 15:47:11,378 [Thread-15] INFO       PostItemSubmitter - Shutdown aborted 
> queue operation
> 2009-09-30 15:47:11,3782009-09-30 15:47:11,378 [ [2009-09-30 
> 15:47:11,378 [Thread-15]Thread-21]Thread-17] INFO       
> PostItemSubmitter - Shutdown aborted queue operation
> 2009-09-30 15:47:11,3782009-09-30 15:47:11,378 [ [2009-09-30 
> 15:47:11,378 [Thread-15]Thread-21] INFO       PostItemSubmitter - 
> Shutdown aborted queue operation
> 2009-09-30 15:47:11,378 [Thread-19]  INFO       PostItemSubmitter - 
> Shutdown aborted queue operation
> 2009-09-30 15:47:12,378 [main]       INFO                Eventweb - All 
> stopped
> 
> Can anyone tell me why I'm getting interleaved messages, and what I 
> might be able to do to prevent this from happening?
> 
> Thanks,
> - Michael
> 
> 
> ------------------------------------------------------------------------
> 
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-- 
Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for
Java.
http://logback.qos.ch
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