Hi,

I'm running log4j-1.2.15 and have a problem that I'd like to put forward to see if anyone has a solution.

I have an application that is very short lived but is run many times. It's invoked by an external scheduling and orchestration application that can only run the application by constructing a fresh JVM via JNI every time it wants to run it. The application logs using log4j and its RollingFileAppender with append=true.

The problem that I have encountered is that I have observed that sometimes the log files are getting partially wiped. I am putting this down to the fact that the JVM might be shutting down whilst the rolling activity is taking place - resulting in partially rolled files. I have tried adding a shutdown hook to invoke LogManager.shutdown() with the hope that this would block until the appenders had finished doing their work before the JVM shutdown but this doesn't appear to work. I was able to replicate this by invoking the application many times continually. It doesn't happen often (maybe 1% with my setup) - I think the conditions have to be right, i.e. start rolling just before the app shuts down.

Has anyone got any ideas, solutions or workarounds?

Many thanks,

Dave