I think the solution is pretty simple. The RoutingAppender doesn’t only work with the ThreadContext. It works using a lookup. So if you were to use a ThreadLookup that used ${{thread:id}} you would get a new Appender for each thread id. To be honest, I am not sure why we haven’t created a ThreadLookup before. I could easily see multiple places were the thread id, name, priority or ThreadGroup name might want to be used.
If you want all the threads in a “job” then I would create the parent thread with its own thread group and use the thread group name in the lookup. Ralph > On Apr 23, 2019, at 5:06 PM, Benjamin Jaton <benjamin.ja...@gmail.com> wrote: > > Hello, > > Several times I've been in a situation where in a given JVM I am trying to > run distinct jobs in separate threads, who themselves might spawn their own > threads. > In those situations I usually want the logging of each job in a separate > log file, and that has proven to be difficult. > > Log4j2 has a routing appender that allows to create a separate appender for > each job given that you can provide a routing key that's unique for each > job. But what key to use for this? > I've been using a ThreadContext variable that I set at the level of the job > thread, and any child thread that I have control over. > > But the problem is that I don't always have control over this. Sometimes > third party APIs let you feed a custom ThreadFactory, sometimes they don't. > When they don't, I can't set that ThreadContext variable and part of the > job logging will be misrouted to a different appender. > > Is there a way to work around this so that there is 1 log file for each job > that would gather all the logging of the sub threads? > > Thanks, > Benjamin --------------------------------------------------------------------- To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org For additional commands, e-mail: log4j-user-h...@logging.apache.org