The currentContext value indicates whether the LoggerContext stored in the ThreadLocal should be used. This is usually the wrong choice which is why the value is usually set to false. Instead, the LoggerContext is located via the ClassLoaderContextSelector which finds the LoggerContext for the ClassLoader of the class that owns the Logger.
It looks to me like something is trying to log after logging has already shut down. This is causing it to retrieve the LoggerContext, which has already been stopped, and then it tries to restart it. Because the LoggerContext is normally stopped by the execution of the shutdown hook it is a very bad sign that the shutdown hook is trying to be reestablished. My guess is that Spark has its own shutdown hook and is trying to log from it after our shutdown hook has already run. When Matt wrote this code I believe he allowed for this situation but I’d really have to dig into the code more to figure out. However, I did find http://stackoverflow.com/questions/17400136/how-to-log-within-shutdown-hooks-with-log4j2 <http://stackoverflow.com/questions/17400136/how-to-log-within-shutdown-hooks-with-log4j2> which says to implement your own ShutdownCallbackRegistry. It might be a good idea to add the variation of the Shutdown registry mentioned in the article so that it can be configured. Ralph > On Jul 21, 2015, at 8:57 PM, Remko Popma <remko.po...@gmail.com> wrote: > > Looks like the context returned by > AbstractLoggerAdapter.java:102 > is the result of LogManager.getContext(someClass, false); > > The boolean "false" indicates that a different LoggerContext may be created > (and started). I suspect this is what causes the problem. > > Ralph understands this part better than me. Ralph, should the slf4j > Log4jLoggerFactory pass "false" here? The default for LogManager seems to be > "true"... > > Remko > > Sent from my iPhone > >> On 2015/07/21, at 22:58, Mikael Ståldal <mikael.stal...@magine.com> wrote: >> >> AbstractLoggerAdapter.java:102 > > --------------------------------------------------------------------- > To unsubscribe, e-mail: log4j-user-unsubscr...@logging.apache.org > For additional commands, e-mail: log4j-user-h...@logging.apache.org > >
