[logback-user] NPE in Joran

24 Sep 2013

      Hi,

we are hit by a NPE while configuring Logback. Here is the stacktrace:

java.lang.NullPointerException
     at java.io.File.<init>(Unknown Source)
     at 
ch.qos.logback.core.joran.spi.ConfigurationWatchList.convertToFile(ConfigurationWatchList.java:88)
     at 
ch.qos.logback.core.joran.spi.ConfigurationWatchList.addAsFileToWatch(ConfigurationWatchList.java:52)
     at 
ch.qos.logback.core.joran.spi.ConfigurationWatchList.setMainURL(ConfigurationWatchList.java:48)
     at 
ch.qos.logback.core.joran.util.ConfigurationWatchListUtil.setMainWatchURL(ConfigurationWatchListUtil.java:46)
     at 
ch.qos.logback.core.joran.GenericConfigurator.informContextOfURLUsedForConfiguration(GenericConfigurator.java:92)
     at 
ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:48)
     at 
com.axege.core.init.AxabasContextListener.contextInitialized(AxabasContextListener.java:48)

The code in AxabasContextListener looks like this:

URL confFile = this.getClass().getResource(logContextFilePath);

         if (confFile != null) {
             LoggerContext lc = (LoggerContext) 
LoggerFactory.getILoggerFactory();

                StatusManager statusManager = lc.getStatusManager();
                OnConsoleStatusListener onConsoleListener = new 
OnConsoleStatusListener();
                statusManager.add(onConsoleListener);
             try {
                 JoranConfigurator configurator = new JoranConfigurator();
                 configurator.setContext(lc);
                 // the context was probably already configured by 
default configuration rules
                 lc.reset();
                 configurator.doConfigure(confFile);
             } catch (JoranException je) {
                 je.printStackTrace();
             }
             StatusPrinter.printInCaseOfErrorsOrWarnings(lc);
         }

So we check if confFile exists, and it does, but we get a NPE in Joran...
The very same code works on different environments, so this is probably 
due to the specific context we are deploying in, but we can't figure it 
out...
Any help or pointer would be greatly appreciated.

Regards,

Franck

[logback-user] NPE in Joran

Franck Routier