[jira] [Created] (KARAF-5016) occasional NPE while running "log:tail" in Karaf console.

["Richard Kosegi (JIRA)" <ji...@apache.org>]

Richard Kosegi created KARAF-5016:
-------------------------------------

             Summary: occasional NPE while running "log:tail" in Karaf console.
                 Key: KARAF-5016
                 URL: https://issues.apache.org/jira/browse/KARAF-5016
             Project: Karaf
          Issue Type: Bug
          Components: karaf-core
    Affects Versions: 4.1.0
            Reporter: Richard Kosegi
            Priority: Trivial


There is occasional NPE while running "log:tail" in Karaf console.

This occurs few times per day, it has no real impact other then tailing of log is stopped (and must be restarted by CTRL+C, log:tail)

Exception in thread "pool-51-thread-1" java.lang.NullPointerException
    at org.apache.karaf.log.core.internal.layout.PatternParser$MDCPatternConverter.convert(PatternParser.java:551)
    at org.apache.karaf.log.core.internal.layout.PatternConverter.format(PatternConverter.java:63)
    at org.apache.karaf.log.core.internal.LogEventFormatterImpl.format(LogEventFormatterImpl.java:117)
    at org.apache.karaf.log.command.DisplayLog.printEvent(DisplayLog.java:121)
    at org.apache.karaf.log.command.DisplayLog.printEvent(DisplayLog.java:105)
    at org.apache.karaf.log.command.LogTail$PrintEventThread.run(LogTail.java:113)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)




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