[jira] [Created] (KAFKA-4031) Check DirectBuffer's cleaner to be not null before using

["Soumyajit Sahu (JIRA)" <ji...@apache.org>]

Soumyajit Sahu created KAFKA-4031:
-------------------------------------

             Summary: Check DirectBuffer's cleaner to be not null before using
                 Key: KAFKA-4031
                 URL: https://issues.apache.org/jira/browse/KAFKA-4031
             Project: Kafka
          Issue Type: Bug
          Components: core
    Affects Versions: 0.10.0.1
            Reporter: Soumyajit Sahu
             Fix For: 0.10.0.2


Found the following exception stack in our broker logs.
The fix should be straight forward with a null check.

[2016-08-09 17:10:24,451] WARN Error when freeing index buffer (kafka.log.OffsetIndex)
java.lang.NullPointerException
	at kafka.log.OffsetIndex.kafka$log$OffsetIndex$$forceUnmap(OffsetIndex.scala:312)
	at kafka.log.OffsetIndex$$anonfun$resize$1.apply(OffsetIndex.scala:294)
	at kafka.log.OffsetIndex$$anonfun$resize$1.apply(OffsetIndex.scala:287)
	at kafka.utils.CoreUtils$.inLock(CoreUtils.scala:231)
	at kafka.log.OffsetIndex.resize(OffsetIndex.scala:287)
	at kafka.log.Log.loadSegments(Log.scala:245)
	at kafka.log.Log.<init>(Log.scala:101)
	at kafka.log.LogManager$$anonfun$loadLogs$2$$anonfun$3$$anonfun$apply$10$$anonfun$apply$1.apply$mcV$sp(LogManager.scala:151)
	at kafka.utils.CoreUtils$$anon$1.run(CoreUtils.scala:56)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)



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