Major Description
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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