[TEZ-2405] PipelinedSorter can throw NPE with custom compartor

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 0.7.0
• Target Version/s: 0.7.0
• Hadoop Flags: Reviewed
• Assignee: Rajesh Balamohan
• Reporter: Rajesh Balamohan
• Created: 04/May/15 03:50
• Updated: 30/Jun/15 04:52
• Resolved: 04/May/15 07:09

Description

If custom comparators are used, PipelinedSorter can throw NPE depending on custom comparator implementations.

], TaskAttempt 1 failed, info=[Error: Failure while running task:java.lang.NullPointerException
	at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter$SpanIterator.compareTo(PipelinedSorter.java:837)
	at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter$SpanIterator.compareTo(PipelinedSorter.java:767)
	at java.util.PriorityQueue.siftUpComparable(PriorityQueue.java:637)
	at java.util.PriorityQueue.siftUp(PriorityQueue.java:629)
	at java.util.PriorityQueue.offer(PriorityQueue.java:329)
	at java.util.PriorityQueue.add(PriorityQueue.java:306)
	at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter$SpanMerger.add(PipelinedSorter.java:996)
	at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter$SpanMerger.next(PipelinedSorter.java:1065)
	at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter$PartitionFilter.next(PipelinedSorter.java:936)
	at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter.spill(PipelinedSorter.java:366)
	at org.apache.tez.runtime.library.common.sort.impl.PipelinedSorter.flush(PipelinedSorter.java:406)
	at org.apache.tez.runtime.library.output.OrderedPartitionedKVOutput.close(OrderedPartitionedKVOutput.java:183)
	at org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.close(LogicalIOProcessorRuntimeTask.java:355)
	at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:181)
	at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:171)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
	at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:171)
	at org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:167)
	at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)