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https://issues.apache.org/jira/browse/PIG-4564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14553355#comment-14553355
]
Rohini Palaniswamy commented on PIG-4564:
-----------------------------------------
{code}
"TezChild" daemon prio=10 tid=0xaa753400 nid=0x5a58 waiting for monitor entry
[0xaabfe000]
java.lang.Thread.State: BLOCKED (on object monitor)
at
org.apache.pig.impl.util.SpillableMemoryManager.registerSpillable(SpillableMemoryManager.java:324)
- waiting to lock <0xb49c1e08> (a java.util.LinkedList)
at
org.apache.pig.data.DefaultAbstractBag.markSpillableIfNecessary(DefaultAbstractBag.java:129)
at
org.apache.pig.data.DefaultAbstractBag.add(DefaultAbstractBag.java:118)
at
org.apache.hive.hcatalog.pig.PigHCatUtil.transformToBag(PigHCatUtil.java:491)
at
org.apache.hive.hcatalog.pig.PigHCatUtil.extractPigObject(PigHCatUtil.java:403)
at
org.apache.hive.hcatalog.pig.PigHCatUtil.transformToTuple(PigHCatUtil.java:458)
at
org.apache.hive.hcatalog.pig.PigHCatUtil.transformToTuple(PigHCatUtil.java:376)
at
org.apache.hive.hcatalog.pig.HCatBaseLoader.getNext(HCatBaseLoader.java:64)
at org.apache.hive.hcatalog.pig.HCatLoader.getNext(HCatLoader.java:59)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigRecordReader.nextKeyValue(PigRecordReader.java:204)
at
org.apache.tez.mapreduce.lib.MRReaderMapReduce.next(MRReaderMapReduce.java:116)
at
org.apache.pig.backend.hadoop.executionengine.tez.plan.operator.POSimpleTezLoad.getNextTuple(POSimpleTezLoad.java:106)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:307)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POSplit.getNextTuple(POSplit.java:210)
at
org.apache.pig.backend.hadoop.executionengine.tez.runtime.PigProcessor.runPipeline(PigProcessor.java:317)
at
org.apache.pig.backend.hadoop.executionengine.tez.runtime.PigProcessor.run(PigProcessor.java:196)
at
org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:324)
at
org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:176)
at
org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:168)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1694)
at
org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.call(TezTaskRunner.java:168)
at
org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.call(TezTaskRunner.java:163)
"Service Thread" daemon prio=10 tid=0xacbfbc00 nid=0x59ff waiting on condition
[0xac7fc000]
java.lang.Thread.State: TIMED_WAITING (sleeping)
at java.lang.Thread.sleep(Native Method)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POPartialAgg.spill(POPartialAgg.java:602)
- locked <0xd89759d8> (a java.lang.Object)
at
org.apache.pig.impl.util.SpillableMemoryManager.handleNotification(SpillableMemoryManager.java:274)
- locked <0xb49c1e08> (a java.util.LinkedList)
at
sun.management.NotificationEmitterSupport.sendNotification(NotificationEmitterSupport.java:156)
at sun.management.MemoryImpl.createNotification(MemoryImpl.java:168)
at
sun.management.MemoryPoolImpl$PoolSensor.triggerAction(MemoryPoolImpl.java:301)
at sun.management.Sensor.trigger(Sensor.java:137)
{code}
> Pig can deadlock in POPartialAgg if there is a bag
> --------------------------------------------------
>
> Key: PIG-4564
> URL: https://issues.apache.org/jira/browse/PIG-4564
> Project: Pig
> Issue Type: Bug
> Reporter: Rohini Palaniswamy
> Assignee: Rohini Palaniswamy
> Fix For: 0.15.0
>
>
> PIG-3979 made spill of POPartialAgg synchronous, but if there is a bag in the
> data being grouped then it can deadlock when that tries to register the
> Spillable with SpillableMemoryManager.
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