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https://issues.apache.org/jira/browse/TEZ-1635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14159414#comment-14159414
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Bikas Saha commented on TEZ-1635:
---------------------------------

[~hagleitn] this may be a hive issue. [~vikram.dixit] fixed a similar looking 
stack trace recently. the root cause was the hive processor was not starting 
all inputs before trying to read them. Thats what this stack is saying too.
{code}"TezChild" daemon prio=5 tid=7fc9ad1a6000 nid=0x112c82000 waiting on 
condition [112c80000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <7f3b53b68> (a 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1987)
        at 
org.apache.tez.runtime.InputReadyTracker$InputReadyMonitor.awaitCondition(InputReadyTracker.java:120)
        at 
org.apache.tez.runtime.InputReadyTracker.waitForAnyInputReady(InputReadyTracker.java:83)
        at 
org.apache.tez.runtime.api.impl.TezProcessorContextImpl.waitForAnyInputReady(TezProcessorContextImpl.java:104)
        at 
org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.init(MapRecordProcessor.java:161)
        at 
org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:163){code}

> Dag gets stuck intermittently
> -----------------------------
>
>                 Key: TEZ-1635
>                 URL: https://issues.apache.org/jira/browse/TEZ-1635
>             Project: Apache Tez
>          Issue Type: Bug
>    Affects Versions: 0.5.0
>            Reporter: Vikram Dixit K
>            Priority: Blocker
>         Attachments: syslog_dag_1412109415326_0002_10.gz
>
>
> Attaching logs for the dag.



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