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https://issues.apache.org/jira/browse/HIVE-11221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14992094#comment-14992094
 ] 

Aaron Dossett commented on HIVE-11221:
--------------------------------------

I am seeing a different NPE when I concatenate a partition with TEZ, but trying 
the same command in MR works fine.  This was the closest JIRA I could to this 
issue.  Does anyone this this a new issue?

alter table mytable partition (partition_date='2015-10-30') concatenate;

Status: Failed
Vertex failed, vertexName=File Merge, vertexId=vertex_1446684298977_0879_1_00, 
diagnostics=[Vertex vertex_1446684298977_0879_1_00 [File Merge] killed/failed 
due to:ROOT_INPUT_INIT_FAILURE, Vertex Input: 
[hdfs://namenode/apps/hive/warehouse/mydb.db/estore/partition_date=2015-10-30] 
initializer failed, vertex=vertex_1446684298977_0879_1_00 [File Merge], 
java.lang.NullPointerException
        at 
org.apache.hadoop.hive.ql.io.HiveInputFormat.init(HiveInputFormat.java:265)
        at 
org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.getSplits(CombineHiveInputFormat.java:452)
        at 
org.apache.tez.mapreduce.hadoop.MRInputHelpers.generateOldSplits(MRInputHelpers.java:441)
        at 
org.apache.tez.mapreduce.hadoop.MRInputHelpers.generateInputSplitsToMem(MRInputHelpers.java:295)
        at 
org.apache.tez.mapreduce.common.MRInputAMSplitGenerator.initialize(MRInputAMSplitGenerator.java:124)
        at 
org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable$1.run(RootInputInitializerManager.java:245)
        at 
org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable$1.run(RootInputInitializerManager.java:239)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
        at 
org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable.call(RootInputInitializerManager.java:239)
        at 
org.apache.tez.dag.app.dag.RootInputInitializerManager$InputInitializerCallable.call(RootInputInitializerManager.java:226)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)

> In Tez mode, alter table concatenate orc files can intermittently fail with 
> NPE
> -------------------------------------------------------------------------------
>
>                 Key: HIVE-11221
>                 URL: https://issues.apache.org/jira/browse/HIVE-11221
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 1.3.0, 2.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>             Fix For: 1.3.0, 2.0.0
>
>         Attachments: HIVE-11221.1.patch
>
>
> We are not waiting for input ready events which can trigger occasional NPE if 
> input is not actually ready.
> Stacktrace:
> {code}
> java.lang.NullPointerException
>       at 
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:186)
>       at 
> org.apache.hadoop.hive.ql.exec.tez.MergeFileTezProcessor.run(MergeFileTezProcessor.java:42)
>       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$1.run(TezTaskRunner.java:168)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at javax.security.auth.Subject.doAs(Subject.java:415)
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
>       at 
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.call(TezTaskRunner.java:168)
>       at 
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.call(TezTaskRunner.java:163)
>       at java.util.concurrent.FutureTask.run(FutureTask.java:262)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.NullPointerException
>       at 
> org.apache.hadoop.hive.ql.io.HiveInputFormat.init(HiveInputFormat.java:265)
>       at 
> org.apache.hadoop.hive.ql.io.HiveInputFormat.pushProjectionsAndFilters(HiveInputFormat.java:478)
>       at 
> org.apache.hadoop.hive.ql.io.HiveInputFormat.pushProjectionsAndFilters(HiveInputFormat.java:471)
>       at 
> org.apache.hadoop.hive.ql.io.CombineHiveInputFormat.getRecordReader(CombineHiveInputFormat.java:648)
>       at 
> org.apache.tez.mapreduce.lib.MRReaderMapred.setupOldRecordReader(MRReaderMapred.java:146)
>       at 
> org.apache.tez.mapreduce.lib.MRReaderMapred.<init>(MRReaderMapred.java:73)
>       at 
> org.apache.tez.mapreduce.input.MRInput.initializeInternal(MRInput.java:483)
>       at 
> org.apache.tez.mapreduce.input.MRInputLegacy.init(MRInputLegacy.java:108)
>       at 
> org.apache.hadoop.hive.ql.exec.tez.MergeFileRecordProcessor.getMRInput(MergeFileRecordProcessor.java:220)
>       at 
> org.apache.hadoop.hive.ql.exec.tez.MergeFileRecordProcessor.init(MergeFileRecordProcessor.java:72)
>       at 
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:162)
>       ... 13 more
> {code}



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