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https://issues.apache.org/jira/browse/HIVE-11221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15207384#comment-15207384
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Aaron Dossett commented on HIVE-11221:
--------------------------------------
[~ashishen...@gmail.com] HDP 2.3.4 does include this fix backported to 1.2.1
(https://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.3.4/bk_HDP_RelNotes/content/patch_hive.html)
We recently upgraded to 2.3.4 and concatenation is working fine so far.
> 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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