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From "Mithun Radhakrishnan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-10213) MapReduce jobs using dynamic-partitioning fail on commit.
Date Fri, 03 Apr 2015 20:31:52 GMT
Mithun Radhakrishnan created HIVE-10213:
-------------------------------------------

             Summary: MapReduce jobs using dynamic-partitioning fail on commit.
                 Key: HIVE-10213
                 URL: https://issues.apache.org/jira/browse/HIVE-10213
             Project: Hive
          Issue Type: Bug
          Components: HCatalog
            Reporter: Mithun Radhakrishnan
            Assignee: Mithun Radhakrishnan


I recently ran into a problem in {{TaskCommitContextRegistry}}, when using dynamic-partitions.

Consider a MapReduce program that reads HCatRecords from a table (using HCatInputFormat),
and then writes to another table (with identical schema), using HCatOutputFormat. The Map-task
fails with the following exception:

{code}
Error: java.io.IOException: No callback registered for TaskAttemptID:attempt_1426589008676_509707_m_000000_0@hdfs://crystalmyth.myth.net:8020/user/mithunr/mythdb/target/_DYN0.6784154320609959/grid=__HIVE_DEFAULT_PARTITION__/dt=__HIVE_DEFAULT_PARTITION__
        at org.apache.hive.hcatalog.mapreduce.TaskCommitContextRegistry.commitTask(TaskCommitContextRegistry.java:56)
        at org.apache.hive.hcatalog.mapreduce.FileOutputCommitterContainer.commitTask(FileOutputCommitterContainer.java:139)
        at org.apache.hadoop.mapred.Task.commit(Task.java:1163)
        at org.apache.hadoop.mapred.Task.done(Task.java:1025)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:345)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
        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.hadoop.mapred.YarnChild.main(YarnChild.java:158)
{code}

{{TaskCommitContextRegistry::commitTask()}} uses call-backs registered from {{DynamicPartitionFileRecordWriter}}.
But in case {{HCatInputFormat}} and {{HCatOutputFormat}} are both used in the same job, the
{{DynamicPartitionFileRecordWriter}} might only be exercised in the Reducer.

I'm relaxing the IOException, and log a warning message instead of just failing.
(I'll post the fix shortly.)



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