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Posted to issues@tez.apache.org by "Jacob Tolar (JIRA)" <ji...@apache.org> on 2017/10/05 18:04:00 UTC

[jira] [Created] (TEZ-3849) PipelinedSorter silently drops records

Jacob Tolar created TEZ-3849:
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             Summary: PipelinedSorter silently drops records
                 Key: TEZ-3849
                 URL: https://issues.apache.org/jira/browse/TEZ-3849
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Jacob Tolar


This bug was introduced in https://github.com/apache/tez/commit/a47e8fcbea5eeab5a7cf812271d329524cc02dba?diff=split 

when combiner != null, the change in this commit passes kvIter with next() having already been called. This ends up (silently) dropping the first record in the partition. 

Will submit PR and attach patch. [~jeagles], not sure if this is the way you want to fix or not but it does fix my tests.



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