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Posted to issues@trafodion.apache.org by "Selvaganesan Govindarajan (JIRA)" <ji...@apache.org> on 2017/06/19 17:59:01 UTC

[jira] [Created] (TRAFODION-2653) Sort operator loops at times

Selvaganesan Govindarajan created TRAFODION-2653:
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             Summary: Sort operator loops at times
                 Key: TRAFODION-2653
                 URL: https://issues.apache.org/jira/browse/TRAFODION-2653
             Project: Apache Trafodion
          Issue Type: Bug
          Components: sql-exe
    Affects Versions: 2.2-incubating
            Reporter: Selvaganesan Govindarajan


This issue was observed in Esgyn internal testing. When the system is heavily loaded, the scratch IOs can return EAGAIN that translates to OPERATION_NOT_COMPLETE in Sort scratch IO handling. This condition is not being handled correctly.  

Scratch IO doesn't use asynchronous IOs though the scratch file is opened in non-blocking mode.  EAGAIN is returned from these IO operations very rarely. It should be fine to open the scratch file in blocking mode to avoid this problem



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