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Posted to issues@tez.apache.org by "Rajesh Balamohan (JIRA)" <ji...@apache.org> on 2015/04/03 04:08:54 UTC

[jira] [Created] (TEZ-2269) DAGAppMaster becomes unresponsive

Rajesh Balamohan created TEZ-2269:
-------------------------------------

             Summary: DAGAppMaster becomes unresponsive
                 Key: TEZ-2269
                 URL: https://issues.apache.org/jira/browse/TEZ-2269
             Project: Apache Tez
          Issue Type: Bug
    Affects Versions: 0.7.0
            Reporter: Rajesh Balamohan
         Attachments: app_master_application_1428021179455_0001_jstack.txt

Scenario:
- Run TPCH query20 @ 1 TB scale
- Tez master branch, Hive trunk
- auto-reduce parallelism is not an issue (happens with/without auto-reduce parallelism)

1 or 2 times in 10 runs, DAGAppMaster would freeze unexpectedly.  There is no pattern observed on which vertex it happens. But when this happens, only option is to kill the application.   I will attach the jstack soon, but that doesn't seem to reveal much.

Need to debug more; Creating this JIRA for tracking purposes.



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