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Posted to issues@tez.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2015/10/08 22:45:26 UTC

[jira] [Created] (TEZ-2872) Tez AM can be overwhelmed by TezTaskUmbilicalProtocol.getTask responses

Jason Lowe created TEZ-2872:
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             Summary: Tez AM can be overwhelmed by TezTaskUmbilicalProtocol.getTask responses
                 Key: TEZ-2872
                 URL: https://issues.apache.org/jira/browse/TEZ-2872
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Jason Lowe


When a large job runs on a large cluster with a large user payload then the AM can end up hitting OOM conditions.  For example, Pig-on-Tez can require a significant user payload (approaching 1MB) for vertices, inputs, and outputs in the DAG.  This can cause the ContainerTask response to be rather large per task, which can lead to a situation where the AM is generating output faster than the network interface can process it.  If there are enough containers asking for tasks then this leads to an OOM condition.



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