[jira] [Created] (TEZ-3822) Default threshold for blacklisting a node is too high

["Zhiyuan Yang (JIRA)" <ji...@apache.org>]

Zhiyuan Yang created TEZ-3822:
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             Summary: Default threshold for blacklisting a node is too high
                 Key: TEZ-3822
                 URL: https://issues.apache.org/jira/browse/TEZ-3822
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Zhiyuan Yang


By default, a task will be failed if 4 task attempts fail, which consequently fail the vertex and dag. By default, a node will be blacklisted if 10 task attempts fail on it. This number is higher than 4, so a single faulty node server can fail 4 task attempts by shuffle error, which finally fail the job, before this node is blacklisted. Even we can reschedule a task after it's blamed for input read error, we cannot avoid multiple tasks go to the same bad node and continue to cause shuffle error.



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