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https://issues.apache.org/jira/browse/TEZ-3822?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yingda Chen reassigned TEZ-3822:
--------------------------------
Assignee: Ying Han
> 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
> Assignee: Ying Han
> Priority: Major
>
> 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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