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https://issues.apache.org/jira/browse/TEZ-2209?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rajesh Balamohan updated TEZ-2209:
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Attachment: TEZ-2209.4.patch
Thanks [~sseth]. Addressed the review comments in the latest patch.
Will commit it once the precommit build succeeds.
> Fix pipelined shuffle to fetch data from any one attempt
> --------------------------------------------------------
>
> Key: TEZ-2209
> URL: https://issues.apache.org/jira/browse/TEZ-2209
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Rajesh Balamohan
> Assignee: Rajesh Balamohan
> Attachments: TEZ-2209.1.patch, TEZ-2209.2.patch, TEZ-2209.3.patch,
> TEZ-2209.4.patch
>
>
> - Currently, pipelined shuffle will fail-fast the moment it receives data
> from an attempt other than 0. This was done as an add-on check to prevent
> data being copied from speculated attempts.
> - However, in some scenarios (like LLAP), it could be possible that that task
> attempt gets killed even before generating any data. In such cases, attempt
> #1 or later attempts, would generate the actual data.
> - This jira is created to allow pipelined shuffle to download data from any
> one attempt.
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