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Posted to common-issues@hadoop.apache.org by "Steve Loughran (Jira)" <ji...@apache.org> on 2024/02/28 11:45:00 UTC
[jira] [Assigned] (HADOOP-19091) Add support for Tez to MagicS3GuardCommitter
[ https://issues.apache.org/jira/browse/HADOOP-19091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Steve Loughran reassigned HADOOP-19091:
---------------------------------------
Assignee: Venkatasubrahmanian Narayanan
> Add support for Tez to MagicS3GuardCommitter
> --------------------------------------------
>
> Key: HADOOP-19091
> URL: https://issues.apache.org/jira/browse/HADOOP-19091
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs/s3
> Affects Versions: 3.4.0, 3.3.6
> Environment: Pig 17/Hive 3.1.3 with Hadoop 3.3.3 on AWS EMR 6-12.0
> Reporter: Venkatasubrahmanian Narayanan
> Assignee: Venkatasubrahmanian Narayanan
> Priority: Major
> Attachments: 0001-AWS-Hive-Changes.patch, 0002-HIVE-27698-Backport-of-HIVE-22398-Remove-legacy-code.patch, HADOOP-19091-HIVE-WIP.patch
>
>
> The MagicS3GuardCommitter assumes that the JobID of the task is the same as that of the job's application master when writing/reading the .pendingset file. This assumption is not valid when running with Tez, which creates slightly different JobIDs for tasks and the application master.
>
> While the MagicS3GuardCommitter is intended only for MRv2, it mostly works fine with an MRv1 wrapper with Hive/Pig (with some minor changes to Hive) run in MR mode. This issue only crops up when running queries with the Tez execution engine. I can upload a patch to Hive 3.1 to reproduce this error on EMR if needed.
>
> Fixing this will probably require work from both Tez and Hadoop, wanted to start a discussion here so we can figure out how exactly we go about this.
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