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https://issues.apache.org/jira/browse/HBASE-28459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang resolved HBASE-28459.
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Hadoop Flags: Reviewed
Resolution: Fixed
Pushed to all active branches.
Thanks [~ksravista] for contributing!
> HFileOutputFormat2 ClassCastException with s3 magic committer
> -------------------------------------------------------------
>
> Key: HBASE-28459
> URL: https://issues.apache.org/jira/browse/HBASE-28459
> Project: HBase
> Issue Type: Bug
> Reporter: Bryan Beaudreault
> Assignee: Sravi Kommineni
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.4.18, 2.7.0, 3.0.0-beta-2, 2.6.1, 2.5.9
>
>
> In hadoop3 there's the s3 magic committer which can speed up s3 writes
> dramatically. In HFileOutputFormat2.createRecordWriter we cast the passed in
> committer as a FileOutputCommitter. This causes a class cast exception when
> the s3 magic committer is enabled:
>
> {code:java}
> Error: java.lang.ClassCastException: class
> org.apache.hadoop.fs.s3a.commit.magic.MagicS3GuardCommitter cannot be cast to
> class org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter {code}
>
> We can cast to PathOutputCommitter instead, but its only available in
> hadoop3+. So we will need to use reflection to work around this in branch-2.
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