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Posted to dev@hbase.apache.org by "Bryan Beaudreault (Jira)" <ji...@apache.org> on 2024/03/27 12:37:00 UTC

[jira] [Created] (HBASE-28459) HFileOutputFormat2 ClassCastException with s3 magic committer

Bryan Beaudreault created HBASE-28459:
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             Summary: 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


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:
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
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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