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https://issues.apache.org/jira/browse/HBASE-20774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16687155#comment-16687155
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Steve Loughran commented on HBASE-20774:
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HADOOP-14556 will add a canonical name when you turn DTs on
> FSHDFSUtils#isSameHdfs doesn't handle S3 filesystems correctly.
> ---------------------------------------------------------------
>
> Key: HBASE-20774
> URL: https://issues.apache.org/jira/browse/HBASE-20774
> Project: HBase
> Issue Type: Bug
> Components: Filesystem Integration
> Reporter: Austin Heyne
> Priority: Major
> Labels: S3, S3Native, s3
>
> FSHDFSUtils#isSameHdfs retrieves the Canonical Service Name from Hadoop to
> determine if source and destination are on the same filesystem.
> NativeS3FileSystem, S3FileSystem and presumably S3NativeFileSystem
> (com.amazon) always return null in getCanonicalServiceName() which
> incorrectly causes isSameHdfs to return false even when they could be the
> same.
> Error encountered while trying to perform bulk load from S3 to HBase on S3
> backed by the same bucket. This is causing bulk loads from S3 to copy all the
> data to the workers and back up to S3.
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