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https://issues.apache.org/jira/browse/HBASE-21381?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Yu reassigned HBASE-21381:
------------------------------
Assignee: (was: Ted Yu)
> Document the hadoop versions using which backup and restore feature works
> -------------------------------------------------------------------------
>
> Key: HBASE-21381
> URL: https://issues.apache.org/jira/browse/HBASE-21381
> Project: HBase
> Issue Type: Task
> Reporter: Ted Yu
> Priority: Major
>
> HADOOP-15850 fixes a bug where CopyCommitter#concatFileChunks unconditionally
> tried to concatenate the files being DistCp'ed to target cluster (though the
> files are independent).
> Following is the log snippet of the failed concatenation attempt:
> {code}
> 2018-10-13 14:09:25,351 WARN [Thread-936] mapred.LocalJobRunner$Job(590):
> job_local1795473782_0004
> java.io.IOException: Inconsistent sequence file: current chunk file
> org.apache.hadoop.tools.CopyListingFileStatus@bb8826ee{hdfs://localhost:42796/user/hbase/test-data/
>
> 160aeab5-6bca-9f87-465e-2517a0c43119/data/default/test-1539439707496/96b5a3613d52f4df1ba87a1cef20684c/f/a7599081e835440eb7bf0dd3ef4fd7a5_SeqId_205_
> length = 5100 aclEntries = null, xAttrs = null} doesnt match prior entry
> org.apache.hadoop.tools.CopyListingFileStatus@243d544d{hdfs://localhost:42796/user/hbase/test-data/160aeab5-6bca-9f87-465e-
>
> 2517a0c43119/data/default/test-1539439707496/96b5a3613d52f4df1ba87a1cef20684c/f/394e6d39a9b94b148b9089c4fb967aad_SeqId_205_
> length = 5142 aclEntries = null, xAttrs = null}
> at
> org.apache.hadoop.tools.mapred.CopyCommitter.concatFileChunks(CopyCommitter.java:276)
> at
> org.apache.hadoop.tools.mapred.CopyCommitter.commitJob(CopyCommitter.java:100)
> at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:567)
> {code}
> Backup and Restore uses DistCp to transfer files between clusters.
> Without the fix from HADOOP-15850, the transfer would fail.
> This issue is to document the hadoop versions which contain HADOOP-15850 so
> that user of Backup and Restore feature knows which hadoop versions they can
> use.
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