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https://issues.apache.org/jira/browse/HADOOP-16158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16910122#comment-16910122
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Hudson commented on HADOOP-16158:
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FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #17146 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/17146/])
HADOOP-16158. DistCp to support checksum validation when copy blocks in
(weichiu: rev c765584eb231f8482f5b90b7e8f61f9f7a931d09)
* (edit)
hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/util/DistCpUtils.java
* (edit)
hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/util/TestDistCpUtils.java
* (edit)
hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/RetriableFileCopyCommand.java
* (add)
hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/util/TestDistCpUtilsWithCombineMode.java
* (edit)
hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/CopyCommitter.java
* (edit)
hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/mapred/TestCopyCommitter.java
> DistCp to support checksum validation when copy blocks in parallel
> ------------------------------------------------------------------
>
> Key: HADOOP-16158
> URL: https://issues.apache.org/jira/browse/HADOOP-16158
> Project: Hadoop Common
> Issue Type: Improvement
> Components: tools/distcp
> Affects Versions: 3.2.0, 2.9.2, 3.0.3, 3.1.2
> Reporter: Kai Xie
> Assignee: Kai Xie
> Priority: Major
>
> Copying blocks in parallel (enabled when blocks per chunk > 0) is a great
> DistCp improvement that can hugely speed up copying big files.
> But its checksum validation is skipped, e.g. in
> `RetriableFileCopyCommand.java`
>
> {code:java}
> if (!source.isSplit()) {
> compareCheckSums(sourceFS, source.getPath(), sourceChecksum,
> targetFS, targetPath);
> }
> {code}
> and this could result in checksum/data mismatch without notifying
> developers/users (e.g. HADOOP-16049).
> I'd like to provide a patch to add the checksum validation.
>
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