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https://issues.apache.org/jira/browse/HDFS-3054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13449025#comment-13449025
]
Hudson commented on HDFS-3054:
------------------------------
Integrated in Hadoop-Mapreduce-trunk-Commit #2709 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/2709/])
HDFS-3054. distcp -skipcrccheck has no effect. Contributed by Colin Patrick
McCabe. (Revision 1381296)
Result = FAILURE
todd : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1381296
Files :
*
/hadoop/common/trunk/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/CopyMapper.java
*
/hadoop/common/trunk/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/RetriableFileCopyCommand.java
> distcp -skipcrccheck has no effect
> ----------------------------------
>
> Key: HDFS-3054
> URL: https://issues.apache.org/jira/browse/HDFS-3054
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: tools
> Affects Versions: 0.23.2, 2.0.0-alpha, 2.0.1-alpha, 2.2.0-alpha
> Reporter: patrick white
> Assignee: Colin Patrick McCabe
> Fix For: 3.0.0, 2.2.0-alpha
>
> Attachments: HDFS-3054.002.patch, HDFS-3054.004.patch, hdfs-3054.patch
>
>
> Using distcp with '-skipcrccheck' still seems to cause CRC checksums to
> happen.
> Ran into this while debugging an issue associated with source and destination
> having different blocksizes, and not using the preserve blocksize parameter
> (-pb). In both 23.1 and 23.2 builds, trying to bypass the checksum
> verification by using the '-skipcrcrcheck' parameter had no effect, the
> distcp still failed on checksum errors.
> Test scenario to reproduce;
> do not use '-pb' and try a distcp from 20.205 (default blksize=128M) to .23
> (default blksize=256M), the distcp fails on checksum errors, which is
> expected due to checksum calculation (tiered aggregation of all blks). Trying
> the same distcp only providing '-skipcrccheck' still fails with the same
> checksum error, it is expected that checksum would now be bypassed and the
> distcp would proceed.
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