jojochuang commented on a change in pull request #2892:
URL: https://github.com/apache/hadoop/pull/2892#discussion_r611335147
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File path:
hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/CopyCommitter.java
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@@ -635,7 +635,10 @@ private void concatFileChunks(Configuration conf, Path
sourceFile,
++i;
}
}
+ long firstChunkLastModifiedTs = dstfs.getFileStatus(firstChunkFile)
+ .getModificationTime();
dstfs.concat(firstChunkFile, restChunkFiles);
+ dstfs.setTimes(firstChunkFile, firstChunkLastModifiedTs, -1);
Review comment:
I think you should update mtime after rename() (below) instead. The HDFS
rename updates mtime too. Not sure about other file system implementations but
it's safe to assume that being the case.
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