Amir Shenavandeh created HADOOP-16775:
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Summary: Hadoop DistCp reuses the same temp file within the task
for different files.
Key: HADOOP-16775
URL: https://issues.apache.org/jira/browse/HADOOP-16775
Project: Hadoop Common
Issue Type: Improvement
Components: tools/distcp
Affects Versions: 2.0
Reporter: Amir Shenavandeh
Hadoop DistCp reuses the same temp file name for all the files copied within
each task attempt and then moves them to the target name, which also a server
side copy. For copies over S3 this will cause inconsistency as S3 is only
consistent for read after writes, for brand new objects. There is also
inconsistency for contents of overwritten objects on S3.
To avoid this, we should randomize the temp file name.
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