Gabor Bota created HADOOP-16878:
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Summary: Copy command in FileUtil to LOG at warn level if the
source and destination is the same
Key: HADOOP-16878
URL: https://issues.apache.org/jira/browse/HADOOP-16878
Project: Hadoop Common
Issue Type: Improvement
Affects Versions: 3.3.0
Reporter: Gabor Bota
Assignee: Gabor Bota
We encountered an error during a test in our QE when the file destination and
source path were the same. This happened during an ADLS test, and there were no
meaningful error messages, so it was hard to find the root cause of the failure.
The error we saw was that file size has changed during the copy operation - the
new file creation in the destination, which is the same as the source, creates
a new file and sets the file length to zero. After this, getting the source
file will fail because the sile size changed during the operation.
I propose a solution to at least log in error level in the {{FileUtil}} if the
source and destination of the copy operation is the same, so debugging issues
like this will be easier in the future.
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