Race condition creating S3 buffer directory for NativeS3FileSystem
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Key: HADOOP-4377
URL: https://issues.apache.org/jira/browse/HADOOP-4377
Project: Hadoop Core
Issue Type: Bug
Components: fs/s3
Affects Versions: 0.18.1
Reporter: David Phillips
The buffer directory is checked for existence, then created if it doesn't
exist. But the create can fail if the another process creates it in between.
We can fix this by checking for existence again if the create fails. I've seen
"Cannot create S3 buffer directory" occur, and this race is the most plausible
explanation.
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