[jira] [Created] (HADOOP-17386) fs.s3a.buffer.dir to be under Yarn container path on yarn applications

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[jira] [Created] (HADOOP-17386) fs.s3a.buffer.dir to be under Yarn container path on yarn applications

Steve Loughran (Jira)
Steve Loughran created HADOOP-17386:
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             Summary: fs.s3a.buffer.dir to be under Yarn container path on yarn applications
                 Key: HADOOP-17386
                 URL: https://issues.apache.org/jira/browse/HADOOP-17386
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3
    Affects Versions: 3.3.0
            Reporter: Steve Loughran


# fs.s3a.buffer.dir defaults to hadoop.tmp.dir which is /tmp or similar
# we use this for storing file blocks during upload
# staging committers use it for all files in a task, which can be a lot more
# a lot of systems don't clean up /tmp until reboot -and if they stay up for a long time then they accrue files written through s3a staging committer from spark containers which fail

Fix: use ${env.LOCAL_DIRS:-${hadoop.tmp.dir}}/s3a as the option so that if env.LOCAL_DIRS is set is used over hadoop.tmp.dir. YARN-deployed apps will use that for the buffer dir. When the app container is destroyed, so is the directory.





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