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https://issues.apache.org/jira/browse/HDFS-4178?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daryn Sharp updated HDFS-4178:
------------------------------
Resolution: Fixed
Fix Version/s: 2.0.3-alpha
3.0.0
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Yes, I have committed to trunk and branch-2. Thanks Andy! (I was under the
misimpression that fd 0-2 were reserved unless explicit opened, or that they
were redirected to /dev/null after dropping the controlling terminal)
> shell scripts should not close stderr
> -------------------------------------
>
> Key: HDFS-4178
> URL: https://issues.apache.org/jira/browse/HDFS-4178
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: scripts
> Affects Versions: 2.0.2-alpha
> Reporter: Andy Isaacson
> Assignee: Andy Isaacson
> Fix For: 3.0.0, 2.0.3-alpha
>
> Attachments: hdfs4178.txt
>
>
> The {{start-dfs.sh}} and {{stop-dfs.sh}} scripts close stderr for some
> subprocesses using the construct
> bq. {{2>&-}}
> This is dangerous because child processes started up under this scenario will
> re-use filedescriptor 2 for opened files. Since libc and many other
> codepaths assume that filedescriptor 2 can be written to in error conditions,
> this can potentially result in data corruption.
> Much better to redirect stderr using the construct {{2>/dev/null}}.
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