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https://issues.apache.org/jira/browse/HADOOP-18327?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-18327:
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Target Version/s: 3.3.9 (was: 3.3.9, 3.3.4)
> Fix eval expression in hadoop-functions.sh
> ------------------------------------------
>
> Key: HADOOP-18327
> URL: https://issues.apache.org/jira/browse/HADOOP-18327
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 3.3.3
> Reporter: groot
> Assignee: groot
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> Need to fix the eval expression.
> 1. Prefix exec by eval in Hadoop bin scripts Prior to this change, if
> HADOOP_OPTS contains any arguments that include a space, the command is not
> parsed correctly. For example, if HADOOP_OPTS="...
> -XX:OnOutOfMemoryError=\"kill -9 %p\" ...", the bin/hadoop script will fail
> with the error "Unrecognized option: -9". No amount of clever escaping of the
> quotes or spaces in the "kill -9 %p" command will fix this. The only
> alternative appears to be to use 'eval'. Switching to use 'eval' *instead of*
> 'exec' also works, but it results in an intermediate bash process being left
> alive throughout the entire lifetime of the Java proces being started. Using
> 'exec' prefixed by 'eval' as has been done in this commit gets the best of
> both worlds, in that options with spaces are parsed correctly, and you don't
> end up with an intermediate bash process as the parent of the Java process.
> 2. We can replace single quote with escape-char and a double quote.
>
>
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