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https://issues.apache.org/jira/browse/HADOOP-11002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14110201#comment-14110201
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Allen Wittenauer commented on HADOOP-11002:
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After playing with this for most of today, I've come to the conclusion that
we're going to have to drop support for directories with spaces. There's
simply no, 100% reliable way to make them work with a global var like
HADOOP_OPTS without doing some really bizarre tricks that break other things.
Support for metacharacters like < is significantly more important.
> shell escapes are incompatible with previous releases
> -----------------------------------------------------
>
> Key: HADOOP-11002
> URL: https://issues.apache.org/jira/browse/HADOOP-11002
> Project: Hadoop Common
> Issue Type: Bug
> Components: scripts
> Reporter: Allen Wittenauer
> Labels: regression
>
> Post-HADOOP-9902, the following in xyz_OPTS doesn't work without being
> escaped:
> {code}
> -XX:HeapDumpPath=./java_pid_<pid>.hprof
> {code}
> This is a bit of surprising behavior to the users. The breakage is directly
> result of the code that fixes spaces in directories. Since it is much more
> likely to hit weird metacharacters in shell than have directories with
> spaces, that part of HADOOP-9902 needs to get replaced.
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