hongbin ma created HADOOP-13179:
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Summary: TooRunner is not thread-safe because commons-cli
OptionBuilder is not thread-safe
Key: HADOOP-13179
URL: https://issues.apache.org/jira/browse/HADOOP-13179
Project: Hadoop Common
Issue Type: Bug
Reporter: hongbin ma
Priority: Minor
I'm running into similar issues like
http://stackoverflow.com/questions/22462665/is-hadoops-toorunner-thread-safe,
the author's observation seem to make sense to me. However when I checked the
hadoop github trunk I found the issue still not fixed.
Chris Nauroth further investigated this issue, here's his quote:
{quote}
The root cause is that commons-cli OptionBuilder is not thread-safe.
https://commons.apache.org/proper/commons-cli/apidocs/org/apache/commons/cl
i/OptionBuilder.html
According to this issue, commons-cli doesn't plan to change that and
instead chose to document the lack of thread-safety.
https://issues.apache.org/jira/browse/CLI-209
I think we can solve this in Hadoop, probably with a one-line change to
make GenericOptionsParser#buildGeneralOptions a synchronized method.
{quote}
I'll soon upload a patch for this
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