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https://issues.apache.org/jira/browse/HDFS-3830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13439043#comment-13439043
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Colin Patrick McCabe commented on HDFS-3830:
--------------------------------------------
I tested the patch by running test_libhdfs_threaded. Before doing so, I added
the jars from share/hadoop/hdfs and share/hadoop/common to my CLASSPATH. (I am
working with the tarball layout here.)
Without this patch, the test fails intermittently. The failure mode that I saw
was an exception from one thread about the FileSystem being closed (because
someone closed FileSystem shared by all threads, and it doesn't
reference-count.)
> test_libhdfs_threaded: use forceNewInstance
> -------------------------------------------
>
> Key: HDFS-3830
> URL: https://issues.apache.org/jira/browse/HDFS-3830
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: libhdfs
> Affects Versions: 2.2.0-alpha
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Priority: Minor
> Attachments: HDFS-3830.001.patch
>
>
> test_libhdfs_threaded should create new FileSystem instances with
> newInstance, to make sure that the test doesn't break because of interference
> between the different threads.
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