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https://issues.apache.org/jira/browse/SOLR-5007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16798304#comment-16798304
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Kevin Risden commented on SOLR-5007:
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Putting some notes here as I looked into this a bit more.
Hadoop `FileSystem` vs `FileContext`. `FileContext` seems to be the preferred
HDFS interaction tool. but `FileContext` doesn’t have a `close()` method so
can’t clean up any usages.
In the Solr HDFS stuff, there is a mix of `FileSystem` and `FileContext`. and
it is weird from a resource usage as to what should be used. I know all the
`FileContext` stuff leaks threads in Solr testing, but moving to `FileSystem`
isn’t an option since not all the required methods are on `FileSystem`.
I plan to try to follow up with the Hadoop ecosystem about `FileContext` and
how to properly clean up. Since right now there is no easy way :(
> TestRecoveryHdfs seems to be leaking a thread occasionally that ends up
> failing a completely different test.
> ------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-5007
> URL: https://issues.apache.org/jira/browse/SOLR-5007
> Project: Solr
> Issue Type: Test
> Components: Hadoop Integration, hdfs, Tests
> Reporter: Mark Miller
> Assignee: Kevin Risden
> Priority: Major
> Attachments: SOLR-5007.patch
>
>
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