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https://issues.apache.org/jira/browse/LUCENE-6335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14346470#comment-14346470
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Robert Muir commented on LUCENE-6335:
-------------------------------------
A lot of the hacky stuff was to get something useful enough to track down the
leak. It makes the code ugly to print
"WeakReference<HashMap<?,Analyzer$TokenStreamComponents>>" but this is much
more useful than just "java.lang.ref.WeakReference"
> fail tests on threadlocal leaks
> -------------------------------
>
> Key: LUCENE-6335
> URL: https://issues.apache.org/jira/browse/LUCENE-6335
> Project: Lucene - Core
> Issue Type: Test
> Reporter: Robert Muir
> Attachments: LUCENE-6335.patch
>
>
> I know this requires us to do things like close our Analyzers in tests, but I
> think we should do it. just experimenting i found other leaks, e.g. in
> LineFileDocs.
> {noformat}
> [junit4] ERROR 0.00s J0 | TestForceMergeForever (suite) <<<
> [junit4] > Throwable #1: java.lang.IllegalStateException: ThreadLocal
> leaks were found:
> [junit4] > 1.
> thread=SUITE-TestForceMergeForever-seed#[AF7141C55A57350E]-worker
> value=WeakReference<HashMap<?,Analyzer$TokenStreamComponents>>
> [junit4] > 2.
> thread=SUITE-TestForceMergeForever-seed#[AF7141C55A57350E]-worker
> value=LineFileDocs$DocState
> {noformat}
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