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https://issues.apache.org/jira/browse/LUCENE-5787?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14041264#comment-14041264
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Dawid Weiss commented on LUCENE-5787:
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I changed my mind; synthetic fields may be actually useful to capture (in case
of some awkward compiler generated stuff we do want to include these, unless
explicitly excluded).
I think Uwe's idea is better -- an annotation to exclude whatever needs to be
excluded. I'd make it more flexible by specifying a list of filter classes
(much like we do with leak thread exclusions); this allows people to write code
to exclude whatever they need.
> LuceneTestCase static leak checker interferes with Groovy unit tests
> --------------------------------------------------------------------
>
> Key: LUCENE-5787
> URL: https://issues.apache.org/jira/browse/LUCENE-5787
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 4.7, 4.8.1
> Environment: Maven 3.0.5
> JUnit 4.11
> Reporter: John Gibson
>
> {{LuceneTestCase}}'s static memory leak checker can break Groovy subclasses.
> Specifically, Groovy classes have a synthetic static member variable of type
> {{org.codehaus.groovy.reflection.ClassInfo}}. If this variable grows too
> large then LTC will fail the test. Because the variable is added by the
> Groovy runtime instead of by the developer there is no way for the developer
> to clear the field themselves.
> Also note that the static leak checker does not ignore memory held by soft or
> weak references. These should be ignored because the memory retained by such
> fields will be reclaimed instead of triggering OutOfMemoryErrors.
> Note that because LTC is a base class for Solr's testing support classes this
> also affects {{SolrTestCaseJ4}} and {{AbstractSolrTestCase}}.
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