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https://issues.apache.org/jira/browse/LUCENE-9168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17022905#comment-17022905
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Ignacio Vera commented on LUCENE-9168:
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cc [~rmuir]
> Test failure after new randomized values in LuceneTestCase
> ----------------------------------------------------------
>
> Key: LUCENE-9168
> URL: https://issues.apache.org/jira/browse/LUCENE-9168
> Project: Lucene - Core
> Issue Type: Test
> Reporter: Ignacio Vera
> Priority: Major
>
> The error can be reproduced in branch_8x:
> {code:java}
> ant test -Dtestcase=TestPointValues -Dtests.method=testTieBreakByDocID
> -Dtests.seed=A7EAA3BF5766C7C0 -Dtests.slow=true -Dtests.badapples=true
> -Dtests.locale=my -Dtests.timezone=Singapore -Dtests.asserts=true
> -Dtests.file.encoding=ISO-8859-1 {code}
>
> And the error looks like:
> {code:java}
> 07:08:28 [junit4] > Caused by:
> org.apache.lucene.index.MergePolicy$MergeException:
> java.nio.file.FileSystemException:
> /var/lib/jenkins/workspace/apache+lucene-solr+branch_8x/lucene/build/core/test/J1/temp/lucene.index.TestPointValues_A7EAA3BF5766C7C0-001/tempDir-002/_bd.tip:
> Too many open files{code}
>
> I had a look into the issue and the indexWriter in the test is configured to
> buffer very few docs:
> c.setMaxBufferedDocs(TestUtil.nextInt(r, 2, 15));
>
> But the merging factor (LogMergePolicy) is too high:
> logmp.setMergeFactor(TestUtil.nextInt(r, 100, 500));
>
> The test is creating too many files and running over the limit. The last
> statement was changed in LUCENE-9157 from:
>
> logmp.setMergeFactor(TestUtil.nextInt(r, 10, 50));
>
>
>
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