Ignacio Vera created LUCENE-9168:
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Summary: 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
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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