Simon Willnauer created LUCENE-9363:
---------------------------------------

             Summary: TestIndexWriterDelete.testDeleteAllNoDeadLock failed on CI
                 Key: LUCENE-9363
                 URL: https://issues.apache.org/jira/browse/LUCENE-9363
             Project: Lucene - Core
          Issue Type: Improvement
            Reporter: Simon Willnauer


{noformat}
[junit4]   2> NOTE: reproduce with: ant test  -Dtestcase=TestIndexWriterDelete 
-Dtests.method=testDeleteAllNoDeadLock -Dtests.seed=7C9973DFB2835976 
-Dtests.multiplier=3 -Dtests.slow=true -Dtests.locale=ro-MD 
-Dtests.timezone=SystemV/AST4ADT -Dtests.asserts=true 
-Dtests.file.encoding=US-ASCII
   [junit4] FAILURE 0.25s J2 | TestIndexWriterDelete.testDeleteAllNoDeadLock <<<
   [junit4]    > Throwable #1: java.lang.AssertionError
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([7C9973DFB2835976:4F809CC13240E320]:0)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.abortMerges(IndexWriter.java:2497)
   [junit4]    >        at 
org.apache.lucene.index.IndexWriter.deleteAll(IndexWriter.java:2424)
   [junit4]    >        at 
org.apache.lucene.index.RandomIndexWriter.deleteAll(RandomIndexWriter.java:373)
   [junit4]    >        at 
org.apache.lucene.index.TestIndexWriterDelete.testDeleteAllNoDeadLock(TestIndexWriterDelete.java:348)
   [junit4]    >        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   [junit4]    >        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   [junit4]    >        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   [junit4]    >        at 
java.base/java.lang.reflect.Method.invoke(Method.java:564)
   [junit4]    >        at java.base/java.lang.Thread.run(Thread.java:832)
   [junit4]   2> NOTE: leaving temporary files on disk at: 
/home/jenkins/workspace/Lucene-Solr-master-Linux/lucene/build/core/test/J2/temp/lucene.index.TestIndexWriterDelete_7C9973DFB2835976-001
   [junit4]   2> NOTE: test params are: codec=Asserting(Lucene84): 
{field=TestBloomFilteredLucenePostings(BloomFilteringPostingsFormat(Lucene84)), 
city=Lucene84, 
contents=TestBloomFilteredLucenePostings(BloomFilteringPostingsFormat(Lucene84)),
 id=Lucene84, value=PostingsFormat(name=LuceneVarGapDocFreqInterval), 
content=PostingsFormat(name=LuceneVarGapDocFreqInterval)}, 
docValues:{dv=DocValuesFormat(name=Asserting)}, maxPointsInLeafNode=2033, 
maxMBSortInHeap=6.1560152382287825, 
sim=Asserting(org.apache.lucene.search.similarities.AssertingSimilarity@c9cd3c9),
 locale=ro-MD, timezone=SystemV/AST4ADT
   [junit4]   2> NOTE: Linux 5.3.0-46-generic amd64/Oracle Corporation 15-ea 
(64-bit)/cpus=16,threads=1,free=389663704,total=518979584
   [junit4]   2> NOTE: All tests run in this JVM: [TestIntroSorter, 
TestNGramPhraseQuery, TestUpgradeIndexMergePolicy, TestBasicModelIne, 
TestTragicIndexWriterDeadlock, TestSimpleExplanations, TestDirectory, 
TestSegmentToThreadMapping, TestNIOFSDirectory, TestAxiomaticF3LOG, 
TestIndexOptions, TestSpanNotQuery, TestBinaryDocument, 
TestFixedLengthBytesRefArray, TestForUtil, TestParallelLeafReader, 
TestDirectoryReader, TestBytesRef, TestLongRange, TestByteSlices, 
TestRectangle2D, TestBufferedChecksum, TestIndexOrDocValuesQuery, 
TestFilterDirectoryReader, TestSleepingLockWrapper, TestDocIdSetIterator, 
TestMultiPhraseQuery, TestSearchWithThreads, TestPointQueries, 
TestForceMergeForever, TestNewestSegment, TestCrash, TestIntSet, 
Test4GBStoredFields, TestDirectPacked, TestLiveFieldValues, 
TestTopDocsCollector, Test2BPositions, TestAtomicUpdate, 
TestFSTDirectAddressing, TestXYPointQueries, TestLatLonLineShapeQueries, 
TestStressAdvance, TestBasics, TestLucene50StoredFieldsFormat, 
TestQueryRescorer, TestConstantScoreScorer, TestAssertions, TestDemo, 
TestExternalCodecs, TestMergeSchedulerExternal, TestAnalyzerWrapper, 
TestCachingTokenFilter, TestCharArrayMap, TestCharArraySet, TestCharFilter, 
TestCharacterUtils, TestDelegatingAnalyzerWrapper, TestGraphTokenFilter, 
TestGraphTokenizers, TestReusableStringReader, TestWordlistLoader, 
TestStandardAnalyzer, TestBytesRefAttImpl, TestCharTermAttributeImpl, 
TestCodecUtil, TestCompetitiveFreqNormAccumulator, TestFastCompressionMode, 
TestFastDecompressionMode, TestHighCompressionMode, 
TestLucene60FieldInfoFormat, TestLucene60PointsFormat, 
TestLucene70SegmentInfoFormat, TestDocument, TestDoubleRange, 
TestFeatureDoubleValues, TestFeatureField, TestFeatureSort, TestField, 
TestFieldType, TestFloatRange, TestLatLonMultiPolygonShapeQueries, 
TestXYMultiLineShapeQueries, TestXYPolygonShapeQueries, TestLine2D, 
TestTessellator, TestXYCircle, TestXYPolygon, Test2BDocs, 
TestAllFilesCheckIndexHeader, TestDocInverterPerFieldErrorInfo, 
TestDocsAndPositions, TestExceedMaxTermLength, TestFieldInfos, 
TestFieldInvertState, TestFieldUpdatesBuffer, TestFlex, TestIndexWriterCommit, 
TestIndexWriterConfig, TestIndexWriterDelete]
{noformat}

I think I know what the issue is, I changed the usage of `stopMerges` in 
LUCENE-9309 which means that we can still go and register merged during 
abortMerges(). I think we need to fix the assertion to take this into account.



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