[ 
https://issues.apache.org/jira/browse/LUCENE-7805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16019756#comment-16019756
 ] 

Steve Rowe commented on LUCENE-7805:
------------------------------------

Another reproducing failure from ASF Jenkins 
[https://builds.apache.org/job/Lucene-Solr-NightlyTests-6.6/9/] - reproduces 
for me on master:

{noformat}
   [junit4] Suite: org.apache.lucene.analysis.core.TestRandomChains
   [junit4]   2> TEST FAIL: useCharFilter=true text='<p>\\\"< 
\ud83c\udc7f\ud83c\udc50 kyxgfmsyozqzqq \u2c77\u2c7c\u2c74\u2c68 tgwqqnkz mj'
   [junit4]   2> Exception from random analyzer: 
   [junit4]   2> charfilters=
   [junit4]   2>   
org.apache.lucene.analysis.fa.PersianCharFilter(java.io.StringReader@1429de93)
   [junit4]   2>   
org.apache.lucene.analysis.pattern.PatternReplaceCharFilter(a, <HANGUL>, 
org.apache.lucene.analysis.fa.PersianCharFilter@4cf58820)
   [junit4]   2> tokenizer=
   [junit4]   2>   
org.apache.lucene.analysis.standard.UAX29URLEmailTokenizer(org.apache.lucene.util.AttributeFactory$1@c798683c)
   [junit4]   2> filters=
   [junit4]   2>   
org.apache.lucene.analysis.miscellaneous.CodepointCountFilter(ValidatingTokenFilter@25c3f003
 
term=,bytes=[],startOffset=0,endOffset=0,positionIncrement=1,positionLength=1,type=word,
 17, 31)
   [junit4]   2>   
org.apache.lucene.analysis.shingle.ShingleFilter(ValidatingTokenFilter@7611d032 
term=,bytes=[],startOffset=0,endOffset=0,positionIncrement=1,positionLength=1,type=word)
   [junit4]   2>   
org.apache.lucene.analysis.core.FlattenGraphFilter(ValidatingTokenFilter@19064e70
 
term=,bytes=[],startOffset=0,endOffset=0,positionIncrement=1,positionLength=1,type=word)
   [junit4]   2> offsetsAreCorrect=true
   [junit4]   2> NOTE: download the large Jenkins line-docs file by running 
'ant get-jenkins-line-docs' in the lucene directory.
   [junit4]   2> NOTE: reproduce with: ant test  -Dtestcase=TestRandomChains 
-Dtests.method=testRandomChainsWithLargeStrings -Dtests.seed=E35CB6A9A0ADFBB8 
-Dtests.multiplier=2 -Dtests.nightly=true -Dtests.slow=true 
-Dtests.linedocsfile=/home/jenkins/jenkins-slave/workspace/Lucene-Solr-NightlyTests-6.6/test-data/enwiki.random.lines.txt
 -Dtests.locale=es-CR -Dtests.timezone=Asia/Krasnoyarsk -Dtests.asserts=true 
-Dtests.file.encoding=UTF-8
   [junit4] FAILURE 23.5s J2 | 
TestRandomChains.testRandomChainsWithLargeStrings <<<
   [junit4]    > Throwable #1: java.lang.AssertionError: outputEndNode=3 vs 
inputTo=2
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([E35CB6A9A0ADFBB8:890709B8F9E3DB4B]:0)
   [junit4]    >        at 
org.apache.lucene.analysis.core.FlattenGraphFilter.incrementToken(FlattenGraphFilter.java:335)
   [junit4]    >        at 
org.apache.lucene.analysis.ValidatingTokenFilter.incrementToken(ValidatingTokenFilter.java:67)
   [junit4]    >        at 
org.apache.lucene.analysis.BaseTokenStreamTestCase.checkAnalysisConsistency(BaseTokenStreamTestCase.java:730)
   [junit4]    >        at 
org.apache.lucene.analysis.BaseTokenStreamTestCase.checkRandomData(BaseTokenStreamTestCase.java:641)
   [junit4]    >        at 
org.apache.lucene.analysis.BaseTokenStreamTestCase.checkRandomData(BaseTokenStreamTestCase.java:539)
   [junit4]    >        at 
org.apache.lucene.analysis.core.TestRandomChains.testRandomChainsWithLargeStrings(TestRandomChains.java:880)
[...]
   [junit4]   2> NOTE: test params are: codec=Asserting(Lucene62): 
{dummy=PostingsFormat(name=LuceneVarGapFixedInterval)}, docValues:{}, 
maxPointsInLeafNode=508, maxMBSortInHeap=7.7739547181262205, 
sim=RandomSimilarity(queryNorm=true,coord=no): {dummy=DFR I(F)B2}, 
locale=es-CR, timezone=Asia/Krasnoyarsk
   [junit4]   2> NOTE: Linux 3.13.0-88-generic amd64/Oracle Corporation 
1.8.0_121 (64-bit)/cpus=4,threads=1,free=35313576,total=261619712
{noformat}

> TestRandomChains.testRandomChainsWithLargeStrings() failures
> ------------------------------------------------------------
>
>                 Key: LUCENE-7805
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7805
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Steve Rowe
>
> My Jenkins found a reproducing master seed, looks like FlattenGraphFilter is 
> where the problem happens:
> {noformat}
> Checking out Revision 680f4d7fd378868254786107de92a894758f667c 
> (refs/remotes/origin/master)
> [...]
>    [junit4] Suite: org.apache.lucene.analysis.core.TestRandomChains
>    [junit4]   2> TEST FAIL: useCharFilter=false text='\u0003J\u522f  nwqbl  
> uwtps  ob zdyokom ){0'
>    [junit4]   2> Exception from random analyzer: 
>    [junit4]   2> charfilters=
>    [junit4]   2>   
> org.apache.lucene.analysis.charfilter.HTMLStripCharFilter(java.io.StringReader@3ab617ae,
>  [])
>    [junit4]   2>   
> org.apache.lucene.analysis.charfilter.HTMLStripCharFilter(org.apache.lucene.analysis.charfilter.HTMLStripCharFilter@23e3c717)
>    [junit4]   2> tokenizer=
>    [junit4]   2>   org.apache.lucene.analysis.ngram.NGramTokenizer(9, 43)
>    [junit4]   2> filters=
>    [junit4]   2>   
> org.apache.lucene.analysis.miscellaneous.CodepointCountFilter(ValidatingTokenFilter@6b4708ea
>  
> term=,bytes=[],startOffset=0,endOffset=0,positionIncrement=1,positionLength=1,type=word,
>  33, 44)
>    [junit4]   2>   
> org.apache.lucene.analysis.shingle.ShingleFilter(ValidatingTokenFilter@5533fb25
>  
> term=,bytes=[],startOffset=0,endOffset=0,positionIncrement=1,positionLength=1,type=word,
>  <EMAIL>)
>    [junit4]   2>   
> org.apache.lucene.analysis.core.FlattenGraphFilter(ValidatingTokenFilter@4ef4c44
>  
> term=,bytes=[],startOffset=0,endOffset=0,positionIncrement=1,positionLength=1,type=word)
>    [junit4]   2>   
> org.apache.lucene.analysis.miscellaneous.KeepWordFilter(ValidatingTokenFilter@15baa1c7
>  
> term=,bytes=[],startOffset=0,endOffset=0,positionIncrement=1,positionLength=1,type=word,
>  [akbnucwt, vrkwm, jtomhk, jxgmfalr])
>    [junit4]   2> offsetsAreCorrect=true
>    [junit4]   2> NOTE: reproduce with: ant test  -Dtestcase=TestRandomChains 
> -Dtests.method=testRandomChainsWithLargeStrings -Dtests.seed=E9460213902F2F82 
> -Dtests.slow=true -Dtests.locale=fi-FI -Dtests.timezone=Europe/Malta 
> -Dtests.asserts=true -Dtests.file.encoding=US-ASCII
>    [junit4] FAILURE 0.19s J7 | 
> TestRandomChains.testRandomChainsWithLargeStrings <<<
>    [junit4]    > Throwable #1: java.lang.AssertionError: outputEndNode=3 vs 
> inputTo=2
>    [junit4]    >      at 
> __randomizedtesting.SeedInfo.seed([E9460213902F2F82:831DBD02C9610F71]:0)
>    [junit4]    >      at 
> org.apache.lucene.analysis.core.FlattenGraphFilter.incrementToken(FlattenGraphFilter.java:335)
>    [junit4]    >      at 
> org.apache.lucene.analysis.ValidatingTokenFilter.incrementToken(ValidatingTokenFilter.java:67)
>    [junit4]    >      at 
> org.apache.lucene.analysis.FilteringTokenFilter.incrementToken(FilteringTokenFilter.java:51)
>    [junit4]    >      at 
> org.apache.lucene.analysis.ValidatingTokenFilter.incrementToken(ValidatingTokenFilter.java:67)
>    [junit4]    >      at 
> org.apache.lucene.analysis.BaseTokenStreamTestCase.checkAnalysisConsistency(BaseTokenStreamTestCase.java:731)
>    [junit4]    >      at 
> org.apache.lucene.analysis.BaseTokenStreamTestCase.checkRandomData(BaseTokenStreamTestCase.java:642)
>    [junit4]    >      at 
> org.apache.lucene.analysis.BaseTokenStreamTestCase.checkRandomData(BaseTokenStreamTestCase.java:540)
>    [junit4]    >      at 
> org.apache.lucene.analysis.core.TestRandomChains.testRandomChainsWithLargeStrings(TestRandomChains.java:880)
>    [junit4]    >      at java.lang.Thread.run(Thread.java:745)
>    [junit4]   2> NOTE: test params are: codec=Asserting(Lucene70): 
> {dummy=PostingsFormat(name=LuceneVarGapFixedInterval)}, docValues:{}, 
> maxPointsInLeafNode=807, maxMBSortInHeap=5.007333045299232, 
> sim=RandomSimilarity(queryNorm=true): {}, locale=fi-FI, timezone=Europe/Malta
>    [junit4]   2> NOTE: Linux 4.1.0-custom2-amd64 amd64/Oracle Corporation 
> 1.8.0_77 (64-bit)/cpus=16,threads=1,free=492062472,total=525336576
> {noformat}



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