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https://issues.apache.org/jira/browse/LUCENE-8785?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Simon Willnauer updated LUCENE-8785:
------------------------------------
    Fix Version/s: 7.7.1
                   master (9.0)
                   8.1
                   8.0.1

> TestIndexWriterDelete.testDeleteAllNoDeadlock failure
> -----------------------------------------------------
>
>                 Key: LUCENE-8785
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8785
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/index
>    Affects Versions: 7.6
>         Environment: OpenJDK 1.8.0_202
>            Reporter: Michael McCandless
>            Assignee: Simon Willnauer
>            Priority: Minor
>             Fix For: 7.7.1, 8.0.1, 8.1, master (9.0)
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> I was running Lucene's core tests on an {{i3.16xlarge}} EC2 instance (64 
> cores), and hit this random yet spooky failure:
> {noformat}
>    [junit4]   2> NOTE: reproduce with: ant test  
> -Dtestcase=TestIndexWriterDelete -Dtests.method=testDeleteAllNoDeadLock 
> -Dtests.seed=952BE262BA547C1 -Dtests.slow=true -Dtests.badapples=true 
> -Dtests.locale=ar-YE -Dtests.timezone=Europe/Lisbon -Dtests.as\
> serts=true -Dtests.file.encoding=US-ASCII
>    [junit4] ERROR   0.16s J3 | TestIndexWriterDelete.testDeleteAllNoDeadLock 
> <<<
>    [junit4]    > Throwable #1: 
> com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an 
> uncaught exception in thread: Thread[id=36, name=Thread-2, state=RUNNABLE, 
> group=TGRP-TestIndexWriterDelete]
>    [junit4]    >        at 
> __randomizedtesting.SeedInfo.seed([952BE262BA547C1:3A4B5138AB66FD97]:0)
>    [junit4]    > Caused by: java.lang.RuntimeException: 
> java.lang.IllegalArgumentException: field number 0 is already mapped to field 
> name "null", not "content"
>    [junit4]    >        at 
> __randomizedtesting.SeedInfo.seed([952BE262BA547C1]:0)
>    [junit4]    >        at 
> org.apache.lucene.index.TestIndexWriterDelete$1.run(TestIndexWriterDelete.java:332)
>    [junit4]    > Caused by: java.lang.IllegalArgumentException: field number 
> 0 is already mapped to field name "null", not "content"
>    [junit4]    >        at 
> org.apache.lucene.index.FieldInfos$FieldNumbers.verifyConsistent(FieldInfos.java:310)
>    [junit4]    >        at 
> org.apache.lucene.index.FieldInfos$Builder.getOrAdd(FieldInfos.java:415)
>    [junit4]    >        at 
> org.apache.lucene.index.DefaultIndexingChain.getOrAddField(DefaultIndexingChain.java:650)
>    [junit4]    >        at 
> org.apache.lucene.index.DefaultIndexingChain.processField(DefaultIndexingChain.java:428)
>    [junit4]    >        at 
> org.apache.lucene.index.DefaultIndexingChain.processDocument(DefaultIndexingChain.java:394)
>    [junit4]    >        at 
> org.apache.lucene.index.DocumentsWriterPerThread.updateDocuments(DocumentsWriterPerThread.java:297)
>    [junit4]    >        at 
> org.apache.lucene.index.DocumentsWriter.updateDocuments(DocumentsWriter.java:450)
>    [junit4]    >        at 
> org.apache.lucene.index.IndexWriter.updateDocuments(IndexWriter.java:1291)
>    [junit4]    >        at 
> org.apache.lucene.index.IndexWriter.addDocuments(IndexWriter.java:1264)
>    [junit4]    >        at 
> org.apache.lucene.index.RandomIndexWriter.addDocument(RandomIndexWriter.java:159)
>    [junit4]    >        at 
> org.apache.lucene.index.TestIndexWriterDelete$1.run(TestIndexWriterDelete.java:326){noformat}
> It does *not* reproduce unfortunately ... but maybe there is some subtle 
> thread safety issue in this code ... this is a hairy part of Lucene ;)



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