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https://issues.apache.org/jira/browse/LUCENE-8785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16844528#comment-16844528
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Ishan Chattopadhyaya commented on LUCENE-8785:
----------------------------------------------
Updated to 8.1, thanks!
> 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: 7.7.2, 8.1, master (9.0)
>
> Time Spent: 40m
> 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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