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https://issues.apache.org/jira/browse/LUCENE-9621?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Michael Froh updated LUCENE-9621:
---------------------------------
    Description: 
While implementing a test to trigger an OutOfMemoryError on flush() in 
https://github.com/apache/lucene-solr/pull/2088, I noticed that the OOME was 
followed by an assertion failure on rollback with the following stacktrace:



{code:java}
java.lang.AssertionError: pendingNumDocs 1 != 0 totalMaxDoc
        at 
__randomizedtesting.SeedInfo.seed([ABBF17C4E0FCDEE5:DDC8E99910AFC8FF]:0)
        at 
org.apache.lucene.index.IndexWriter.rollbackInternal(IndexWriter.java:2398)
        at 
org.apache.lucene.index.IndexWriter.maybeCloseOnTragicEvent(IndexWriter.java:5196)
        at 
org.apache.lucene.index.IndexWriter.tragicEvent(IndexWriter.java:5186)
        at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3932)
        at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3874)
        at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3853)
        at 
org.apache.lucene.index.TestIndexWriterDelete.testDeleteAllRepeated(TestIndexWriterDelete.java:496)
{code}



We should probably look into how exactly we behave with this kind of tragedy on 
flush().

  was:
While implementing a test to trigger an OutOfMemoryError on flush() in 
https://github.com/apache/lucene-solr/pull/2088, I noticed that the OOME was 
followed by an assertion failure on rollback with the following stacktrace:


{{java.lang.AssertionError: pendingNumDocs 1 != 0 totalMaxDoc
        at 
__randomizedtesting.SeedInfo.seed([ABBF17C4E0FCDEE5:DDC8E99910AFC8FF]:0)
        at 
org.apache.lucene.index.IndexWriter.rollbackInternal(IndexWriter.java:2398)
        at 
org.apache.lucene.index.IndexWriter.maybeCloseOnTragicEvent(IndexWriter.java:5196)
        at 
org.apache.lucene.index.IndexWriter.tragicEvent(IndexWriter.java:5186)
        at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3932)
        at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3874)
        at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3853)
        at 
org.apache.lucene.index.TestIndexWriterDelete.testDeleteAllRepeated(TestIndexWriterDelete.java:496)}}


We should probably look into how exactly we behave with this kind of tragedy on 
flush().


> pendingNumDocs doesn't match totalMaxDoc if tragedy on flush()
> --------------------------------------------------------------
>
>                 Key: LUCENE-9621
>                 URL: https://issues.apache.org/jira/browse/LUCENE-9621
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/index
>    Affects Versions: 8.6.3
>            Reporter: Michael Froh
>            Priority: Major
>
> While implementing a test to trigger an OutOfMemoryError on flush() in 
> https://github.com/apache/lucene-solr/pull/2088, I noticed that the OOME was 
> followed by an assertion failure on rollback with the following stacktrace:
> {code:java}
> java.lang.AssertionError: pendingNumDocs 1 != 0 totalMaxDoc
>       at 
> __randomizedtesting.SeedInfo.seed([ABBF17C4E0FCDEE5:DDC8E99910AFC8FF]:0)
>       at 
> org.apache.lucene.index.IndexWriter.rollbackInternal(IndexWriter.java:2398)
>       at 
> org.apache.lucene.index.IndexWriter.maybeCloseOnTragicEvent(IndexWriter.java:5196)
>       at 
> org.apache.lucene.index.IndexWriter.tragicEvent(IndexWriter.java:5186)
>       at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3932)
>       at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3874)
>       at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:3853)
>       at 
> org.apache.lucene.index.TestIndexWriterDelete.testDeleteAllRepeated(TestIndexWriterDelete.java:496)
> {code}
> We should probably look into how exactly we behave with this kind of tragedy 
> on flush().



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