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https://issues.apache.org/jira/browse/LUCENE-10649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17565885#comment-17565885
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Adrien Grand commented on LUCENE-10649:
---------------------------------------

Good catch [~vigyas], it looks related indeed. The bug seems to be that 
{{ReindexingMergePolicy}} doesn't override {{findFullFlushMerges}} to wrap 
input readers, so the merged segment doesn't get fields from the parallel 
reader. Would you like to open a PR?

> Failure in TestDemoParallelLeafReader.testRandomMultipleSchemaGensSameField
> ---------------------------------------------------------------------------
>
>                 Key: LUCENE-10649
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10649
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Vigya Sharma
>            Priority: Major
>
> Failing Build Link: 
> [https://jenkins.thetaphi.de/job/Lucene-main-Linux/35617/testReport/junit/org.apache.lucene.index/TestDemoParallelLeafReader/testRandomMultipleSchemaGensSameField/]
> Repro:
> {code:java}
> gradlew test --tests 
> TestDemoParallelLeafReader.testRandomMultipleSchemaGensSameField 
> -Dtests.seed=A7496D7D3957981A -Dtests.multiplier=3 -Dtests.locale=sr-Latn-BA 
> -Dtests.timezone=Etc/GMT-7 -Dtests.asserts=true -Dtests.file.encoding=UTF-8 
> {code}
> Error:
> {code:java}
> java.lang.AssertionError: expected:<103> but was:<2147483647>
>     at 
> __randomizedtesting.SeedInfo.seed([A7496D7D3957981A:F71866BCCEA1C903]:0)
>     at org.junit.Assert.fail(Assert.java:89)
>     at org.junit.Assert.failNotEquals(Assert.java:835)
>     at org.junit.Assert.assertEquals(Assert.java:647)
>     at org.junit.Assert.assertEquals(Assert.java:633)
>     at 
> org.apache.lucene.index.TestDemoParallelLeafReader.testRandomMultipleSchemaGensSameField(TestDemoParallelLeafReader.java:1347)
>     at 
> java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
>  {code}



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