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https://issues.apache.org/jira/browse/LUCENE-7301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15302187#comment-15302187
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Michael McCandless commented on LUCENE-7301:
--------------------------------------------
OK test fails for me:
{noformat}
1)
testSomeSortOfWeirdFlushIssue(org.apache.lucene.index.TestNumericDocValuesUpdates)
java.lang.AssertionError: expected:<30000000026> but was:<30000000015>
at
__randomizedtesting.SeedInfo.seed([CD2F76A9BDF7F337:4B62C8600B01B35]:0)
at org.junit.Assert.fail(Assert.java:93)
at org.junit.Assert.failNotEquals(Assert.java:647)
at org.junit.Assert.assertEquals(Assert.java:128)
at org.junit.Assert.assertEquals(Assert.java:147)
at
org.apache.lucene.index.TestNumericDocValuesUpdates.testSomeSortOfWeirdFlushIssue(TestNumericDocValuesUpdates.java:121)
{noformat}
It fails on both 6.x and master ... so it's not related to index sorting (this
was my first guess!).
> updateNumericDocValue mixed with updateDocument can cause data loss in some
> randomized testing
> ----------------------------------------------------------------------------------------------
>
> Key: LUCENE-7301
> URL: https://issues.apache.org/jira/browse/LUCENE-7301
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Hoss Man
> Attachments: LUCENE-7301.patch
>
>
> SOLR-5944 has been held up by a while due to some extremely rare randomized
> test failures.
> Ishan and I have been working on whitling those Solr test failures down,
> trying to create more isolated reproducable test failures, and i *think* i've
> tracked it down to a bug in IndexWriter when the client calls to
> updateDocument intermixed with calls to updateNumericDocValue *AND*
> IndexWriterConfig.setMaxBufferedDocs is very low (i suspect "how low" depends
> on the number of quantity/types of updates -- but *just* got something that
> reproduced, and haven't tried reproducing with higher values of
> maxBufferedDocs and larger sequences of updateDocument /
> updateNumericDocValue calls.
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