Re: [JENKINS] Lucene-main-Linux (64bit/hotspot/jdk-25) - Build # 60698 - Unstable!

Hi,

it looks like this Lucene 9.5 codec fails quite often in the backwards 
codecs. Could it be that this is caused by some new additions in 
BaseKnnVectorsFormatTestCase#testRandomWithUpdatesAndGraph() which are 
not compatible to the older codec format?

Interestingly it does not fail all the time. I wonder because older 
codecs should have no write support, so how can this fail with a broken 
index if it is not created by the test?

Uwe

Am 05.12.2025 um 07:43 schrieb Policeman Jenkins Server:
> Build: https://jenkins.thetaphi.de/job/Lucene-main-Linux/60698/
> Java: 64bit/hotspot/jdk-25 -XX:-UseCompressedOops -XX:+UseSerialGC
>
> 1 tests failed.
> FAILED:  org.apache.lucene.backward_codecs.lucene95.TestLucene95HnswVectorsFormat.testRandomWithUpdatesAndGraph
>
> Error Message:
> org.apache.lucene.index.CheckIndex$CheckIndexException: Field "field" has repeated neighbors of node 107 with value 6
>
> Stack Trace:
> org.apache.lucene.index.CheckIndex$CheckIndexException: Field "field" has repeated neighbors of node 107 with value 6
> 	at __randomizedtesting.SeedInfo.seed([5EE7C436FFD326EE:203A012B48B88E8D]:0)
> 	at app/[email protected]/org.apache.lucene.index.CheckIndex.testHnswGraph(CheckIndex.java:3035)
> 	at app/[email protected]/org.apache.lucene.index.CheckIndex.testHnswGraphs(CheckIndex.java:2919)
> 	at app/[email protected]/org.apache.lucene.index.CheckIndex.testSegment(CheckIndex.java:1126)
> 	at app/[email protected]/org.apache.lucene.index.CheckIndex.checkIndex(CheckIndex.java:823)
> 	at app/[email protected]/org.apache.lucene.index.CheckIndex.checkIndex(CheckIndex.java:593)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestUtil.checkIndex(TestUtil.java:333)
> 	at app/[email protected]/org.apache.lucene.tests.store.MockDirectoryWrapper.close(MockDirectoryWrapper.java:917)
> 	at app/[email protected]/org.apache.lucene.tests.index.BaseKnnVectorsFormatTestCase.testRandomWithUpdatesAndGraph(BaseKnnVectorsFormatTestCase.java:1615)
> 	at java.base@25/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
> 	at java.base@25/java.lang.reflect.Method.invoke(Method.java:565)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1763)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:946)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:982)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:996)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:48)
> 	at app/[email protected]/org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
> 	at app/[email protected]/org.junit.rules.RunRules.evaluate(RunRules.java:20)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:843)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:490)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:955)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:840)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:891)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:902)
> 	at app/[email protected]/org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:38)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:52)
> 	at app/[email protected]/org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
> 	at app/[email protected]/org.apache.lucene.tests.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:47)
> 	at app/[email protected]/org.junit.rules.RunRules.evaluate(RunRules.java:20)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
> 	at app/[email protected]/com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
> 	at java.base@25/java.lang.Thread.run(Thread.java:1474)
>
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-- 
Uwe Schindler
Achterdiek 19, D-28357 Bremen
https://www.thetaphi.de
eMail: [email protected]