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https://issues.apache.org/jira/browse/SOLR-12905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christine Poerschke resolved SOLR-12905.
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Resolution: Fixed
Fix Version/s: master (8.0)
7.6
> reproducible MultiSolrCloudTestCaseTest test failure
> ----------------------------------------------------
>
> Key: SOLR-12905
> URL: https://issues.apache.org/jira/browse/SOLR-12905
> Project: Solr
> Issue Type: Test
> Reporter: Christine Poerschke
> Assignee: Christine Poerschke
> Priority: Minor
> Fix For: 7.6, master (8.0)
>
> Attachments: SOLR-12905.patch
>
>
> We've seen a few of these in Jenkins via the dev list
> https://lists.apache.org/list.html?dev@lucene.apache.org:lte=1y:%22duplicate%20clusterId%22
> e.g.
> {code}
> FAILED:
> junit.framework.TestSuite.org.apache.solr.cloud.MultiSolrCloudTestCaseTest
> Error Message: duplicate clusterId cloud1 Stack Trace:
> java.lang.AssertionError: duplicate clusterId cloud1 at
> __randomizedtesting.SeedInfo.seed([6DADDAF691F08EF7]:0) at
> org.junit.Assert.fail(Assert.java:93) at
> org.junit.Assert.assertTrue(Assert.java:43) at
> org.junit.Assert.assertFalse(Assert.java:68) at
> org.apache.solr.cloud.MultiSolrCloudTestCase.doSetupClusters(MultiSolrCloudTestCase.java:93)
> at
> org.apache.solr.cloud.MultiSolrCloudTestCaseTest.setupClusters(MultiSolrCloudTestCaseTest.java:53)
> ...
> {code}
> With a big of digging I was able to reliably reproduce it by using
> {{-Dtests.dups=N}} (which normally runs in multiple JVMs in parallel)
> together with {{-Dtests.jvms=1}} constraint so that the tests actually run
> sequentially in one JVM i.e. altogether
> {code}
> ant test -Dtests.dups=10 -Dtests.jvms=1 -Dtestcase=MultiSolrCloudTestCaseTest
> {code}
> The fix is simple i.e. the static {{clusterId2collection}} variable needs to
> be cleared in @AfterClass as someone ([~janhoy] ?) already mentioned
> somewhere elsewhere I think.
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