[ 
https://issues.apache.org/jira/browse/SOLR-11974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16362268#comment-16362268
 ] 

Joel Bernstein commented on SOLR-11974:
---------------------------------------

I was surprised to see that we have test case that involved Grouping with the 
CollapsingQParserPlugin. The CollapsingQParserPlugin really should only be used 
with results that have not already been collapsed or grouped.

> TestCollapseQParserPlugin.testStringCollapse() failure
> ------------------------------------------------------
>
>                 Key: SOLR-11974
>                 URL: https://issues.apache.org/jira/browse/SOLR-11974
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: Tests
>            Reporter: Steve Rowe
>            Priority: Major
>
> Reproducing branch_7x seed from my Jenkins - reproduces for me on master too:
> {noformat}
> Checking out Revision 6ae6ce2f42b61b117c31149ac87b1cb3d6ffe440 
> (refs/remotes/origin/branch_7x)
> [...]
>    [junit4]   2> NOTE: reproduce with: ant test  
> -Dtestcase=TestCollapseQParserPlugin -Dtests.method=testStringCollapse 
> -Dtests.seed=32531513E27A1FB -Dtests.slow=true -Dtests.locale=fr-LU 
> -Dtests.timezone=Europe/Warsaw -Dtests.asserts=true 
> -Dtests.file.encoding=UTF-8
>    [junit4] FAILURE 1.15s J5  | TestCollapseQParserPlugin.testStringCollapse 
> <<<
>    [junit4]    > Throwable #1: java.lang.AssertionError
>    [junit4]    >      at 
> __randomizedtesting.SeedInfo.seed([32531513E27A1FB:F6AD0130F74002EF]:0)
>    [junit4]    >      at 
> org.apache.lucene.index.AssertingLeafReader$AssertingSortedDocValues.advanceExact(AssertingLeafReader.java:617)
>    [junit4]    >      at 
> org.apache.solr.search.CollapsingQParserPlugin$OrdScoreCollector.collect(CollapsingQParserPlugin.java:557)
>    [junit4]    >      at 
> org.apache.lucene.search.MatchAllDocsQuery$1$1.score(MatchAllDocsQuery.java:62)
>    [junit4]    >      at 
> org.apache.lucene.search.BulkScorer.score(BulkScorer.java:39)
>    [junit4]    >      at 
> org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:660)
>    [junit4]    >      at 
> org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:462)
>    [junit4]    >      at 
> org.apache.solr.search.Grouping.searchWithTimeLimiter(Grouping.java:447)
>    [junit4]    >      at 
> org.apache.solr.search.Grouping.execute(Grouping.java:395)
>    [junit4]    >      at 
> org.apache.solr.handler.component.QueryComponent.doProcessGroupedSearch(QueryComponent.java:1409)
>    [junit4]    >      at 
> org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:367)
>    [junit4]    >      at 
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:295)
>    [junit4]    >      at 
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:195)
>    [junit4]    >      at 
> org.apache.solr.core.SolrCore.execute(SolrCore.java:2503)
>    [junit4]    >      at 
> org.apache.solr.util.TestHarness.query(TestHarness.java:337)
>    [junit4]    >      at 
> org.apache.solr.util.TestHarness.query(TestHarness.java:319)
>    [junit4]    >      at 
> org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:876)
>    [junit4]    >      at 
> org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:862)
>    [junit4]    >      at 
> org.apache.solr.search.TestCollapseQParserPlugin.testCollapseQueries(TestCollapseQParserPlugin.java:768)
>    [junit4]    >      at 
> org.apache.solr.search.TestCollapseQParserPlugin.testStringCollapse(TestCollapseQParserPlugin.java:213)
>    [junit4]    >      at java.lang.Thread.run(Thread.java:748)
> [...]
>    [junit4]   2> NOTE: test params are: codec=Asserting(Lucene70): 
> {text_ws=FSTOrd50, term_s=PostingsFormat(name=Memory), 
> id=PostingsFormat(name=MockRandom), group_s=PostingsFormat(name=MockRandom), 
> group_s_dv=FSTOrd50}, docValues:{id_i=DocValuesFormat(name=Direct), 
> group_i=DocValuesFormat(name=Direct), 
> group_ti_dv=DocValuesFormat(name=Lucene70), 
> _version_=DocValuesFormat(name=Asserting), 
> test_l=DocValuesFormat(name=Direct), 
> group_tf_dv=DocValuesFormat(name=Memory), 
> test_i=DocValuesFormat(name=Lucene70), 
> group_f=DocValuesFormat(name=Asserting), test_f=DocValuesFormat(name=Memory), 
> group_s_dv=DocValuesFormat(name=Asserting)}, maxPointsInLeafNode=1995, 
> maxMBSortInHeap=7.1608710565771645, sim=RandomSimilarity(queryNorm=false): 
> {}, locale=fr-LU, timezone=Europe/Warsaw
>    [junit4]   2> NOTE: Linux 4.1.0-custom2-amd64 amd64/Oracle Corporation 
> 1.8.0_151 (64-bit)/cpus=16,threads=1,free=168356360,total=529530880
> {noformat}
> I see this elsewhere in the log, multiple times:
> {noformat}
>    [junit4]   2> 484673 ERROR 
> (TEST-TestCollapseQParserPlugin.testNumericCollapse-seed#[32531513E27A1FB]) [ 
>    ] o.a.s.h.RequestHandlerBase java.lang.RuntimeException: 
> java.io.IOException: min/max must be Int or Float field types when collapsing 
> on numeric fields
>    [junit4]   2>      at 
> org.apache.solr.search.CollapsingQParserPlugin$CollapsingPostFilter.getFilterCollector(CollapsingQParserPlugin.java:377)
>    [junit4]   2>      at 
> org.apache.solr.search.SolrIndexSearcher.getProcessedFilter(SolrIndexSearcher.java:1085)
>    [junit4]   2>      at 
> org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1541)
>    [junit4]   2>      at 
> org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1417)
>    [junit4]   2>      at 
> org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:584)
>    [junit4]   2>      at 
> org.apache.solr.handler.component.QueryComponent.doProcessUngroupedSearch(QueryComponent.java:1435)
>    [junit4]   2>      at 
> org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:375)
>    [junit4]   2>      at 
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:295)
>    [junit4]   2>      at 
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:195)
>    [junit4]   2>      at 
> org.apache.solr.core.SolrCore.execute(SolrCore.java:2503)
>    [junit4]   2>      at 
> org.apache.solr.util.TestHarness.query(TestHarness.java:337)
>    [junit4]   2>      at 
> org.apache.solr.util.TestHarness.query(TestHarness.java:319)
>    [junit4]   2>      at 
> org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:876)
>    [junit4]   2>      at 
> org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:862)
>    [junit4]   2>      at 
> org.apache.solr.search.TestCollapseQParserPlugin.testCollapseQueries(TestCollapseQParserPlugin.java:617)
>    [junit4]   2>      at 
> org.apache.solr.search.TestCollapseQParserPlugin.testNumericCollapse(TestCollapseQParserPlugin.java:220)
>    [junit4]   2>      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
> Method)
>    [junit4]   2>      at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>    [junit4]   2>      at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>    [junit4]   2>      at java.lang.reflect.Method.invoke(Method.java:498)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1737)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:934)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:970)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:984)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
>    [junit4]   2>      at 
> org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:817)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:468)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:943)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:829)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:879)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:890)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
>    [junit4]   2>      at 
> org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
>    [junit4]   2>      at java.lang.Thread.run(Thread.java:748)
>    [junit4]   2> Caused by: java.io.IOException: min/max must be Int or Float 
> field types when collapsing on numeric fields
>    [junit4]   2>      at 
> org.apache.solr.search.CollapsingQParserPlugin$IntFieldValueCollector.<init>(CollapsingQParserPlugin.java:1159)
>    [junit4]   2>      at 
> org.apache.solr.search.CollapsingQParserPlugin$CollectorFactory.getCollector(CollapsingQParserPlugin.java:1401)
>    [junit4]   2>      at 
> org.apache.solr.search.CollapsingQParserPlugin$CollapsingPostFilter.getFilterCollector(CollapsingQParserPlugin.java:366)
>    [junit4]   2>      ... 54 more
>    [junit4]   2> 
>    [junit4]   2> 484681 INFO  
> (TEST-TestCollapseQParserPlugin.testNumericCollapse-seed#[32531513E27A1FB]) [ 
>    ] o.a.s.c.S.Request [collection1]  webapp=null path=null 
> params={q=*:*&fq={!collapse+field%3Dgroup_i+min%3Dtest_l}&sort=test_i+desc} 
> status=500 QTime=63
>    [junit4]   2> 484681 ERROR 
> (TEST-TestCollapseQParserPlugin.testNumericCollapse-seed#[32531513E27A1FB]) [ 
>    ] o.a.s.SolrTestCaseJ4 REQUEST FAILED: 
> q=*:*&fq={!collapse+field%3Dgroup_i+min%3Dtest_l}&sort=test_i+desc:java.lang.RuntimeException:
>  java.io.IOException: min/max must be Int or Float field types when 
> collapsing on numeric fields
>    [junit4]   2>      at 
> org.apache.solr.search.CollapsingQParserPlugin$CollapsingPostFilter.getFilterCollector(CollapsingQParserPlugin.java:377)
>    [junit4]   2>      at 
> org.apache.solr.search.SolrIndexSearcher.getProcessedFilter(SolrIndexSearcher.java:1085)
>    [junit4]   2>      at 
> org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1541)
>    [junit4]   2>      at 
> org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1417)
>    [junit4]   2>      at 
> org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:584)
>    [junit4]   2>      at 
> org.apache.solr.handler.component.QueryComponent.doProcessUngroupedSearch(QueryComponent.java:1435)
>    [junit4]   2>      at 
> org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:375)
>    [junit4]   2>      at 
> org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:295)
>    [junit4]   2>      at 
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:195)
>    [junit4]   2>      at 
> org.apache.solr.core.SolrCore.execute(SolrCore.java:2503)
>    [junit4]   2>      at 
> org.apache.solr.util.TestHarness.query(TestHarness.java:337)
>    [junit4]   2>      at 
> org.apache.solr.util.TestHarness.query(TestHarness.java:319)
>    [junit4]   2>      at 
> org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:876)
>    [junit4]   2>      at 
> org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:862)
>    [junit4]   2>      at 
> org.apache.solr.search.TestCollapseQParserPlugin.testCollapseQueries(TestCollapseQParserPlugin.java:617)
>    [junit4]   2>      at 
> org.apache.solr.search.TestCollapseQParserPlugin.testNumericCollapse(TestCollapseQParserPlugin.java:220)
>    [junit4]   2>      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
> Method)
>    [junit4]   2>      at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>    [junit4]   2>      at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>    [junit4]   2>      at java.lang.reflect.Method.invoke(Method.java:498)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1737)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:934)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:970)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:984)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
>    [junit4]   2>      at 
> org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:817)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:468)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:943)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:829)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:879)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:890)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
>    [junit4]   2>      at 
> org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
>    [junit4]   2>      at 
> org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
>    [junit4]   2>      at 
> com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
>    [junit4]   2>      at java.lang.Thread.run(Thread.java:748)
>    [junit4]   2> Caused by: java.io.IOException: min/max must be Int or Float 
> field types when collapsing on numeric fields
>    [junit4]   2>      at 
> org.apache.solr.search.CollapsingQParserPlugin$IntFieldValueCollector.<init>(CollapsingQParserPlugin.java:1159)
>    [junit4]   2>      at 
> org.apache.solr.search.CollapsingQParserPlugin$CollectorFactory.getCollector(CollapsingQParserPlugin.java:1401)
>    [junit4]   2>      at 
> org.apache.solr.search.CollapsingQParserPlugin$CollapsingPostFilter.getFilterCollector(CollapsingQParserPlugin.java:366)
>    [junit4]   2>      ... 54 more
> {noformat}



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