Hi , Found another bug with CollapsignQParserPlugin. Not a critical one.
It throws an exception when used with <useFilterForSortedQuery> true </useFilterForSortedQuery> Patch attached (against 4.8.1 but reproducible in other branches also) 518 T11 C0 oasc.SolrCore.execute [collection1] webapp=null path=null params={q=*%3A*&fq=%7B%21collapse+field%3Dgroup_s%7D&defType=edismax&bf=field%28test_ti%29} hits=2 status=0 QTime=99 4557 T11 C0 oasc.SolrCore.execute [collection1] webapp=null path=null params={q=*%3A*&fq=%7B%21collapse+field%3Dgroup_s+nullPolicy%3Dexpand+min%3Dtest_tf%7D&defType=edismax&bf=field%28test_ti%29&sort=} hits=4 status=0 QTime=15 4587 T11 C0 oasc.SolrException.log ERROR java.lang.UnsupportedOperationException: Query does not implement createWeight at org.apache.lucene.search.Query.createWeight(Query.java:80) at org.apache.lucene.search.IndexSearcher.createNormalizedWeight(IndexSearcher.java:684) at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:297) at org.apache.solr.search.SolrIndexSearcher.getDocSetScore(SolrIndexSearcher.java:879) at org.apache.solr.search.SolrIndexSearcher.getDocSet(SolrIndexSearcher.java:902) at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1381) at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:478) at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:461) at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:218) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1952) at org.apache.solr.util.TestHarness.query(TestHarness.java:295) at org.apache.solr.util.TestHarness.query(TestHarness.java:278) at org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:676) at org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:669) at org.apache.solr.search.TestCollapseQParserPlugin.testCollapseQueries(TestCollapseQParserPlugin.java:106) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1618) at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:827) at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:863) at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:877) at com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:53) at org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:50) at org.apache.lucene.util.TestRuleFieldCacheSanity$1.evaluate(TestRuleFieldCacheSanity.java:51) at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:46) at com.carrotsearch.randomizedtesting.rules.SystemPropertiesInvariantRule$1.evaluate(SystemPropertiesInvariantRule.java:55) at org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:49) at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:65) at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:48) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:360) at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:793) at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:453) at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:836) at com.carrotsearch.randomizedtesting.RandomizedRunner$3.evaluate(RandomizedRunner.java:738) at com.carrotsearch.randomizedtesting.RandomizedRunner$4.evaluate(RandomizedRunner.java:772) at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:783) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:53) at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:46) at org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:42) at com.carrotsearch.randomizedtesting.rules.SystemPropertiesInvariantRule$1.evaluate(SystemPropertiesInvariantRule.java:55) at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:39) at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:39) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:43) at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:48) at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:65) at org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:55) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:360) at java.lang.Thread.run(Thread.java:745) 4588 T11 C0 oasc.SolrCore.execute [collection1] webapp=null path=null params={q=*%3A*&fq=%7B%21collapse+field%3Dgroup_s+nullPolicy%3Dcollapse+min%3Dfield%28test_ti%29%7D&sort=test_ti+desc} status=500 QTime=22 4591 T11 oasc.SolrException.log ERROR REQUEST FAILED: q=*%3A*&fq=%7B%21collapse+field%3Dgroup_s+nullPolicy%3Dcollapse+min%3Dfield%28test_ti%29%7D&sort=test_ti+desc:java.lang.UnsupportedOperationException: Query does not implement createWeight at org.apache.lucene.search.Query.createWeight(Query.java:80) at org.apache.lucene.search.IndexSearcher.createNormalizedWeight(IndexSearcher.java:684) at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:297) at org.apache.solr.search.SolrIndexSearcher.getDocSetScore(SolrIndexSearcher.java:879) at org.apache.solr.search.SolrIndexSearcher.getDocSet(SolrIndexSearcher.java:902) at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1381) at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:478) at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:461) at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:218) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1952) at org.apache.solr.util.TestHarness.query(TestHarness.java:295) at org.apache.solr.util.TestHarness.query(TestHarness.java:278) at org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:676) at org.apache.solr.SolrTestCaseJ4.assertQ(SolrTestCaseJ4.java:669) at org.apache.solr.search.TestCollapseQParserPlugin.testCollapseQueries(TestCollapseQParserPlugin.java:106) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1618) at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:827) at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:863) at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:877) at com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:53) at org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:50) at org.apache.lucene.util.TestRuleFieldCacheSanity$1.evaluate(TestRuleFieldCacheSanity.java:51) at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:46) at com.carrotsearch.randomizedtesting.rules.SystemPropertiesInvariantRule$1.evaluate(SystemPropertiesInvariantRule.java:55) at org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:49) at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:65) at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:48) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:360) at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:793) at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:453) at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:836) at com.carrotsearch.randomizedtesting.RandomizedRunner$3.evaluate(RandomizedRunner.java:738) at com.carrotsearch.randomizedtesting.RandomizedRunner$4.evaluate(RandomizedRunner.java:772) at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:783) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:53) at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:46) at org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:42) at com.carrotsearch.randomizedtesting.rules.SystemPropertiesInvariantRule$1.evaluate(SystemPropertiesInvariantRule.java:55) at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:39) at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:39) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:43) at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:48) at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:65) at org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:55) at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:360) at java.lang.Thread.run(Thread.java:745) --- Thanks & Regards Umesh Prasad