[ https://issues.apache.org/jira/browse/LUCENE-6435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14727119#comment-14727119 ]
Adrien Grand commented on LUCENE-6435: -------------------------------------- Do you have a test case that reproduces the issue that I could look into? > java.util.ConcurrentModificationException: Removal from the cache failed > error in SimpleNaiveBayesClassifier > ------------------------------------------------------------------------------------------------------------ > > Key: LUCENE-6435 > URL: https://issues.apache.org/jira/browse/LUCENE-6435 > Project: Lucene - Core > Issue Type: Bug > Components: modules/classification > Affects Versions: 5.1 > Reporter: Tommaso Teofili > Assignee: Tommaso Teofili > Fix For: Trunk > > > While using {{SimpleNaiveBayesClassifier}} on a very large index (all Italian > Wikipedia articles) I see the following code triggering a > {{ConcurrentModificationException}} when evicting the {{Query}} from the > {{LRUCache}}. > {code} > BooleanQuery booleanQuery = new BooleanQuery(); > BooleanQuery subQuery = new BooleanQuery(); > for (String textFieldName : textFieldNames) { > subQuery.add(new BooleanClause(new TermQuery(new Term(textFieldName, > word)), BooleanClause.Occur.SHOULD)); > } > booleanQuery.add(new BooleanClause(subQuery, BooleanClause.Occur.MUST)); > booleanQuery.add(new BooleanClause(new TermQuery(new Term(classFieldName, > c)), BooleanClause.Occur.MUST)); > //... > TotalHitCountCollector totalHitCountCollector = new > TotalHitCountCollector(); > indexSearcher.search(booleanQuery, totalHitCountCollector); > return totalHitCountCollector.getTotalHits(); > {code} > this is the complete stacktrace: > {code} > java.util.ConcurrentModificationException: Removal from the cache failed! > This is probably due to a query which has been modified after having been put > into the cache or a badly implemented clone(). Query class: [class > org.apache.lucene.search.BooleanQuery], query: [#text:panoram #cat:1356] > at > __randomizedtesting.SeedInfo.seed([B6513DEC3681FEF5:138235BE33532634]:0) > at > org.apache.lucene.search.LRUQueryCache.evictIfNecessary(LRUQueryCache.java:285) > at > org.apache.lucene.search.LRUQueryCache.putIfAbsent(LRUQueryCache.java:268) > at > org.apache.lucene.search.LRUQueryCache$CachingWrapperWeight.scorer(LRUQueryCache.java:569) > at > org.apache.lucene.search.ConstantScoreWeight.scorer(ConstantScoreWeight.java:82) > at org.apache.lucene.search.Weight.bulkScorer(Weight.java:137) > at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:560) > at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:367) > at > org.apache.lucene.classification.SimpleNaiveBayesClassifier.getWordFreqForClass(SimpleNaiveBayesClassifier.java:288) > at > org.apache.lucene.classification.SimpleNaiveBayesClassifier.calculateLogLikelihood(SimpleNaiveBayesClassifier.java:248) > at > org.apache.lucene.classification.SimpleNaiveBayesClassifier.assignClassNormalizedList(SimpleNaiveBayesClassifier.java:169) > at > org.apache.lucene.classification.SimpleNaiveBayesClassifier.assignClass(SimpleNaiveBayesClassifier.java:125) > at > org.apache.lucene.classification.WikipediaTest.testItalianWikipedia(WikipediaTest.java:126) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at > com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1627) > at > com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:836) > at > com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:872) > at > com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:886) > at > org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:50) > at > org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:46) > 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:365) > at > com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:798) > at > com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:458) > at > com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:845) > at > com.carrotsearch.randomizedtesting.RandomizedRunner$3.evaluate(RandomizedRunner.java:747) > at > com.carrotsearch.randomizedtesting.RandomizedRunner$4.evaluate(RandomizedRunner.java:781) > at > com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:792) > at > org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:46) > at > com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) > at > org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:42) > 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 > com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36) > at > org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:54) > 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:365) > at java.lang.Thread.run(Thread.java:745) > {code} > The strange thing is that the above doesn't happen if I change the last lines > of the above piece of code to not use the {{TotalHitCountsCollector}}: > {code} > return indexSearcher.search(booleanQuery, 1).totalHits; > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org