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From "Tommaso Teofili (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (LUCENE-6435) java.util.ConcurrentModificationException: Removal from the cache failed error in SimpleNaiveBayesClassifier
Date Thu, 01 Oct 2015 07:25:04 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-6435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tommaso Teofili resolved LUCENE-6435.
-------------------------------------
       Resolution: Fixed
    Fix Version/s: 6.0

> 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, 6.0
>
>         Attachments: LUCENE-6435.patch, patch.rtf
>
>
> 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}



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