Deadlock between ResourceChangeNotifierImpl.subscribeResourceChangeListener and ResourceChangeScannerImpl.subscribeNotifier --------------------------------------------------------------------------------------------------------------------------- Key: JBRULES-2463 URL: https://jira.jboss.org/jira/browse/JBRULES-2463 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 5.0.1.FINAL Reporter: Andreas Kohn Assignee: Mark Proctor This deadlock was found by our continouos integration system which is building drools using mvn. Found one Java-level deadlock: ============================= "Thread-42": waiting to lock monitor 0x00002aaaf8f2e8d0 (object 0x00002aaab4645830, a java.util.HashMap), which is held by "main" "main": waiting to lock monitor 0x00002aaaf4f3a028 (object 0x00002aaab46459b0, a java.util.HashMap), which is held by "Thread-42" Java stack information for the threads listed above: =================================================== "Thread-42": at org.drools.io.impl.ResourceChangeNotifierImpl.subscribeResourceChangeListener(ResourceChangeNotifierImpl.java:64) - waiting to lock <0x00002aaab4645830> (a java.util.HashMap) at org.drools.io.impl.ResourceChangeNotifierImpl.subscribeChildResource(ResourceChangeNotifierImpl.java:103) at org.drools.io.impl.ResourceChangeScannerImpl.scan(ResourceChangeScannerImpl.java:128) - locked <0x00002aaab46459b0> (a java.util.HashMap) at org.drools.io.impl.ResourceChangeScannerImpl$ProcessChangeSet.run(ResourceChangeScannerImpl.java:276) - locked <0x00002aaab46459b0> (a java.util.HashMap) - locked <0x00002aaade2c97d8> (a org.drools.io.impl.ResourceChangeScannerImpl$ProcessChangeSet) at java.lang.Thread.run(Thread.java:619) "main": at org.drools.io.impl.ResourceChangeScannerImpl.subscribeNotifier(ResourceChangeScannerImpl.java:64) - waiting to lock <0x00002aaab46459b0> (a java.util.HashMap) at org.drools.io.impl.ResourceChangeNotifierImpl.subscribeResourceChangeListener(ResourceChangeNotifierImpl.java:70) - locked <0x00002aaab4645830> (a java.util.HashMap) at org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgentImpl.java:150) - locked <0x00002aaade2c9c18> (a java.util.HashMap) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:117) - locked <0x00002aaade2c9c18> (a java.util.HashMap) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:109) at org.drools.agent.KnowledgeAgentTest.testModifyDirectory(KnowledgeAgentTest.java:776) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at junit.framework.TestCase.runTest(TestCase.java:154) at junit.framework.TestCase.runBare(TestCase.java:127) at junit.framework.TestResult$1.protect(TestResult.java:106) at junit.framework.TestResult.runProtected(TestResult.java:124) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:118) at junit.framework.TestSuite.runTest(TestSuite.java:208) at junit.framework.TestSuite.run(TestSuite.java:203) at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.maven.surefire.junit.JUnitTestSet.execute(JUnitTestSet.java:213) at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:140) at org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:127) at org.apache.maven.surefire.Surefire.run(Surefire.java:177) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:345) at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1009) Found 1 deadlock. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira