[dna-issues] [JBoss JIRA] Resolved: (DNA-572) FederatedRepositoryConnection Can Freeze When Exception Thrown from RepositoryConnection.execute(...)

FederatedRepositoryConnection Can Freeze When Exception Thrown from RepositoryConnection.execute(...) ----------------------------------------------------------------------------------------------------- Key: DNA-572 URL: https://jira.jboss.org/jira/browse/DNA-572 Project: DNA Issue Type: Bug Components: Connectors, Federation Affects Versions: 0.6 Reporter: Brian Carothers Assignee: Brian Carothers Priority: Minor Fix For: 0.7 Attachments: DNA-572.patch If a runtime exception is thrown from with a RepositoryConnection.execute method, the FederatedRepositoryConnector can get stuck waiting infinitely for a countdown latch on the FederatedRequest. The stack trace for the blocked main thread follows: Thread [main] (Suspended) Unsafe.park(boolean, long) line: not available [native method] LockSupport.park(Object) line: 158 CountDownLatch$Sync(AbstractQueuedSynchronizer).parkAndCheckInterrupt() line: 747 CountDownLatch$Sync(AbstractQueuedSynchronizer).doAcquireSharedInterruptibly(int) line: 905 CountDownLatch$Sync(AbstractQueuedSynchronizer).acquireSharedInterruptibly(int) line: 1217 CountDownLatch.await() line: 207 FederatedRequest.await() line: 97 JoinRequestProcessor.process(BlockingQueue<FederatedRequest>) line: 141 FederatedRepositoryConnection.execute(ExecutionContext, Request) line: 221 Graph.execute(Request) line: 267 Graph$Batch.execute() line: 4592 GraphSession<Payload,PropertyPayload>.save() line: 813 SessionCache.save() line: 374 JcrSession.save() line: 876 SetPropertyStringTest.testSetNullStringArray() line: 362 NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method] NativeMethodAccessorImpl.invoke(Object, Object[]) line: 39 DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25 Method.invoke(Object, Object...) line: 597 SetPropertyStringTest(TestCase).runTest() line: 168 SetPropertyStringTest(TestCase).runBare() line: 134 TestResult$1.protect() line: 110 JCRTestResult(TestResult).runProtected(Test, Protectable) line: 128 JCRTestResult(TestResult).run(TestCase) line: 113 SetPropertyStringTest(TestCase).run(TestResult) line: 124 SetPropertyStringTest(AbstractJCRTest).run(TestResult) line: 406 TestSuite.runTest(Test, TestResult) line: 232 TestSuite.run(TestResult) line: 227 TestSuite.runTest(Test, TestResult) line: 232 TestSuite.run(TestResult) line: 227 AllTests(JUnit38ClassRunner).run(RunNotifier) line: 81 JUnit4TestClassReference(JUnit4TestReference).run(TestExecution) line: 46 TestExecution.run(ITestReference[]) line: 38 RemoteTestRunner.runTests(String[], String, TestExecution) line: 467 RemoteTestRunner.runTests(TestExecution) line: 683 RemoteTestRunner.run() line: 390 RemoteTestRunner.main(String[]) line: 197 This condition can be reproduced by forcing a NullPointerException in the execute method of a connection (e.g., the SimpleJpaConnection).