https://bz.apache.org/bugzilla/show_bug.cgi?id=58370
Bug ID: 58370
Summary: Data race on field
org.apache.tomcat.util.net.AbstractEndpoint.executor
Product: Tomcat 8
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Util
Assignee: dev@tomcat.apache.org
Reporter: yilong...@runtimeverification.com
Reported by RV-Predict (a dynamic race detector) when running the test suite:
Data race on field org.apache.tomcat.util.net.AbstractEndpoint.executor: {{{
Concurrent read in thread T26 (locks held: {Monitor@3fa4c950})
----> at
org.apache.tomcat.util.net.AbstractEndpoint.getCurrentThreadsBusy(AbstractEndpoint.java:548)
at
org.apache.coyote.http11.Http11Processor.disableKeepAlive(Http11Processor.java:111)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:994)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:279)
- locked Monitor@3fa4c950 at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:259)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
T26 is created by T24
at
java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:1010)
Concurrent write in thread T1 (locks held: {Monitor@24ff6454})
----> at
org.apache.tomcat.util.net.AbstractEndpoint.shutdownExecutor(AbstractEndpoint.java:598)
at
org.apache.tomcat.util.net.JIoEndpoint.stopInternal(JIoEndpoint.java:417)
at
org.apache.tomcat.util.net.AbstractEndpoint.stop(AbstractEndpoint.java:809)
at org.apache.coyote.AbstractProtocol.stop(AbstractProtocol.java:516)
at
org.apache.catalina.connector.Connector.stopInternal(Connector.java:1011)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
- locked Monitor@24ff6454 at
org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:n/a)
at
org.apache.catalina.connector.TestConnector.testStop(TestConnector.java:61)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:38)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:535)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1182)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:1033)
T1 is the main thread
}}}
Data race on field org.apache.tomcat.util.net.AbstractEndpoint.executor: {{{
Concurrent read in thread T26 (locks held: {Monitor@3fa4c950})
----> at
org.apache.tomcat.util.net.AbstractEndpoint.getMaxThreadsExecutor(AbstractEndpoint.java:409)
at
org.apache.tomcat.util.net.AbstractEndpoint.getMaxThreads(AbstractEndpoint.java:404)
at
org.apache.coyote.http11.Http11Processor.disableKeepAlive(Http11Processor.java:110)
at
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:994)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:279)
- locked Monitor@3fa4c950 at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:259)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
T26 is created by T24
at
java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:1010)
Concurrent write in thread T1 (locks held: {Monitor@24ff6454})
----> at
org.apache.tomcat.util.net.AbstractEndpoint.shutdownExecutor(AbstractEndpoint.java:598)
at
org.apache.tomcat.util.net.JIoEndpoint.stopInternal(JIoEndpoint.java:417)
at
org.apache.tomcat.util.net.AbstractEndpoint.stop(AbstractEndpoint.java:809)
at org.apache.coyote.AbstractProtocol.stop(AbstractProtocol.java:516)
at
org.apache.catalina.connector.Connector.stopInternal(Connector.java:1011)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
- locked Monitor@24ff6454 at
org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:n/a)
at
org.apache.catalina.connector.TestConnector.testStop(TestConnector.java:61)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:38)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:535)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1182)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:1033)
T1 is the main thread
}}}
Data race on field org.apache.tomcat.util.net.AbstractEndpoint.executor: {{{
Concurrent read in thread T24 (locks held: {Monitor@3fa4c950})
----> at
org.apache.tomcat.util.net.AbstractEndpoint.getExecutor(AbstractEndpoint.java:288)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:306)
- locked Monitor@3fa4c950 at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:259)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
T24 is created by T22
at
java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:1010)
Concurrent write in thread T1 (locks held: {Monitor@24ff6454})
----> at
org.apache.tomcat.util.net.AbstractEndpoint.shutdownExecutor(AbstractEndpoint.java:598)
at
org.apache.tomcat.util.net.JIoEndpoint.stopInternal(JIoEndpoint.java:417)
at
org.apache.tomcat.util.net.AbstractEndpoint.stop(AbstractEndpoint.java:809)
at org.apache.coyote.AbstractProtocol.stop(AbstractProtocol.java:516)
at
org.apache.catalina.connector.Connector.stopInternal(Connector.java:1011)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
- locked Monitor@24ff6454 at
org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:n/a)
at
org.apache.catalina.connector.TestConnector.testStop(TestConnector.java:61)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:38)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:535)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1182)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:1033)
T1 is the main thread
}}}
Looks like the data race only happens upon shutdownExecutor.
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