[
https://issues.apache.org/jira/browse/JENA-400?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andy Seaborne resolved JENA-400.
--------------------------------
Resolution: Fixed
Fix Version/s: Jena 2.10.1
> Hang when running tests that depend on Jena in parallel using Maven
> -------------------------------------------------------------------
>
> Key: JENA-400
> URL: https://issues.apache.org/jira/browse/JENA-400
> Project: Apache Jena
> Issue Type: Bug
> Components: Jena
> Affects Versions: Jena 2.10.0
> Reporter: Stephen Owens
> Assignee: Andy Seaborne
> Priority: Minor
> Fix For: Jena 2.10.1
>
>
> Running multiple test classes that use Jena can cause a hang during JUnit
> test execution. We reduced this to two separate test classes, each with only
> one test, roughly as follows:
> import java.io.IOException;
> import org.junit.Test;
> import com.hp.hpl.jena.rdf.model.ModelFactory;
> public class FirstJenaTest
> {
> @Test
> public void test() throws IOException
> {
> ModelFactory.createDefaultModel();
> }
> }
> TEST 2:
> import org.junit.Test;
> import com.hp.hpl.jena.query.Query;
> public class SecondJenaTest
> {
> @Test
> public void test()
> {
> new Query();
> }
> }
> pom.xml:
> ...
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-surefire-plugin</artifactId>
> <configuration>
> <parallel>classes</parallel>
> <includes>
> <include>**/FirstJenaTest.java</include>
> <include>**/SecondJenaTest.java</include>
> </includes>
> </configuration>
> . . .
> </plugin>
> ...
> Here's part of the thread dump we captured:
> "pool-1-thread-2" prio=5 tid=7fb9be6f5800 nid=0x1159a7000 in Object.wait()
> [1159a4000]
> java.lang.Thread.State: RUNNABLE
> at org.apache.jena.riot.RIOT.<clinit>(RIOT.java:38)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:169)
> at com.hp.hpl.jena.rdf.model.impl.IO_Ctl.callByRefection(IO_Ctl.java:54)
> at com.hp.hpl.jena.rdf.model.impl.IO_Ctl.init(IO_Ctl.java:36)
> - locked <7f3883170> (a java.lang.Object)
> at com.hp.hpl.jena.rdf.model.impl.ModelCom.<clinit>(ModelCom.java:65)
> at
> com.hp.hpl.jena.rdf.model.ModelFactory.createDefaultModel(ModelFactory.java:140)
> at xx.FirstJenaTest.test(FirstJenaTest.java:xx)
> 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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
> at
> org.apache.maven.surefire.junitcore.ClassDemarcatingRunner.run(ClassDemarcatingRunner.java:58)
> at org.junit.runners.Suite.runChild(Suite.java:128)
> at org.junit.runners.Suite.runChild(Suite.java:24)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:680)
> "pool-1-thread-1" prio=5 tid=7fb9be0d8000 nid=0x1158a4000 in Object.wait()
> [1158a1000]
> java.lang.Thread.State: RUNNABLE
> at
> com.hp.hpl.jena.rdf.model.ModelFactory.createDefaultModel(ModelFactory.java:140)
> at com.hp.hpl.jena.vocabulary.OWL.<clinit>(OWL.java:36)
> at com.hp.hpl.jena.sparql.ARQConstants.<clinit>(ARQConstants.java:44)
> at com.hp.hpl.jena.query.ARQ.<clinit>(ARQ.java:70)
> at com.hp.hpl.jena.query.Query.<clinit>(Query.java:63)
> at xx.SecondJenaTest.test(SecondJenaTest.java:xx)
> 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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
> at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
> at
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
> at
> org.apache.maven.surefire.junitcore.ClassDemarcatingRunner.run(ClassDemarcatingRunner.java:58)
> at org.junit.runners.Suite.runChild(Suite.java:128)
> at org.junit.runners.Suite.runChild(Suite.java:24)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:680)
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