JUnit + Maven + Parallel Test Execution Error

Question

I have a problem executing JUnit Tests in parallel when Using JUnit, Groovy, Spock and Maven. When executing them, I get the following after test are passed succesfully:

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 18.362s
[INFO] Finished at: Wed Mar 20 15:14:25 CET 2013
[INFO] Final Memory: 16M/221M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.14:test (default-test) on project spock-webdriver: ExecutionException; nested exception is java.util.concurrent.ExecutionException: java.lang.RuntimeException: There was an error in the forked process
[ERROR] java.lang.NoSuchMethodError: org.apache.maven.surefire.common.junit4.JUnit4RunListener.rethrowAnyTestMechanismFailures(Lorg/junit/runner/Result;)V
[ERROR] at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:129)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
[ERROR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[ERROR] at java.lang.reflect.Method.invoke(Method.java:601)
[ERROR] at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray2(ReflectionUtils.java:208)
[ERROR] at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:158)
[ERROR] at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:86)
[ERROR] at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
[ERROR] at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:95)
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

When enabling to force using Junit 47 Provider in my pom.xml, I get that:

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.271s
[INFO] Finished at: Wed Mar 20 15:31:42 CET 2013
[INFO] Final Memory: 17M/178M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.14:test (default-test) on project spock-webdriver: ExecutionException; nested exception is java.util.concurrent.ExecutionException: java.lang.RuntimeException: There was an error in the forked process
[ERROR] java.lang.NoSuchMethodError: org.apache.maven.surefire.util.TestsToRun.size()I
[ERROR] at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:123)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[ERROR] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
[ERROR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[ERROR] at java.lang.reflect.Method.invoke(Method.java:601)
[ERROR] at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray2(ReflectionUtils.java:208)
[ERROR] at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:158)
[ERROR] at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:86)
[ERROR] at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
[ERROR] at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:95)
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

The pom.xml looks like this

<dependencies>
        <dependency>
            <groupId>org.seleniumhq.selenium</groupId>
            <artifactId>selenium-java</artifactId>
            <version>2.31.0</version>
            <scope>compile</scope>
        </dependency>

        <!--If this is commented out parallel testing is not working!!! When in testexecution itself is not working  -->
        <dependency>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>2.14</version>
        </dependency>

        <dependency>
            <groupId>org.spockframework</groupId>
            <artifactId>spock-maven</artifactId>
            <version>0.7-groovy-2.0</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.codehaus.gmaven</groupId>
                <artifactId>gmaven-plugin</artifactId>
                <version>1.3</version>
                <configuration>
                    <providerSelection>1.7</providerSelection>
                    <source/>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.codehaus.gmaven.runtime</groupId>
                        <artifactId>gmaven-runtime-1.7</artifactId>
                        <version>1.3</version>
                        <exclusions>
                            <exclusion>
                                <groupId>org.codehaus.groovy</groupId>
                                <artifactId>groovy-all</artifactId>
                            </exclusion>
                        </exclusions>
                    </dependency>
                    <dependency>
                        <groupId>org.codehaus.groovy</groupId>
                        <artifactId>groovy-all</artifactId>
                        <version>2.0.6</version>
                    </dependency>
                </dependencies>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.14</version>
                <dependencies>
                </dependencies>
                <configuration>
                    <includes>
                        <include>**/*Test.java</include>
                    </includes>
                    <!-- Surefire 2.14+ configuration for parallelization -->
                    <forkCount>5</forkCount>
                    <reuseForks>false</reuseForks>
                </configuration>
            </plugin>
        </plugins>
    </build>

Answer 1

This is an old thread but for others who might run into this problem ... This error is caused because of an inconsistency with the surefire plugin dependencies and spock 0.7.0 dependencies. Spock uses surefire-junit47, version 2.11. This class/method, JUnit4RunListener.rethrowAnyTestMechanismFailures does not exist in that surefire version. The solution is to exclude the surefire version from the spock dependency definition like this:

<dependency>
    <groupId>org.spockframework</groupId>
    <artifactId>spock-maven</artifactId>
    <version>0.7-groovy-2.0</version>
    <exclusions>
        <exclusion>  <!-- exclude so we can pick up surefire-junit4 2.17 version for failsafe integration tests  -->
            <groupId>org.apache.maven.surefire</groupId>
            <artifactId>surefire-junit47</artifactId>
        </exclusion>
    </exclusions>
</dependency>

Now, it will use the surefire version you've defined, for completeness, here's the surefire dependency I use:

<dependency>
    <groupId>org.apache.maven.surefire</groupId>
    <artifactId>surefire-junit4</artifactId>
    <version>2.17</version>
</dependency>

And then the surefire plugin definition which allows unit and integration tests to fire separately (this part is more about getting unit tests, integration tests, spock, maven and groovy to play nice).

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>2.17</version>
    <dependencies>
        <dependency>
            <groupId>org.apache.maven.surefire</groupId>
            <artifactId>surefire-junit4</artifactId>
            <version>2.17</version>
        </dependency>
    </dependencies>
    <configuration>
        <forkCount>0</forkCount>
        <includes>
            <include>%regex[.*Test.*]</include>
        </includes>
        <excludes>
            <exclude>%regex[.*IntegrationTest.*]</exclude>
        </excludes>
    </configuration>
</plugin>

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-failsafe-plugin</artifactId>
    <version>2.17</version>
    <configuration>
        <includes>
            <include>%regex[.*IntegrationTest.*]</include>
        </includes>
    </configuration>
    <executions>
        <execution>
            <id>failsafe-integration-tests</id>
            <goals>
                <goal>integration-test</goal>
            </goals>
        </execution>
    </executions>
</plugin>

Now, unit tests will fire with the test goal and integration tests can be launched independently on demand like this: mvn failsafe:integration-test