Intermittent NoClassDefFoundError when running a m

Question

We are building a large multi module Maven project on Jenkins, including running a large number of unit test.

Once every few builds the build fails on NoClassDefFoundError on RunListener - which is located in the unit jar. As you can see from the log below - JUnit is included in the classpath.

The error seems to appear completely at random.

Log

Waiting for Jenkins to finish collecting data
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test (default-test) on project taboola-svc: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test failed: A required class was missing while executing org.apache.maven.plugins:maven-surefire-plugin:2.17:test: org/junit/runner/notification/RunListener
[ERROR] -----------------------------------------------------
[ERROR] realm =    plugin>org.apache.maven.plugins:maven-surefire-plugin:2.17
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/home/builder/.m2/repository/org/apache/maven/plugins/maven-surefire-plugin/2.17/maven-surefire-plugin-2.17.jar
[ERROR] urls[1] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-junit47/2.17/surefire-junit47-2.17.jar
[ERROR] urls[2] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit48/2.17/common-junit48-2.17.jar
[ERROR] urls[3] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit4/2.17/common-junit4-2.17.jar
[ERROR] urls[4] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit3/2.17/common-junit3-2.17.jar
[ERROR] urls[5] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-grouper/2.17/surefire-grouper-2.17.jar
[ERROR] urls[6] = file:/home/builder/.m2/repository/org/apache/maven/shared/maven-shared-utils/0.4/maven-shared-utils-0.4.jar
[ERROR] urls[7] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-java5/2.17/common-java5-2.17.jar
[ERROR] urls[8] = file:/home/builder/.m2/repository/junit/junit/4.11/junit-4.11.jar
[ERROR] urls[9] = file:/home/builder/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar
[ERROR] urls[10] = file:/home/builder/.m2/repository/org/apache/maven/surefire/maven-surefire-common/2.17/maven-surefire-common-2.17.jar
[ERROR] urls[11] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-booter/2.17/surefire-booter-2.17.jar
[ERROR] urls[12] = file:/home/builder/.m2/repository/org/codehaus/plexus/plexus-utils/1.5.1/plexus-utils-1.5.1.jar
[ERROR] urls[13] = file:/home/builder/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.9/maven-reporting-api-2.0.9.jar
[ERROR] urls[14] = file:/home/builder/.m2/repository/org/apache/commons/commons-lang3/3.1/commons-lang3-3.1.jar
[ERROR] urls[15] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-api/2.17/surefire-api-2.17.jar
[ERROR] urls[16] = file:/home/builder/.m2/repository/org/apache/maven/plugin-tools/maven-plugin-annotations/3.2/maven-plugin-annotations-3.2.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import  from realm ClassRealm[maven.api, parent: null]]
[ERROR] 
[ERROR] -----------------------------------------------------: org.junit.runner.notification.RunListener
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test (default-test) on project taboola-svc: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test failed: A required class was missing while executing org.apache.maven.plugins:maven-surefire-plugin:2.17:test: org/junit/runner/notification/RunListener
-----------------------------------------------------
realm =    plugin>org.apache.maven.plugins:maven-surefire-plugin:2.17
strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
urls[0] = file:/home/builder/.m2/repository/org/apache/maven/plugins/maven-surefire-plugin/2.17/maven-surefire-plugin-2.17.jar
urls[1] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-junit47/2.17/surefire-junit47-2.17.jar
urls[2] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit48/2.17/common-junit48-2.17.jar
urls[3] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit4/2.17/common-junit4-2.17.jar
urls[4] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit3/2.17/common-junit3-2.17.jar
urls[5] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-grouper/2.17/surefire-grouper-2.17.jar
urls[6] = file:/home/builder/.m2/repository/org/apache/maven/shared/maven-shared-utils/0.4/maven-shared-utils-0.4.jar
urls[7] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-java5/2.17/common-java5-2.17.jar
urls[8] = file:/home/builder/.m2/repository/junit/junit/4.11/junit-4.11.jar
urls[9] = file:/home/builder/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar
urls[10] = file:/home/builder/.m2/repository/org/apache/maven/surefire/maven-surefire-common/2.17/maven-surefire-common-2.17.jar
urls[11] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-booter/2.17/surefire-booter-2.17.jar
urls[12] = file:/home/builder/.m2/repository/org/codehaus/plexus/plexus-utils/1.5.1/plexus-utils-1.5.1.jar
urls[13] = file:/home/builder/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.9/maven-reporting-api-2.0.9.jar
urls[14] = file:/home/builder/.m2/repository/org/apache/commons/commons-lang3/3.1/commons-lang3-3.1.jar
urls[15] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-api/2.17/surefire-api-2.17.jar
urls[16] = file:/home/builder/.m2/repository/org/apache/maven/plugin-tools/maven-plugin-annotations/3.2/maven-plugin-annotations-3.2.jar
Number of foreign imports: 1
import: Entry[import  from realm ClassRealm[maven.api, parent: null]]

-----------------------------------------------------

    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:167)
    at org.apache.maven.lifecycle.internal.LifecycleThreadedBuilder$1.call(LifecycleThreadedBuilder.java:163)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    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$Worker.runTask(ThreadPoolExecutor.java:895)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
    at java.lang.Thread.run(Thread.java:662)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default-test of goal org.apache.maven.plugins:maven-surefire-plugin:2.17:test failed: A required class was missing while executing org.apache.maven.plugins:maven-surefire-plugin:2.17:test: org/junit/runner/notification/RunListener
-----------------------------------------------------
realm =    plugin>org.apache.maven.plugins:maven-surefire-plugin:2.17
strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
urls[0] = file:/home/builder/.m2/repository/org/apache/maven/plugins/maven-surefire-plugin/2.17/maven-surefire-plugin-2.17.jar
urls[1] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-junit47/2.17/surefire-junit47-2.17.jar
urls[2] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit48/2.17/common-junit48-2.17.jar
urls[3] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit4/2.17/common-junit4-2.17.jar
urls[4] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit3/2.17/common-junit3-2.17.jar
urls[5] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-grouper/2.17/surefire-grouper-2.17.jar
urls[6] = file:/home/builder/.m2/repository/org/apache/maven/shared/maven-shared-utils/0.4/maven-shared-utils-0.4.jar
urls[7] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-java5/2.17/common-java5-2.17.jar
urls[8] = file:/home/builder/.m2/repository/junit/junit/4.11/junit-4.11.jar
urls[9] = file:/home/builder/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar
urls[10] = file:/home/builder/.m2/repository/org/apache/maven/surefire/maven-surefire-common/2.17/maven-surefire-common-2.17.jar
urls[11] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-booter/2.17/surefire-booter-2.17.jar
urls[12] = file:/home/builder/.m2/repository/org/codehaus/plexus/plexus-utils/1.5.1/plexus-utils-1.5.1.jar
urls[13] = file:/home/builder/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.9/maven-reporting-api-2.0.9.jar
urls[14] = file:/home/builder/.m2/repository/org/apache/commons/commons-lang3/3.1/commons-lang3-3.1.jar
urls[15] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-api/2.17/surefire-api-2.17.jar
urls[16] = file:/home/builder/.m2/repository/org/apache/maven/plugin-tools/maven-plugin-annotations/3.2/maven-plugin-annotations-3.2.jar
Number of foreign imports: 1
import: Entry[import  from realm ClassRealm[maven.api, parent: null]]

-----------------------------------------------------

    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:127)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    ... 13 more
Caused by: org.apache.maven.plugin.PluginContainerException: A required class was missing while executing org.apache.maven.plugins:maven-surefire-plugin:2.17:test: org/junit/runner/notification/RunListener
-----------------------------------------------------
realm =    plugin>org.apache.maven.plugins:maven-surefire-plugin:2.17
strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
urls[0] = file:/home/builder/.m2/repository/org/apache/maven/plugins/maven-surefire-plugin/2.17/maven-surefire-plugin-2.17.jar
urls[1] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-junit47/2.17/surefire-junit47-2.17.jar
urls[2] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit48/2.17/common-junit48-2.17.jar
urls[3] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit4/2.17/common-junit4-2.17.jar
urls[4] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-junit3/2.17/common-junit3-2.17.jar
urls[5] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-grouper/2.17/surefire-grouper-2.17.jar
urls[6] = file:/home/builder/.m2/repository/org/apache/maven/shared/maven-shared-utils/0.4/maven-shared-utils-0.4.jar
urls[7] = file:/home/builder/.m2/repository/org/apache/maven/surefire/common-java5/2.17/common-java5-2.17.jar
urls[8] = file:/home/builder/.m2/repository/junit/junit/4.11/junit-4.11.jar
urls[9] = file:/home/builder/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar
urls[10] = file:/home/builder/.m2/repository/org/apache/maven/surefire/maven-surefire-common/2.17/maven-surefire-common-2.17.jar
urls[11] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-booter/2.17/surefire-booter-2.17.jar
urls[12] = file:/home/builder/.m2/repository/org/codehaus/plexus/plexus-utils/1.5.1/plexus-utils-1.5.1.jar
urls[13] = file:/home/builder/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.9/maven-reporting-api-2.0.9.jar
urls[14] = file:/home/builder/.m2/repository/org/apache/commons/commons-lang3/3.1/commons-lang3-3.1.jar
urls[15] = file:/home/builder/.m2/repository/org/apache/maven/surefire/surefire-api/2.17/surefire-api-2.17.jar
urls[16] = file:/home/builder/.m2/repository/org/apache/maven/plugin-tools/maven-plugin-annotations/3.2/maven-plugin-annotations-3.2.jar
Number of foreign imports: 1
import: Entry[import  from realm ClassRealm[maven.api, parent: null]]

-----------------------------------------------------

    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:125)
    ... 14 more
Caused by: java.lang.NoClassDefFoundError: org/junit/runner/notification/RunListener
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.apache.maven.surefire.booter.IsolatedClassLoader.loadClass(IsolatedClassLoader.java:97)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.apache.maven.surefire.booter.IsolatedClassLoader.loadClass(IsolatedClassLoader.java:97)
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Class.java:2398)
    at java.lang.Class.getConstructor0(Class.java:2708)
    at java.lang.Class.getConstructor(Class.java:1659)
    at org.apache.maven.surefire.util.ReflectionUtils.getConstructor(ReflectionUtils.java:76)
    at org.apache.maven.surefire.util.ReflectionUtils.instantiateOneArg(ReflectionUtils.java:129)
    at org.apache.maven.surefire.booter.SurefireReflector.instantiateProvider(SurefireReflector.java:235)
    at org.apache.maven.surefire.booter.ProviderFactory.createProvider(ProviderFactory.java:113)
    at org.apache.maven.plugin.surefire.booterclient.ForkStarter.getSuitesIterator(ForkStarter.java:512)
    at org.apache.maven.plugin.surefire.booterclient.ForkStarter.runSuitesForkPerTestSet(ForkStarter.java:277)
    at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:169)
    at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeProvider(AbstractSurefireMojo.java:967)
    at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeAfterPreconditionsChecked(AbstractSurefireMojo.java:831)
    at org.apache.maven.plugin.surefire.AbstractSurefireMojo.execute(AbstractSurefireMojo.java:729)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    ... 14 more
Caused by: java.lang.ClassNotFoundException: org.junit.runner.notification.RunListener
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.apache.maven.surefire.booter.IsolatedClassLoader.loadClass(IsolatedClassLoader.java:97)
    ... 53 more
[ERROR] 
[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/PluginContainerException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :taboola-svc

---

More Info

• The build is running on a slave
• Jenkins ver. 1.565.2
• Tried with both maven 3.0.4, and 3.1.1
• Tried with surefire 2.16, 17 & 18
• Tried with junit 4.10 & 4.11

---

I have verified the SHA1 of JUnit jar in the Maven repository and made sure the jar file is not corrupted.

---

Command line

(defined in a jenkins job)

clean install -P FastTests -DIsBuildSystem=1 -T 4 -X -e

---

Relevant parts from the parent pom.xml

The project itself is a multi module pom project, with the parent pom defining the surefire definitions as attached.

....

        <!-- Generic tests plugin for maven -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>${testing.surefire.version}</version>
            <configuration>

                <systemPropertyVariables>
                    <startPortForDebug>${startPortForDebug}</startPortForDebug>
                    <surefireForkNumber>fork_${surefire.forkNumber}</surefireForkNumber>
                    <geoip.db.dir>${basedir}/../framework/target/</geoip.db.dir>
                    <java.awt.headless>true</java.awt.headless>
                    <redirectTestOutputToFile>true</redirectTestOutputToFile>
                </systemPropertyVariables>



                <!-- Use new JVM for each test -->
                <parallel>classes</parallel>

                <threadCount>1</threadCount>
                <forkCount>${testing.forkCount}</forkCount>
                <reuseForks>${testing.reuseFork}</reuseForks>
                <useSystemClassLoader>${testing.useSystemClassLoader}</useSystemClassLoader>
                <useManifestOnlyJar>${testing.useManifestOnlyJar}</useManifestOnlyJar>

                <!-- Display extra information on exception prints -->
                <useFile>true</useFile>
                <redirectTestOutputToFile>true</redirectTestOutputToFile>
                <runOrder>alphabetical</runOrder>

                <!-- Display extra information on exception prints -->
                <useFile>false</useFile>

                <!-- -->
                <forkedProcessTimeoutInSeconds>300</forkedProcessTimeoutInSeconds>


                <argLine>-XX:PermSize=128m -XX:MaxPermSize=512m -DIsBuildSystem=${is.build.system}</argLine>

            </configuration>
            <dependencies>
                <dependency>
                    <groupId>org.apache.maven.surefire</groupId>
                    <artifactId>surefire-junit47</artifactId>
                    <version>${testing.surefire.version}</version>
                </dependency>
                <dependency>
                    <groupId>junit</groupId>
                    <artifactId>junit</artifactId>
                    <version>${junit.version}</version>
                </dependency>
            </dependencies>

        </plugin>

....
        <profile>
            <id>FastTests</id>
            <properties>
                <testing.forkCount>0.5C</testing.forkCount>
                <testing.reuseFork>false</testing.reuseFork>
                <testing.useSystemClassLoader>true</testing.useSystemClassLoader>
                <testing.useManifestOnlyJar>false</testing.useManifestOnlyJar>
            </properties>
        </profile>

Answer 1

Just try to use the surfire-junit4 in place of surfire-junit47 :

                <dependency>
                    <groupId>org.apache.maven.surefire</groupId>
                    <artifactId>surefire-junit4</artifactId>
                    <version>${testing.surefire.version}</version>
                </dependency>

It will change classpath/runtime behavior, as it comes with less dependencies :

You may also try to completely remove this dependency as it's not required for parallel support :

http://maven.apache.org/surefire/maven-surefire-plugin/examples/junit.html

As of Surefire 2.7, no additional dependencies are needed to use the full set of options with parallel. As of Surefire 2.16, new thread-count attributes are introduced, namely threadCountSuites, threadCountClasses and threadCountMethods. Additionally, the new attributes parallelTestsTimeoutInSeconds and parallelTestsTimeoutForcedInSeconds are used to shut down the parallel execution after an elapsed timeout, and the attribute parallel specifies new values.

Does this solve the problem ?

Answer 2

It seems you have a random classloading issue.

The missing class appears since JUnit 4 : http://findjar.com/class/org/junit/runner/notification/RunListener.html

You should try to analyse surfire classpath by :

• execute : mvn -X clean test
• open file : target\surefire\surefire5942929663635698632tmp

You will see something like :

surefireClassPathUrl.0=D\:\\maven2\\repository\\org\\apache\\maven\\surefire\\surefire-junit47\\2.17\\surefire-junit47-2.17.jar
surefireClassPathUrl.1=D\:\\maven2\\repository\\org\\apache\\maven\\surefire\\common-junit48\\2.17\\common-junit48-2.17.jar
surefireClassPathUrl.2=D\:\\maven2\\repository\\org\\apache\\maven\\surefire\\common-junit4\\2.17\\common-junit4-2.17.jar
surefireClassPathUrl.3=D\:\\maven2\\repository\\org\\apache\\maven\\surefire\\common-junit3\\2.17\\common-junit3-2.17.jar
surefireClassPathUrl.4=D\:\\maven2\\repository\\org\\apache\\maven\\surefire\\surefire-api\\2.17\\surefire-api-2.17.jar
surefireClassPathUrl.5=D\:\\maven2\\repository\\org\\apache\\maven\\surefire\\common-java5\\2.17\\common-java5-2.17.jar
surefireClassPathUrl.6=D\:\\maven2\\repository\\org\\apache\\maven\\shared\\maven-shared-utils\\0.4\\maven-shared-utils-0.4.jar
surefireClassPathUrl.7=D\:\\maven2\\repository\\com\\google\\code\\findbugs\\jsr305\\2.0.1\\jsr305-2.0.1.jar
surefireClassPathUrl.8=D\:\\maven2\\repository\\org\\apache\\maven\\surefire\\surefire-grouper\\2.17\\surefire-grouper-2.17.jar

Try to ensure JUnit 3.x -and related jars- are not loaded.

For example, you may try to exclude common-junit3 from surfire-junit47 :

                <dependency>
                    <groupId>org.apache.maven.surefire</groupId>
                    <artifactId>surefire-junit47</artifactId>
                    <version>2.17</version>
                    <exclusions>
                        <exclusion>
                            <groupId>org.apache.maven.surfire</groupId>
                            <artifactId>common-junit3</artifactId>
                        </exclusion>
                    </exclusions>
                </dependency>

Answer 3

Try running the maven build without the -T 4.

The parallel builds feature in Maven 3 is still in the experimental stages, and it appears that there are known issues with thread safety in the plexus-utils library prior to version 2.0.5 - you're using version 1.5.1.

Edit:

Your problem is this dependency:

        <dependency>
            <groupId>org.apache.maven.surefire</groupId>
            <artifactId>surefire-junit47</artifactId>
            <version>${testing.surefire.version}</version>
        </dependency>

surefire-junit47 depends on maven-surefire-common, which in turn depends on maven-artifact, which depends on plexus-utils-1.5.1. As stated above, this has known thread safety issues, which is likely what is causing your problems. I'm not sure what parts of the surefire-junit47 library you're using, but if switching to surefire-junit4 is an option, then that should solve your problem.

After looking at the docs for the surefire plugin a little more, it looks like you need the surefire-junit47 provider to run parallel tests. I'd try overriding plexus-utils to be version 2.0.5 and see if that works; otherwise, you can override the maven-artifact version to 3.0.3 or higher and see if that works.

Answer 4

If all your builds use the same workspace, and if its possible for several builds to run concurrently or overlap in any way, it's possible that the "clean" action is wiping out required build artifacts while another build is trying to use them.

If that's what's happening, the fix would be to have each build run use its own workspace.