Test broken on jenkins but running locally - linux

Question

we are having such a weird error. Our Tests are running in the local machines (windows) but not running on jenkins (linux).
We get a
Caused by: java.lang.RuntimeException: There was an error in the forked process
java.lang.NoClassDefFoundError:
I'm being looking for solution and got this info on bugzilla
or archive.
Has anybody an idea about this issue and how to solve it?
Thanks
UPDATE
maven-surefire-plugin is also defined in the parent pom.xml for using with cobertura. The Tests are running twice but the second time the tests fails as described above.
I'm defining 2 profiles that are using the surefire-plugin and a surefire plugin definition in the section.
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<useSystemClassLoader>false</useSystemClassLoader>
<excludes>
<exclude>**/*IntegrationTest.java</exclude>
<exclude>**/*SoapUiTest.java</exclude>
</excludes>
<excludes>
<!--exclude>**/*.java</exclude -->
</excludes>
<additionalClasspathElements>
<additionalClasspathElement>${basedir}/src/main/java</additionalClasspathElement>
</additionalClasspathElements>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>soapUi</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<excludes>
<exclude>**/*EntityTest.java</exclude>
</excludes>
<includes>
<include>**/*SoapUiTest.java</include>
</includes>
</configuration>
</plugin>
</plugins>
</build>
</profile>
<profile>
<id>integration</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<excludes>
<exclude>**/*EntityTest.java</exclude>
</excludes>
<includes>
<include>**/*IntegrationTest.java</include>
</includes>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>
What I'm doing wrong?

Answer 1

I remember having similar issue. It might be related to ulimit - number of allowed opened files. ClassLoader needs to open file for loading. Since class is not loaded/available NoClassDefFoundError is thrown on method call.
Check how many files can be opened:
ulimit -a
To increase number of opened files:
ulimit -n NEW_NUMBER
In order to change it permanently follow instructions from this link
Follow the steps:
vi /etc/security/limits.conf and add below the mentioned
soft nofile 65535
hard nofile 65535

Answer 2

It was an ussue with cobertura itself (-Dcobertura.test=true). Activating it resolved the Problem.