Maven throws "Cannot find symbol" in Jenkins

Question

I'm creating a local instance for Jenkins and Sonarqube. After creating project and after configuring the same, I clicked "Build Now". In the console output I can see that Maven starts to download the required meta data and once that is completed it throws Compilation error "Cannot find symbol" for each of the file in the project.

Maven is also installed installed in my machine and, I tried downloading the project from GIT and ran maven via command prompt it builds successfully. Only if I build via Jenkins I'm getting this issue. Can someone please help me out with this.

Sonar Error

[ERROR] Failed to execute goal org.codehaus.mojo:sonar-maven-plugin:2.6:sonar (default-cli) on project XXXXXXX: Execution default-cli of goal org.codehaus.mojo:sonar-maven-plugin:2.6:sonar failed: An API incompatibility was encountered while executing org.codehaus.mojo:sonar-maven-plugin:2.6:sonar: java.lang.UnsupportedClassVersionError: org/sonar/api/utils/SonarException : Unsupported major.minor version 51.0

[ERROR] -----------------------------------------------------
[ERROR] realm = plugin>org.codehaus.mojo:sonar-maven-plugin:2.6
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories /1/org/codehaus/mojo/sonar-maven-plugin/2.6/sonar-maven-plugin-2.6.jar
[ERROR] urls[1] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/org/apache/maven/shared/maven-dependency-tree/2.1/maven-dependency-tree-2.1.jar
[ERROR] urls[2] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/backport-util-concurrent/backport-util-concurrent/3.1/backport-util-concurrent-3.1.jar
[ERROR] urls[3] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/org/codehaus/plexus/plexus-interpolation/1.11/plexus-interpolation-1.11.jar
[ERROR] urls[4] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/org/codehaus/plexus/plexus-component-annotations/1.5.5/plexus-component-annotations-1.5.5.jar
[ERROR] urls[5] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/org/eclipse/aether/aether-util/0.9.0.M2/aether-util-0.9.0.M2.jar
[ERROR] urls[6] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/org/sonatype/plexus/plexus-sec-dispatcher/1.4/plexus-sec-dispatcher-1.4.jar
[ERROR] urls[7] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/org/codehaus/plexus/plexus-utils/1.5.5/plexus-utils-1.5.5.jar
[ERROR] urls[8] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/org/sonatype/plexus/plexus-cipher/1.4/plexus-cipher-1.4.jar
[ERROR] urls[9] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/org/codehaus/sonar/runner/sonar-runner-api/2.4/sonar-runner-api-2.4.jar
[ERROR] urls[10] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/commons-lang/commons-lang/2.6/commons-lang-2.6.jar
[ERROR] urls[11] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/com/google/guava/guava/10.0.1/guava-10.0.1.jar
[ERROR] urls[12] = file:/C:/Program%20Files%20(x86)/Jenkins/maven-repositories/1/com/google/code/findbugs/jsr305/2.0.3/jsr305-2.0.3.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import from realm ClassRealm[project>com.XXXX.etl:XXXX:0.0.1-SNAPSHOT, parent: ClassRealm[maven.api, parent: null]]]

[ERROR]
[ERROR] -----------------------------------------------------
[ERROR] -> [Help 1]

Solution

Please specify the compilation version of Java. This is the reason why You are facing this issue - UnsupportedClassVersionError try adding something like this in Your pom.xml

<build>
    <plugins>
        <!-- START Of Plugins -->
        <!-- MAVEN COMPILER PLUGIN -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.3</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>
        <!-- END Of Plugins -->
    </plugins>
</build>

Here I have used 1.7 jdk. But You can change that if required.

Please let know if it works...

Comments

[VSMK]

That's it I was using JDK 1.6 upgrading to 1.7 did the trick. Other than that I found another solution too. If Jenkins, maven and Sonar are installed in the same system you can mention "sonar:sonar" under build it works in with jdk1.6 itself. Report can be viewed in sonar.