JENKINS: ERROR when I try to use an older JDK for a specific maven project

问题

I am using the Jenkins version 2.73-1.1 on a CentOS Linux release 7.3.1611 server.

There are 3 different versions of JDK on the server:

[root @ jenkins java] # ll
total 12
lrwxrwxrwx. 1 root root 16 27 Apr 16.25 default -> / usr / java / latest
drwxr-xr-x. 8 root root 4096 27 Mar 2013 jdk1.6.0_45
drwxr-xr-x. Root root 4096 11 Apr 2015 jdk1.7.0_80
drwxr-xr-x. 9 root root 4096 27 Apr 16.25 jdk1.8.0_131
lrwxrwxrwx. 1 root root 22 27 apr 16.25 latest -> /usr/java/jdk1.8.0_131

As shown in the pictures below, Jenkins is using the jdk1.8.0_131 version and in my project I specified to use JDK7.

Jenkins setup Image 1

Jenkins setup Image 2

When I try to compile my project (mvn clean deploy), the build fails and I see this ERROR in log:

[Vodafone] $ /usr/java/jdk1.7.0_80/bin/java -cp /var/lib/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-agent-1.11.jar:/opt/apache-maven-3.0.4/boot/plexus-classworlds-2.4.jar org.jvnet.hudson.maven3.agent.Maven3Main /opt/apache-maven-3.0.4 /var/cache/jenkins/war/WEB-INF/lib/remoting-3.10.jar /var/lib/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-1.11.jar /var/lib/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-commons-1.11.jar 46349 <===[JENKINS REMOTING CAPACITY]===>channel started ERROR: ================================================================================ ERROR: Invalid project setup: jenkins/security/MasterToSlaveCallable : Unsupported major.minor version 52.0 ERROR: [JENKINS-18403][JENKINS-28294] JDK 'JAVA7' not supported to run Maven projects. ERROR: Maven projects have to be launched with a Java version greater or equal to the minimum version required by the master. ERROR: Use the Maven JDK Toolchains (plugin) to build your maven project with an older JDK. ERROR: Retrying with slave Java and setting compile/test properties to point to /usr/java/jdk1.7.0_80. ERROR: ================================================================================ Established TCP socket on 38129 [Vodafone] $ /usr/java/jdk1.8.0_131/jre/bin/java -cp /var/lib/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-agent-1.11.jar:/opt/apache-maven-3.0.4/boot/plexus-classworlds-2.4.jar org.jvnet.hudson.maven3.agent.Maven3Main /opt/apache-maven-3.0.4 /var/cache/jenkins/war/WEB-INF/lib/remoting-3.10.jar /var/lib/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-1.11.jar /var/lib/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-commons-1.11.jar 38129 <===[JENKINS REMOTING CAPACITY]===>channel started

Why Jenkins doesn't use jdk 7?

回答1:

As it is documented on the maven project plugin of jenkins home page:

Jenkins >= 2.54 requires Java 8 thus Maven jobs must be launched with Java >= 8

Luckily the best workaround is just mentioned in your stacktrace:

... Use the Maven JDK Toolchains (plugin) to build your maven project with an older JDK...

In order to compile your project using java 7 and launching successful jenkins job using current jenkins version, I would recommend you to use this plugin by 2 simple steps:

Add toolchains.xml file to your .m2 directory both on developers system and jenkins server

<toolchains>
  <toolchain>
    <type>jdk</type>
    <provides>
      <version>1.7</version>
      <vendor>openjdk</vendor>
    </provides>
    <configuration>
      <jdkHome>/usr/lib/jvm/java-7-openjdk-amd64</jdkHome>
    </configuration>
  </toolchain>
  <toolchain>
    <type>jdk</type>
    <provides>
      <version>1.8</version>
      <vendor>openjdk</vendor>
    </provides>
    <configuration>
      <jdkHome>/usr/lib/jvm/java-8-openjdk-amd64</jdkHome>
    </configuration>
  </toolchain> 
  [...]
</toolchains>

Add toolchain plugin to your project pom file

<project>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-toolchains-plugin</artifactId>
        <version>1.1</version>
        <executions>
          <execution>
            <goals>
              <goal>toolchain</goal>
            </goals>
            </execution>
          </executions>
          <configuration>
            <toolchains>
              <jdk>
                <version>1.7</version>  
                <vendor>openjdk</vendor>
              </jdk>
            </toolchains>
          </configuration>
      </plugin>
    </plugins>
  </build>
</project>

Finally config your jenkins job to use jdk 8, toolchain will take care of compiling your project with jdk 7.

回答2:

Try configuring a Freestyle Job in Jenkins. You will need to select the "Invoke top-level Maven targets" build. I was having a similar problem. This worked for me.

来源：https://stackoverflow.com/questions/46276236/jenkins-error-when-i-try-to-use-an-older-jdk-for-a-specific-maven-project

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