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  1. Jenkins
  2. JENKINS-40810

UnsupportedClassVersionError when using JDK6

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      Hi Guys,

      we recently upgraded our jenkins from 2.19.4 LTS to 2.32.1 LTS and we are facing an issue in jobs using JDK 6.

      If I run in master the exception below occours but the job succeds:

      Established TCP socket on 43500
      [spj-deploy-fabrica] $ /opt/jenkins-java/jdk1.6/bin/java -Duser.timezone=GMT-03:00 -Djavax.net.ssl.trustStore=/opt/security/cacert.jks -Djavax.net.ssl.trustStorePassword=jb05%c@c3rtP@5%w0rd -cp /var/procergs/build-tools/jenkins/plugins/maven-plugin/WEB-INF/lib/maven32-agent-1.8.1.jar:/opt/apache-maven-3/boot/plexus-classworlds-2.5.1.jar:/opt/apache-maven-3/conf/logging jenkins.maven3.agent.Maven32Main /opt/apache-maven-3 /opt/jboss-eap-7.0/domain/servers/JENKINS/tmp/vfs/temp/temp2beba3780575b554/content-1dac40c08d58316e/WEB-INF/lib/remoting-3.2.jar /var/procergs/build-tools/jenkins/plugins/maven-plugin/WEB-INF/lib/maven32-interceptor-1.8.1.jar /var/procergs/build-tools/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-commons-1.8.1.jar 43500
      Exception in thread "main" java.lang.UnsupportedClassVersionError: hudson/remoting/Launcher : Unsupported major.minor version 51.0
      	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 org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:389)
      	at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
      	at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259)
      	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:242)
      	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227)
      	at jenkins.maven3.agent.Maven32Main.main(Maven32Main.java:143)
      	at jenkins.maven3.agent.Maven32Main.main(Maven32Main.java:74)
      ERROR: ================================================================================
      ERROR: Invalid project setup: Connection reset
      ERROR: [JENKINS-18403][JENKINS-28294] JDK 'jdk1.6.0_27' 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 /opt/jenkins-java/jdk1.6.
      ERROR: ================================================================================
      Established TCP socket on 48365
      [spj-deploy-fabrica] $ /opt/java/jdk1.8.0_91/jre/bin/java -Duser.timezone=GMT-03:00 -Djavax.net.ssl.trustStore=/opt/security/cacert.jks -Djavax.net.ssl.trustStorePassword=jb05%c@c3rtP@5%w0rd -cp /var/procergs/build-tools/jenkins/plugins/maven-plugin/WEB-INF/lib/maven32-agent-1.8.1.jar:/opt/apache-maven-3/boot/plexus-classworlds-2.5.1.jar:/opt/apache-maven-3/conf/logging jenkins.maven3.agent.Maven32Main /opt/apache-maven-3 /opt/jboss-eap-7.0/domain/servers/JENKINS/tmp/vfs/temp/temp2beba3780575b554/content-1dac40c08d58316e/WEB-INF/lib/remoting-3.2.jar /var/procergs/build-tools/jenkins/plugins/maven-plugin/WEB-INF/lib/maven32-interceptor-1.8.1.jar /var/procergs/build-tools/jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-commons-1.8.1.jar 48365
      <===[JENKINS REMOTING CAPACITY]===>channel started
      

      But when it runs on a slave it fails:

      Established TCP socket on 41401
      maven32-agent.jar already up to date
      maven32-interceptor.jar already up to date
      maven3-interceptor-commons.jar already up to date
      [spj-deploy-fabrica] $ /opt/jenkins-java/jdk1.6/bin/java -Duser.timezone=GMT-03:00 -Djavax.net.ssl.trustStore=/opt/security/cacert.jks -Djavax.net.ssl.trustStorePassword=jb05%c@c3rtP@5%w0rd -cp /home/procergs/jboss/jenkins-slave/maven32-agent.jar:/opt/apache-maven-3/boot/plexus-classworlds-2.5.1.jar:/opt/apache-maven-3/conf/logging jenkins.maven3.agent.Maven32Main /opt/apache-maven-3 /home/procergs/jboss/jenkins-slave/slave.jar /home/procergs/jboss/jenkins-slave/maven32-interceptor.jar /home/procergs/jboss/jenkins-slave/maven3-interceptor-commons.jar 41401
      Exception in thread "main" java.lang.UnsupportedClassVersionError: hudson/remoting/Launcher : Unsupported major.minor version 51.0
      	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 org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:389)
      	at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42)
      	at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259)
      	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:242)
      	at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227)
      	at jenkins.maven3.agent.Maven32Main.main(Maven32Main.java:143)
      	at jenkins.maven3.agent.Maven32Main.main(Maven32Main.java:74)
      [spj-deploy-fabrica] $ /bin/sh -xe /tmp/hudson4749605600898410228.sh
      + cp spj-ear/target/spj.ear /weblogic/beades/user_projects/domains//dom_xpj_004_w10/autodeploy
      cp: cannot stat 'spj-ear/target/spj.ear': No such file or directory
      Build step 'Executar shell' marked build as failure
      ERROR: Falhou ao analisar POMs
      java.io.EOFException: unexpected stream termination
      	at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:365)
      	at hudson.remoting.ChannelBuilder.build(ChannelBuilder.java:310)
      	at hudson.slaves.Channels.forProcess(Channels.java:115)
      	at hudson.maven.AbstractMavenProcessFactory.newProcess(AbstractMavenProcessFactory.java:294)
      	at hudson.maven.ProcessCache.get(ProcessCache.java:236)
      	at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.doRun(MavenModuleSetBuild.java:798)
      	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:534)
      	at hudson.model.Run.execute(Run.java:1728)
      	at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:544)
      	at hudson.model.ResourceController.execute(ResourceController.java:98)
      	at hudson.model.Executor.run(Executor.java:404)
      Started calculate disk usage of build
      Finished Calculation of disk usage of build in 0 seconds
      Started calculate disk usage of workspace
      Finished Calculation of disk usage of workspace in  2 second
      Finished: FAILURE
      

      I don't know if it is related but there was a recent change in remoting in 2.27 (see JENKINS-37565)

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            Hide
            rmpestano Rafael Pestano added a comment -

            Ok, thank you guys for the info.

            Show
            rmpestano Rafael Pestano added a comment - Ok, thank you guys for the info.
            Hide
            danielbeck Daniel Beck added a comment -

            I'm adding some documentation for it in https://github.com/jenkins-infra/jenkins.io/pull/554

            Show
            danielbeck Daniel Beck added a comment - I'm adding some documentation for it in https://github.com/jenkins-infra/jenkins.io/pull/554
            Hide
            scm_issue_link SCM/JIRA link daemon added a comment -

            Code changed in jenkins
            User: Daniel Beck
            Path:
            content/changelog-stable/index.html
            content/doc/upgrade-guide/2.32.adoc
            http://jenkins-ci.org/commit/jenkins.io/1692ba554089a4281a8407372a51af5c3ef19db6
            Log:
            JENKINS-40810 Mention effect of Remoting 3 on Maven builds

            Show
            scm_issue_link SCM/JIRA link daemon added a comment - Code changed in jenkins User: Daniel Beck Path: content/changelog-stable/index.html content/doc/upgrade-guide/2.32.adoc http://jenkins-ci.org/commit/jenkins.io/1692ba554089a4281a8407372a51af5c3ef19db6 Log: JENKINS-40810 Mention effect of Remoting 3 on Maven builds
            Hide
            scm_issue_link SCM/JIRA link daemon added a comment -

            Code changed in jenkins
            User: Daniel Beck
            Path:
            content/changelog-stable/index.html
            http://jenkins-ci.org/commit/jenkins.io/39718b18cb7c201a6ce6d37b541e7736c3b8fc2b
            Log:
            JENKINS-40810 Make Java requirement explicit

            Show
            scm_issue_link SCM/JIRA link daemon added a comment - Code changed in jenkins User: Daniel Beck Path: content/changelog-stable/index.html http://jenkins-ci.org/commit/jenkins.io/39718b18cb7c201a6ce6d37b541e7736c3b8fc2b Log: JENKINS-40810 Make Java requirement explicit
            Hide
            scm_issue_link SCM/JIRA link daemon added a comment -

            Code changed in jenkins
            User: R. Tyler Croy
            Path:
            content/changelog-stable/index.html
            content/doc/upgrade-guide/2.32.adoc
            http://jenkins-ci.org/commit/jenkins.io/7dc33503c5af2c7be284927e78ca2d3c9870761b
            Log:
            Merge pull request #554 from daniel-beck/JENKINS-40810

            JENKINS-40810 Mention effect of Remoting 3 on Maven builds

            Compare: https://github.com/jenkins-infra/jenkins.io/compare/294071086e58...7dc33503c5af

            Show
            scm_issue_link SCM/JIRA link daemon added a comment - Code changed in jenkins User: R. Tyler Croy Path: content/changelog-stable/index.html content/doc/upgrade-guide/2.32.adoc http://jenkins-ci.org/commit/jenkins.io/7dc33503c5af2c7be284927e78ca2d3c9870761b Log: Merge pull request #554 from daniel-beck/ JENKINS-40810 JENKINS-40810 Mention effect of Remoting 3 on Maven builds Compare: https://github.com/jenkins-infra/jenkins.io/compare/294071086e58...7dc33503c5af

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              • Assignee:
                Unassigned
                Reporter:
                rmpestano Rafael Pestano
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                Watchers:
                4 Start watching this issue

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                • Created:
                  Updated:
                  Resolved: