java.lang.UnsupportedClassVersionError

tip

This might be caused by and outdated version of Java, SonarQube now uses Java 8 as default. You might upgrade java or use an older version of SonarQube.

tip

If you're using intellij plugin of sonarqube, you might have to set the JAVA_HOME ambient variable manually.

tip

Update "latest" to Java 8 on DockerHub.

tip

You're using an older version of java with classes compiled for java7

You have a different solution? A short tip here would help you and many other users who saw this issue last week.

  • Hey community, after the last upgrade (I guess it was from Jenkins 1.551) to Jenkins 1.584 we encounter serious problems with our legacy Java5 Maven builds. When Jenkins calls the Maven plugin (right after "Parsing poms") the build crashes with the following stacktrace: {noformat} Parsing POMs Modules changed, recalculating dependency graph [my-maven-project] $ /var/apphome/162_cipbld/jdk_1.5_latest/bin/java -Xms64m -Xmx256m -XX:PermSize=64m -XX:MaxPermSize=256m -cp /var/apphome/162_cipbld/.jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-agent-1.5.jar:/var/apphome/162_cipbld/apache-maven-3.0.4/boot/plexus-classworlds-2.4.jar org.jvnet.hudson.maven3.agent.Maven3Main /var/apphome/162_cipbld/apache-maven-3.0.4 /var/apphome/162_cipbld/162_cipbld-0/webapps/jenkins/WEB-INF/lib/remoting-2.46.jar /var/apphome/162_cipbld/.jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-1.5.jar /var/apphome/162_cipbld/.jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-commons-1.5.jar 58566 Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:386) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) at org.jvnet.hudson.maven3.agent.Maven3Main.main(Maven3Main.java:135) at org.jvnet.hudson.maven3.agent.Maven3Main.main(Maven3Main.java:64) [EnvInject] - Injecting environment variables from a build step. [EnvInject] - Injecting as environment variables the properties file path '/path/to/my.properties' [EnvInject] - Variables injected successfully. ERROR: Failed to parse POMs java.net.SocketException: Connection reset at java.net.SocketInputStream.read(SocketInputStream.java:168) at java.io.FilterInputStream.read(FilterInputStream.java:116) at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) at java.io.BufferedInputStream.read(BufferedInputStream.java:237) at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:198) at hudson.remoting.Channel.<init>(Channel.java:418) at hudson.remoting.Channel.<init>(Channel.java:397) at hudson.remoting.Channel.<init>(Channel.java:393) at hudson.remoting.Channel.<init>(Channel.java:382) at hudson.remoting.Channel.<init>(Channel.java:374) at hudson.remoting.Channel.<init>(Channel.java:366) at hudson.slaves.Channels$1.<init>(Channels.java:70) at hudson.slaves.Channels.forProcess(Channels.java:70) at hudson.maven.AbstractMavenProcessFactory.newProcess(AbstractMavenProcessFactory.java:280) at hudson.maven.ProcessCache.get(ProcessCache.java:235) at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.doRun(MavenModuleSetBuild.java:759) at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:533) at hudson.model.Run.execute(Run.java:1754) at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:529) at hudson.model.ResourceController.execute(ResourceController.java:89) at hudson.model.Executor.run(Executor.java:240) Email was triggered for: Failure - Any {noformat} I figured out that the only difference between succeeding and failing builds was the version of remoting.jar. The new Jenkins version ships with version 2.46. When I stopped Tomcat and exchanged the remoting-2.46.jar with remoting-2.44.jar the builds work again. Could you please investigate this as it is crucial to us that the Java5 builds are still stable to build? Thanks!
    via by Stefan Strobel,
  • Hey community, after the last upgrade (I guess it was from Jenkins 1.551) to Jenkins 1.584 we encounter serious problems with our legacy Java5 Maven builds. When Jenkins calls the Maven plugin (right after "Parsing poms") the build crashes with the following stacktrace: {noformat} Parsing POMs Modules changed, recalculating dependency graph [my-maven-project] $ /var/apphome/162_cipbld/jdk_1.5_latest/bin/java -Xms64m -Xmx256m -XX:PermSize=64m -XX:MaxPermSize=256m -cp /var/apphome/162_cipbld/.jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-agent-1.5.jar:/var/apphome/162_cipbld/apache-maven-3.0.4/boot/plexus-classworlds-2.4.jar org.jvnet.hudson.maven3.agent.Maven3Main /var/apphome/162_cipbld/apache-maven-3.0.4 /var/apphome/162_cipbld/162_cipbld-0/webapps/jenkins/WEB-INF/lib/remoting-2.46.jar /var/apphome/162_cipbld/.jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-1.5.jar /var/apphome/162_cipbld/.jenkins/plugins/maven-plugin/WEB-INF/lib/maven3-interceptor-commons-1.5.jar 58566 Exception in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:386) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) at org.jvnet.hudson.maven3.agent.Maven3Main.main(Maven3Main.java:135) at org.jvnet.hudson.maven3.agent.Maven3Main.main(Maven3Main.java:64) [EnvInject] - Injecting environment variables from a build step. [EnvInject] - Injecting as environment variables the properties file path '/path/to/my.properties' [EnvInject] - Variables injected successfully. ERROR: Failed to parse POMs java.net.SocketException: Connection reset at java.net.SocketInputStream.read(SocketInputStream.java:168) at java.io.FilterInputStream.read(FilterInputStream.java:116) at java.io.BufferedInputStream.fill(BufferedInputStream.java:218) at java.io.BufferedInputStream.read(BufferedInputStream.java:237) at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:198) at hudson.remoting.Channel.<init>(Channel.java:418) at hudson.remoting.Channel.<init>(Channel.java:397) at hudson.remoting.Channel.<init>(Channel.java:393) at hudson.remoting.Channel.<init>(Channel.java:382) at hudson.remoting.Channel.<init>(Channel.java:374) at hudson.remoting.Channel.<init>(Channel.java:366) at hudson.slaves.Channels$1.<init>(Channels.java:70) at hudson.slaves.Channels.forProcess(Channels.java:70) at hudson.maven.AbstractMavenProcessFactory.newProcess(AbstractMavenProcessFactory.java:280) at hudson.maven.ProcessCache.get(ProcessCache.java:235) at hudson.maven.MavenModuleSetBuild$MavenModuleSetBuildExecution.doRun(MavenModuleSetBuild.java:759) at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:533) at hudson.model.Run.execute(Run.java:1754) at hudson.maven.MavenModuleSetBuild.run(MavenModuleSetBuild.java:529) at hudson.model.ResourceController.execute(ResourceController.java:89) at hudson.model.Executor.run(Executor.java:240) Email was triggered for: Failure - Any {noformat} I figured out that the only difference between succeeding and failing builds was the version of remoting.jar. The new Jenkins version ships with version 2.46. When I stopped Tomcat and exchanged the remoting-2.46.jar with remoting-2.44.jar the builds work again. Could you please investigate this as it is crucial to us that the Java5 builds are still stable to build? Thanks!
    via by Stefan Strobel,
  • Build failed in Jenkins: Creadur-Rat #148
    via by Apache Jenkins Server,
  • Build failed in Jenkins: Creadur-Rat-ParentPom #25
    via by Apache Jenkins Server,
  • Build failed in Jenkins: Creadur-Rat-ParentPom #26
    via by Apache Jenkins Server,
  • Build failed in Jenkins: Creadur-Rat-ParentPom #27
    via by Apache Jenkins Server,
  • Build failed in Jenkins: Creadur-Rat-Site #55
    via by Apache Jenkins Server,
  • Build failed in Jenkins: Creadur-Rat #149
    via by Apache Jenkins Server,
  • Build failed in Jenkins: Creadur-Rat-ParentPom #28
    via by Apache Jenkins Server,
  • Build failed in Jenkins: Creadur-Rat #150
    via by Apache Jenkins Server,
    • java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:386) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:244) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:230) at org.jvnet.hudson.maven3.agent.Maven3Main.main(Maven3Main.java:135) at org.jvnet.hudson.maven3.agent.Maven3Main.main(Maven3Main.java:64)

    Users with the same issue

    andyglickandyglick
    1 times, last one,
    rafaelrafael
    2 times, last one,
    Unknown visitor
    Unknown visitor1 times, last one,
    Unknown visitor
    Unknown visitor1 times, last one,
    Unknown visitor
    Unknown visitor1 times, last one,
    192 more bugmates