I resolved this issue in our environment by fixing the PATH on the build machine... I updated the PATH environment variable so that it was using JDK 1.6 rather than JDK 1.5.
Bob From: jenkinsci-users@googlegroups.com [mailto:jenkinsci-users@googlegroups.com] On Behalf Of Sameh Tawfik Sent: Tuesday, June 18, 2013 11:19 AM To: jenkinsci-users@googlegroups.com Subject: Re: Failed to load hudson.scm.AbstractCvs$1 Does anyone have an idea about this bad Jenkins behavior? This problem is preventing us from using Jenkins? On Monday, June 17, 2013 3:55:05 PM UTC-7, Sameh Tawfik wrote: Hi, I'm using Jenkins ver. 1.518<http://jenkins-ci.org/> , and I setup a slave "testbuild" that is In sync with the master, and when I attempt to run a build, the following is generated? Does anyone knows what is the fix to this problem? Started by user anonymous Building remotely on testbuild in workspace /tmp/jenkins hudson.util.IOException2: remote file operation failed: /tmp at hudson.remoting.Channel@1bd7921c:testbuild<mailto:hudson.remoting.Channel@1bd7921c:testbuild> at hudson.FilePath.act(FilePath.java:901) at hudson.FilePath.act(FilePath.java:878) at hudson.scm.AbstractCvs.perform(AbstractCvs.java:226) at hudson.scm.AbstractCvs.checkout(AbstractCvs.java:192) at hudson.scm.CVSSCM.checkout(CVSSCM.java:323) at hudson.model.AbstractProject.checkout(AbstractProject.java:1369) at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:676) at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:88) at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:581) at hudson.model.Run.execute(Run.java:1576) at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46) at hudson.model.ResourceController.execute(ResourceController.java:88) at hudson.model.Executor.run(Executor.java:241) Caused by: java.io.IOException: Remote call on testbuild failed at hudson.remoting.Channel.call(Channel.java:681) at hudson.FilePath.act(FilePath.java:894) ... 12 more Caused by: java.lang.ClassFormatError: Failed to load hudson.scm.AbstractCvs$1 at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:193) at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:144) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:242) at hudson.remoting.MultiClassLoaderSerializer$Input.resolveClass(MultiClassLoaderSerializer.java:113) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1543) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1465) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1698) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1304) at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1917) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1841) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1718) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1304) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:349) at hudson.remoting.UserRequest.deserialize(UserRequest.java:182) at hudson.remoting.UserRequest.perform(UserRequest.java:98) at hudson.remoting.UserRequest.perform(UserRequest.java:48) at hudson.remoting.Request$2.run(Request.java:326) at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269) at java.util.concurrent.FutureTask.run(FutureTask.java:123) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675) at java.lang.Thread.run(Thread.java:595) Caused by: 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.lang.ClassLoader.defineClass(ClassLoader.java:465) at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:191) ... 26 more Finished: FAILURE -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. 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