When I try to start a slave agent on my Ubuntu 12.04 machine (the master is running 14.04), I get the following error:
[10/06/15 16:26:42] [SSH] Starting slave process: cd "/home/build/jenkins-workspace" && java -jar slave.jar <===[JENKINS REMOTING CAPACITY]===>channel started hudson.util.IOException2: Slave JVM has not reported exit code. Is it still running? at hudson.plugins.sshslaves.SSHLauncher.startSlave(SSHLauncher.java:984) at hudson.plugins.sshslaves.SSHLauncher.access$400(SSHLauncher.java:137) at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:725) at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:706) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: java.io.IOException: Remote call on Ubuntu1204-amd64-1 failed at hudson.remoting.Channel.call(Channel.java:786) at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:493) at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:366) at hudson.plugins.sshslaves.SSHLauncher.startSlave(SSHLauncher.java:976) ... 7 more Caused by: java.lang.ClassFormatError: Failed to load hudson.slaves.SlaveComputer$SlaveVersion at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:340) at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:251) at java.lang.ClassLoader.loadClass(ClassLoader.java:323) at java.lang.ClassLoader.loadClass(ClassLoader.java:268) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:274) at hudson.remoting.MultiClassLoaderSerializer$Input.resolveClass(MultiClassLoaderSerializer.java:113) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1611) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1516) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1349) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369) at hudson.remoting.UserRequest.deserialize(UserRequest.java:185) at hudson.remoting.UserRequest.perform(UserRequest.java:99) at hudson.remoting.UserRequest.perform(UserRequest.java:49) at hudson.remoting.Request$2.run(Request.java:326) at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:701) at ......remote call to Ubuntu1204-amd64-1(Native Method) at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1413) at hudson.remoting.UserResponse.retrieve(UserRequest.java:221) at hudson.remoting.Channel.call(Channel.java:778) ... 10 more Caused by: java.lang.UnsupportedClassVersionError: hudson/slaves/SlaveComputer$SlaveVersion : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:643) at java.lang.ClassLoader.defineClass(ClassLoader.java:489) at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:338) at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:251) at java.lang.ClassLoader.loadClass(ClassLoader.java:323) at java.lang.ClassLoader.loadClass(ClassLoader.java:268) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:274) at hudson.remoting.MultiClassLoaderSerializer$Input.resolveClass(MultiClassLoaderSerializer.java:113) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1611) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1516) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1349) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369) at hudson.remoting.UserRequest.deserialize(UserRequest.java:185) at hudson.remoting.UserRequest.perform(UserRequest.java:99) at hudson.remoting.UserRequest.perform(UserRequest.java:49) at hudson.remoting.Request$2.run(Request.java:326) at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:701) [10/06/15 16:26:47] Launch failed - cleaning up connection ERROR: Connection terminated java.io.IOException: Unexpected termination of the channel at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:50) [10/06/15 16:26:47] [SSH] Connection closed. Caused by: java.io.EOFException at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2332) at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2801) at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:801) at java.io.ObjectInputStream.<init>(ObjectInputStream.java:299) at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:40) at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34) at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48) .. Any idea what might cause this problem? -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. 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