yes ,it is java version is too old on the failed slave , you can see which java used befor " Starting slave process: cd "/home/build/jenkins-workspace" && java -jar slave.jar",so you can modify the JavaPath in the slave config page.
在 2015年10月7日星期三 UTC+8上午4:34:26，Mark Waite写道： > > The remote machine is probably configured to run a java version which is > too old. For example, you may have Java 6 installed on the Ubuntu 12.04 > machine when you need to install Java 7. > > If Java 7 is installed on the Ubuntu 12 machine, then you may need to > configure the Jenkins slave to run with that java instead of the default > Java on the Ubuntu 12 machine. > > Mark Waite > > On Tue, Oct 6, 2015 at 2:31 PM Zach La Celle <zlac...@gmail.com > <javascript:>> wrote: > >> 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 jenkinsci-use...@googlegroups.com <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/jenkinsci-users/e5fb00c7-6aed-4236-88c9-e547543e2794%40googlegroups.com >> >> <https://groups.google.com/d/msgid/jenkinsci-users/e5fb00c7-6aed-4236-88c9-e547543e2794%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. 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