hudson.util.IOException2: Slave JVM has not reported exit code. Is it still running?
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java.lang.ClassFormatError: Failed to load hudson.slaves.SlaveComputer$SlaveVersion
at hudson.remoting.RemoteClassLoader.loadClassFile(RemoteClassLoader.java:325)
at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:237)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:249)
at hudson.remoting.MultiClassLoaderSerializer$Input.resolveClass(MultiClassLoaderSerializer.java:113)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1589)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1494)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1748)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1327)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:349)
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:325)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)