I just upgraded Jenkins from 2.39 to 2.57. After the upgrade, Jenkins can no longer communicate with my SSH build nodes. I get the following error:
<===[JENKINS REMOTING CAPACITY]===>channel started
Slave JVM has not reported exit code. Is it still running?
[04/28/17 01:29:32] Launch failed - cleaning up connection
[04/28/17 01:29:32] [SSH] Connection closed.
ERROR: Connection terminated
java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2335)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2804)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:802)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:299)
at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:48)
at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34)
at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:59)
Caused: java.io.IOException: Unexpected termination of the channel
at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:73)
Based on Googling 'Slave JVM has not reported exit code.' it seems like a Java version mismatch (JENKINS-30561, JENKINS-29120), but I can confirm that my build nodes are using Java 1.7:
$ java -version
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)
Does anyone have ideas what could be causing this? More info can be provided on request.
