Launch slave agent via Java Web Start is the connection option.

At some point of time, Jenkins fails to reach the slave. The error I see is:

[java] Please wait while the installer processes files, 30 out of 39 modules done
[java]
FATAL: hudson.remoting.RequestAbortedException: java.net.SocketException: Socket closed
hudson.remoting.RequestAbortedException: hudson.remoting.RequestAbortedException: java.net.SocketException: Socket closed
at hudson.remoting.Request.call(Request.java:174)
at hudson.remoting.Channel.call(Channel.java:672)
at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:158)
at $Proxy46.join(Unknown Source)
at hudson.Launcher$RemoteLauncher$ProcImpl.join(Launcher.java:915)
at hudson.Launcher$ProcStarter.join(Launcher.java:360)
at hudson.tasks.Ant.perform(Ant.java:217)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:810)
at hudson.model.Build$BuildExecution.build(Build.java:199)
at hudson.model.Build$BuildExecution.doRun(Build.java:160)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:592)
at hudson.model.Run.execute(Run.java:1543)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:236)
Caused by: hudson.remoting.RequestAbortedException: java.net.SocketException: Socket closed
at hudson.remoting.Request.abort(Request.java:299)
at hudson.remoting.Channel.terminate(Channel.java:732)
at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:69)
Caused by: java.net.SocketException: Socket closed
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
at java.io.ObjectInputStream$PeekInputStream.peek(ObjectInputStream.java:2248)
at java.io.ObjectInputStream$BlockDataInputStream.peek(ObjectInputStream.java:2541)
at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2551)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1296)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
at hudson.remoting.Command.readFrom(Command.java:92)
at hudson.remoting.ClassicCommandTransport.read(ClassicCommandTransport.java:59)
at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48)

The last log entry under /var/lib/jenkins/logs/slaves/vmbam08.eur.ad.sag shows this:

JNLP agent connected from /10.74.21.234
<===[HUDSON REMOTING CAPACITY]===>rO0ABXNyABpodWRzb24ucmVtb3RpbmcuQ2FwYWJpbGl0eQAAAAAAAAABAgABSgAEbWFza3hwAAAAAAAAAAY=