Disconnecting/launching a slave agent often causes this error:
```
ERROR: Connection terminated
java.io.IOException: Unexpected termination of the channel
at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:50)
Caused by: java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2325)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2794)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:801)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:299)
at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:40)
at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:34)
at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48)
ERROR: Failed to update jenkins-slave.exe
hudson.remoting.RequestAbortedException: java.io.IOException: Unexpected termination of the channel
at hudson.remoting.Request.abort(Request.java:295)
at hudson.remoting.Channel.terminate(Channel.java:814)
at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:69)
at ......remote call to lanthanum(Native Method)
at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1356)
at hudson.remoting.Request.call(Request.java:171)
at hudson.remoting.Channel.call(Channel.java:751)
at hudson.FilePath.act(FilePath.java:969)
at hudson.FilePath.act(FilePath.java:958)
at hudson.FilePath.exists(FilePath.java:1426)
at org.jenkinsci.modules.windows_slave_installer.SlaveExeUpdater$1.call(SlaveExeUpdater.java:46)
at org.jenkinsci.modules.windows_slave_installer.SlaveExeUpdater$1.call(SlaveExeUpdater.java:37)
at jenkins.util.ContextRe
```