Hi,

I am also facing similar issue. Where you able to resolve this issue. Could 
you please let me know how this was fixed?


On Tuesday, March 22, 2016 at 10:26:58 AM UTC-4, [email protected] wrote:
>
> HI,
>
> Issue:  Jenkin Slave running in a Docker Container unable to connect to 
> the Jenkins Master.
>
> I have Jenkins Master in Docker Container on AWS EC2 Instance.  I have 
> installed AWS ECS (Container Plugin).   Jenkins Slaves are running in the 
> Docker container.   
>
> Here is the log:
>
> Jenkins Master Log:
>
>
> Mar 21, 2016 11:18:41 PM WARNING jenkins.slaves.JnlpSlaveHandshake error
>
> TCP slave agent connection handler #10 with /10.231.5.122:56870 is 
> aborted: JNLP2-connect: rejected connection for node: my-slave-13
>
> Mar 21, 2016 11:18:41 PM INFO 
> hudson.TcpSlaveAgentListener$ConnectionHandler run
>
> Accepted connection #11 from /10.231.5.122:56871
>
> Mar 21, 2016 11:18:41 PM WARNING jenkins.slaves.JnlpSlaveHandshake error
>
> TCP slave agent connection handler #11 with /10.231.5.122:56871 is 
> aborted: Unauthorized access
>
> Mar 21, 2016 11:18:41 PM INFO 
> hudson.TcpSlaveAgentListener$ConnectionHandler run
>
> Accepted connection #12 from /10.231.5.122:56872
>
> Mar 21, 2016 11:18:41 PM WARNING 
> hudson.TcpSlaveAgentListener$ConnectionHandler run
>
> Connection #12 failed
>
> java.io.EOFException
>
>                 at 
> java.io.DataInputStream.readUnsignedShort(DataInputStream.java:340)
>
>                 at 
> java.io.DataInputStream.readUTF(DataInputStream.java:589)
>
>                 at 
> java.io.DataInputStream.readUTF(DataInputStream.java:564)
>
>                 at 
> hudson.TcpSlaveAgentListener$ConnectionHandler.run(TcpSlaveAgentListener.java:150)
>
>  
>
> Jenkins Slave Log:
>
>
> On the slave, I am getting the following error
>
> ar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main createEngine
>
> INFO: Setting up slave: my-slave-13
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener <init>
>
> INFO: Jenkins agent is running in headless mode.
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener status
>
> INFO: Locating server among [http://10.231.1.123:8080/jenkins/]
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener status
>
> INFO: Handshaking
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener status
>
> INFO: Connecting to 10.231.1.123:50000
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener status
>
> INFO: Trying protocol: JNLP2-connect
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener status
>
> INFO: Server didn't understand the protocol: JNLP2-connect: rejected 
> connection for node: my-slave-13
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener status
>
> INFO: Connecting to 10.231.1.123:50000
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener status
>
> INFO: Trying protocol: JNLP-connect
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener status
>
> INFO: Server didn't understand the protocol: Unauthorized access
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener status
>
> INFO: Connecting to 10.231.1.123:50000
>
> Mar 21, 2016 11:18:41 PM hudson.remoting.jnlp.Main$CuiListener error
>
> SEVERE: The server rejected the connection: None of the protocols were 
> accepted
>
> java.lang.Exception: The server rejected the connection: None of the 
> protocols were accepted
>
>         at hudson.remoting.Engine.onConnectionRejected(Engine.java:297)
>
>         at hudson.remoting.Engine.run(Engine.java:268)
>

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