Hello, Previously I had a Jenkins master running on an EC2 instance in the Amazon cloud, and two slave nodes, one of which was also in EC2 and the other of which is here at my institution, behind a firewall. Both slaves connected to the master using Java Web Start and everything worked fine.
Now I am not able to set up new slaves inside my institution--they time out while handshaking with the master. And while my existing node inside the institute continued to work, after I disconnected it and tried to reconnect, it experienced the same problem. I am pretty sure that the problem is being behind the institution firewall, because when I unplugged my laptop from the ethernet cable and connected it to a public wi-fi network, it was able to connect, but when connected by ethernet only it times out during handshaking. The master is running Jenkins ver. 1.532. The slaves are running the slave.jar from http://mymasternode.tld:8080/jnlpJars/slave.jar. To be clear, the slave nodes CAN start a network connection with the master. I've set the master up to use a fixed port (33440) for JNLP slave agents, and made sure that port is made available in my EC2 security group. >From a machine at my institution I can do this (slightly edited): $ telnet mymasternode.tld 33440 Trying xx.xx.xx.xx... Connected to mymasternode.tld Escape character is '^]'. So that means in principle I can initiate a socket connection to the master. I try starting a slave agent like this: java -Djava.awt.headless=true -jar slave.jar -jnlpUrl http://mymasternode.tld:8080/computer/laptop/slave-agent.jnlp -secret LONGSECRETCODEGOESHERE I get this: Sep 25, 2013 4:55:55 PM hudson.remoting.jnlp.Main$CuiListener <init> INFO: Jenkins agent is running in headless mode. Sep 25, 2013 4:55:55 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Locating server among [http://mymasternode.tld:8080/] Sep 25, 2013 4:55:55 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to mymasternode.tld:33440 Sep 25, 2013 4:55:55 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Handshaking Sep 25, 2013 4:55:56 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connected On the master in $JENKINS_HOME/logs/slaves/myslavename, I see this in the log: NLP agent connected from /xx.xx.xx.xx <===[JENKINS REMOTING CAPACITY]===> .... and then after several minutes I see this: ERROR: Connection terminated ha:AAAAWC+LCAAAAAAAAP9b85aBtbiIQSmjNKU4P08vOT+vOD8mVc8DzHWtSE4tKMnMz/PLL0ldFVf2c+b/lb5MDAwVRQxSaBqcITRIIQMEMIIUFgAAckCEiWAAAAA=java.net.SocketException: Connection timed out at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(SocketInputStream.java:146) at java.io.BufferedInputStream.fill(BufferedInputStream.java:235) at java.io.BufferedInputStream.read(BufferedInputStream.java:254) at hudson.remoting.FlightRecorderInputStream.read(FlightRecorderInputStream.java:77) at java.io.ObjectInputStream$PeekInputStream.peek(ObjectInputStream.java:2271) at java.io.ObjectInputStream$BlockDataInputStream.peek(ObjectInputStream.java:2564) at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2574) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1314) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368) at hudson.remoting.Command.readFrom(Command.java:92) at hudson.remoting.ClassicCommandTransport.read(ClassicCommandTransport.java:71) at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:48) Back at the slave, it still says 'connected'. What is going on? OK, so I'm behind a firewall, but I've shown that I can initiate a socket connection, so why do inside-the-firewall slaves behave differently during the handshake than outside-the-firewall slaves which start right up just fine? Maybe something changed on my end but I don't know what it could be so not sure what to ask my IT folks about. Thought maybe someone here could help. Thanks, Dan -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
