Connection Jenkins slave to master aborted : Ping response time is too long or timed out

Question

I am trying to establish a connection between Jenkins master (Linux Debian) and a slave (Windows 7). However, the connection is rapidly aborted with the following message: Ping response time is too long or timed out.

I can't find a solution to this problem. Could someone help me?

Answer 1

Have you confirmed you actually have connectivity between the master and the node (ping, traceroute, ssh) ?

JNLP (as noted in your comment) uses a random port > 50000 for the back comms. You may want to verify that too.

You might change the following to fixed port: Jenkins | Manage Jenkins | Configure Global Security Agents TCP port for inbound agents: [o] Random

See my clarification response on JNLP connections or alternatively, via DCOM. Also review Troubleshooting WMI Windows Agents (or start there).

Not sure, but you may want to try adjust one of the following System Properties:

hudson.ProxyConfiguration.DEFAULT_CONNECT_TIMEOUT_MILLIS [ 20000 ]
Connection timeout applied to connections e.g. to the update site. hudson.slaves.ChannelPinger.pingIntervalSeconds [ 300 ]
Frequency of pings between the master and slaves, in seconds

hudson.slaves.ChannelPinger.pingTimeoutSeconds [ 240 ]
Timeout for each ping between the master and slaves, in seconds

org.jenkinsci.main.modules.sshd.SSHD.idle-timeout [ undefined ]
Allows to configure the SSHD client idle timeout (value in milliseconds). Default value is 10min (600000ms).

Ps: did not notice this was an old Q. Advice still applicable.

Answer 2

Go to Manage Jenkins -> Configure Global Security, and under Project-based Matrix Authorization Strategy, enable “connect” in the “slave” section, for user “Anonymous”. This would leave you open to attack where someone emulates a slave (but in my case, on a private work network - that's not an issue.)