ERROR Connection is not established java lang IllegalStateException Connection is not established

Question

Hello everyone,

I configured all the settings to create Master Slave model in Jenkins. But my Jenkins not able to launch one new node. It shows me the below error.

ERROR: Connection is not established!
java.lang.IllegalStateException: Connection is not established!
at com.trilead.ssh2.Connection.getRemainingAuthMethods(Connection.java:988)
at com.cloudbees.jenkins.plugins.sshcredentials.impl.TrileadSSHPasswordAuthenticator.canAuthenticate(TrileadSSHPasswordAuthenticator.java:82)
at com.cloudbees.jenkins.plugins.sshcredentials.SSHAuthenticator.newInstance(SSHAuthenticator.java:218)
at com.cloudbees.jenkins.plugins.sshcredentials.SSHAuthenticator.newInstance(SSHAuthenticator.java:171)
at hudson.plugins.sshslaves.SSHLauncher.openConnection(SSHLauncher.java:863)
at hudson.plugins.sshslaves.SSHLauncher$1.call(SSHLauncher.java:435)
at hudson.plugins.sshslaves.SSHLauncher$1.call(SSHLauncher.java:422)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
[05/28/20 14:26:20] Launch failed - cleaning up connection
[05/28/20 14:26:20] [SSH] Connection closed.

How can I avoid this error?

Answer 1

Hi@akhtar,

This error may occur because of network connectivity. So try to update your DNS server manually. Also make sure you have created remote directory in your node.