just before slave jenkins-slave-916wdt gets launched ...
executing pre-launch scripts ...
Apr 12, 2019 2:31:47 AM null
FINEST: Instance jenkins-slave-916wdt is running and ready...
Apr 12, 2019 2:31:47 AM null
INFO: Launching instance: jenkins-slave-916wdt
Apr 12, 2019 2:31:54 AM null
INFO: bootstrap
Apr 12, 2019 2:31:54 AM null
INFO: Getting keypair...
Apr 12, 2019 2:31:54 AM null
INFO: Using autogenerated keypair
Apr 12, 2019 2:31:54 AM null
INFO: Authenticating as jenkins
Apr 12, 2019 2:31:55 AM null
INFO: Connecting to 35.229.250.191 on port 22, with timeout 10000.
Apr 12, 2019 2:31:56 AM null
INFO: Failed to connect via ssh: There was a problem while connecting to 35.229.250.191:22
Apr 12, 2019 2:31:56 AM null
INFO: Waiting for SSH to come up. Sleeping 5.
Apr 12, 2019 2:32:01 AM null
INFO: Connecting to 35.229.250.191 on port 22, with timeout 10000.
Apr 12, 2019 2:32:01 AM null
INFO: Failed to connect via ssh: There was a problem while connecting to 35.229.250.191:22
Apr 12, 2019 2:32:01 AM null
INFO: Waiting for SSH to come up. Sleeping 5.
Apr 12, 2019 2:32:06 AM null
INFO: Connecting to 35.229.250.191 on port 22, with timeout 10000.
Apr 12, 2019 2:32:07 AM null
INFO: Connected via SSH.
Apr 12, 2019 2:32:07 AM null
INFO: connect fresh as root
Apr 12, 2019 2:32:07 AM null
INFO: Connecting to 35.229.250.191 on port 22, with timeout 10000.
Apr 12, 2019 2:32:07 AM null
INFO: Connected via SSH.
Apr 12, 2019 2:32:07 AM null
INFO: Copying agent.jar to: /tmp
Apr 12, 2019 2:32:09 AM null
INFO: Verifying: java -fullversion
bash: java: command not found
Apr 12, 2019 2:32:09 AM null
WARNING: Java is not installed.
Apr 12, 2019 2:32:09 AM null
INFO: Launching Jenkins agent via plugin SSH: java -jar /tmp/agent.jar
Apr 12, 2019 2:32:09 AM null
WARNING: Error getting exception Exception: java.io.IOException: SSH channel is closed