~ # kubectl logs --container jnlp jenkins-slave-qbfnq-dmmd8
Warning: JnlpProtocol3 is disabled by default, use JNLP_PROTOCOL_OPTS to alter the behavior
Warning: SECRET is defined twice in command-line arguments and the environment variable
Warning: AGENT_NAME is defined twice in command-line arguments and the environment variable
Nov 08, 2018 11:11:54 AM hudson.remoting.jnlp.Main createEngine
INFO: Setting up agent: jenkins-slave-qbfnq-dmmd8
Nov 08, 2018 11:11:54 AM hudson.remoting.jnlp.Main$CuiListener <init>
INFO: Jenkins agent is running in headless mode.
Nov 08, 2018 11:11:54 AM hudson.remoting.Engine startEngine
INFO: Using Remoting version: 3.23
Nov 08, 2018 11:11:54 AM hudson.remoting.Engine startEngine
WARNING: No Working Directory. Using the legacy JAR Cache location: /home/jenkins/.jenkins/cache/jars
Nov 08, 2018 11:11:54 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Locating server among [http://jenkins-service:8080/]
Nov 08, 2018 11:11:54 AM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve
INFO: Remoting server accepts the following protocols: [JNLP4-connect, Ping]
Nov 08, 2018 11:11:54 AM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve
INFO: Remoting TCP connection tunneling is enabled. Skipping the TCP Agent Listener Port availability check
Nov 08, 2018 11:11:54 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Agent discovery successful
  Agent address: jenkins-service
  Agent port:    50000
  Identity:      24:e1:66:dc:61:8a:05:cf:65:25:46:d5:59:57:12:be
Nov 08, 2018 11:11:54 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Handshaking
Nov 08, 2018 11:11:54 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connecting to jenkins-service:50000
Nov 08, 2018 11:11:54 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Trying protocol: JNLP4-connect
Nov 08, 2018 11:11:54 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Remote identity confirmed: 24:e1:66:dc:61:8a:05:cf:65:25:46:d5:59:57:12:be
Nov 08, 2018 11:11:55 AM hudson.remoting.jnlp.Main$CuiListener status
INFO: Connected
Nov 08, 2018 11:12:02 AM org.jenkinsci.remoting.util.AnonymousClassWarnings warn
WARNING: Attempt to (de-)serialize anonymous class org.jenkinsci.plugins.gitclient.Git$1; see: https://jenkins.io/redirect/serialization-of-anonymous-classes/
Nov 08, 2018 11:12:06 AM org.jenkinsci.remoting.util.AnonymousClassWarnings warn
WARNING: Attempt to (de-)serialize anonymous class org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1; see: https://jenkins.io/redirect/serialization-of-anonymous-classes/