$ kubectl logs jenkins-build-slave-9s49h Warning: JnlpProtocol3 is disabled by default, use JNLP_PROTOCOL_OPTS to alter the behavior Aug 07, 2017 1:01:33 PM hudson.remoting.jnlp.Main createEngine INFO: Setting up slave: jenkins-build-slave-9s49h Aug 07, 2017 1:01:33 PM hudson.remoting.jnlp.Main$CuiListener INFO: Jenkins agent is running in headless mode. Aug 07, 2017 1:01:33 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Locating server among [http://jenkins-service] Aug 07, 2017 1:01:33 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve INFO: Remoting server accepts the following protocols: [JNLP4-connect, JNLP-connect, Ping, JNLP2-connect] Aug 07, 2017 1:01:33 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Agent discovery successful Agent address: jenkins-service Agent port: 50000 Identity: 51:ac:fd:f7:69:94:53:62:f9:ac:43:6b:72:ff:e7:c2 Aug 07, 2017 1:01:33 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Handshaking Aug 07, 2017 1:01:33 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to jenkins-service:50000 Aug 07, 2017 1:01:33 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP4-connect Aug 07, 2017 1:01:34 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Remote identity confirmed: 51:ac:fd:f7:69:94:53:62:f9:ac:43:6b:72:ff:e7:c2 Aug 07, 2017 1:01:34 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connected Aug 07, 2017 1:04:29 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Terminated Aug 07, 2017 1:04:39 PM jenkins.slaves.restarter.JnlpSlaveRestarterInstaller$2$1 onReconnect INFO: Restarting agent via jenkins.slaves.restarter.UnixSlaveRestarter@43361483 Aug 07, 2017 1:04:40 PM hudson.remoting.jnlp.Main createEngine INFO: Setting up slave: jenkins-build-slave-9s49h Aug 07, 2017 1:04:40 PM hudson.remoting.jnlp.Main$CuiListener INFO: Jenkins agent is running in headless mode. Aug 07, 2017 1:04:40 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Locating server among [http://jenkins-service] Aug 07, 2017 1:04:41 PM org.jenkinsci.remoting.engine.JnlpAgentEndpointResolver resolve INFO: Remoting server accepts the following protocols: [JNLP4-connect, JNLP-connect, Ping, JNLP2-connect] Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Agent discovery successful Agent address: jenkins-service Agent port: 50000 Identity: 51:ac:fd:f7:69:94:53:62:f9:ac:43:6b:72:ff:e7:c2 Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Handshaking Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to jenkins-service:50000 Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP4-connect Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Remote identity confirmed: 51:ac:fd:f7:69:94:53:62:f9:ac:43:6b:72:ff:e7:c2 Aug 07, 2017 1:04:41 PM org.jenkinsci.remoting.protocol.impl.ConnectionHeadersFilterLayer onRecv INFO: [JNLP4-connect connection to jenkins-service/10.251.248.121:50000] Local headers refused by remote: Unknown client name: jenkins-build-slave-9s49h Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Protocol JNLP4-connect encountered an unexpected exception java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Unknown client name: jenkins-build-slave-9s49h at org.jenkinsci.remoting.util.SettableFuture.get(SettableFuture.java:223) at hudson.remoting.Engine.innerRun(Engine.java:385) at hudson.remoting.Engine.run(Engine.java:287) Caused by: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Unknown client name: jenkins-build-slave-9s49h at org.jenkinsci.remoting.protocol.impl.ConnectionHeadersFilterLayer.newAbortCause(ConnectionHeadersFilterLayer.java:375) at org.jenkinsci.remoting.protocol.impl.ConnectionHeadersFilterLayer.onRecvClosed(ConnectionHeadersFilterLayer.java:432) at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(ProtocolStack.java:832) at org.jenkinsci.remoting.protocol.FilterLayer.onRecvClosed(FilterLayer.java:287) at org.jenkinsci.remoting.protocol.impl.SSLEngineFilterLayer.onRecvClosed(SSLEngineFilterLayer.java:172) at org.jenkinsci.remoting.protocol.ProtocolStack$Ptr.onRecvClosed(ProtocolStack.java:832) at org.jenkinsci.remoting.protocol.NetworkLayer.onRecvClosed(NetworkLayer.java:154) at org.jenkinsci.remoting.protocol.impl.BIONetworkLayer.access$1500(BIONetworkLayer.java:48) at org.jenkinsci.remoting.protocol.impl.BIONetworkLayer$Reader.run(BIONetworkLayer.java:247) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at hudson.remoting.Engine$1$1.run(Engine.java:94) at java.lang.Thread.run(Thread.java:748) Suppressed: java.nio.channels.ClosedChannelException ... 7 more Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to jenkins-service:50000 Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Server reports protocol JNLP4-plaintext not supported, skipping Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Protocol JNLP3-connect is not enabled, skipping Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP2-connect Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Protocol JNLP2-connect encountered an unexpected exception java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Server didn't accept the handshake: at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at hudson.remoting.Engine.innerRun(Engine.java:385) at hudson.remoting.Engine.run(Engine.java:287) Caused by: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Server didn't accept the handshake: at org.jenkinsci.remoting.engine.JnlpProtocol2Handler.sendHandshake(JnlpProtocol2Handler.java:134) at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(LegacyJnlpProtocolHandler.java:162) at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(LegacyJnlpProtocolHandler.java:158) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at hudson.remoting.Engine$1$1.run(Engine.java:94) at java.lang.Thread.run(Thread.java:748) Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Connecting to jenkins-service:50000 Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Trying protocol: JNLP-connect Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener status INFO: Protocol JNLP-connect encountered an unexpected exception java.util.concurrent.ExecutionException: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Server didn't accept the handshake: at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at hudson.remoting.Engine.innerRun(Engine.java:385) at hudson.remoting.Engine.run(Engine.java:287) Caused by: org.jenkinsci.remoting.protocol.impl.ConnectionRefusalException: Server didn't accept the handshake: at org.jenkinsci.remoting.engine.JnlpProtocol1Handler.sendHandshake(JnlpProtocol1Handler.java:121) at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(LegacyJnlpProtocolHandler.java:162) at org.jenkinsci.remoting.engine.LegacyJnlpProtocolHandler$2.call(LegacyJnlpProtocolHandler.java:158) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at hudson.remoting.Engine$1$1.run(Engine.java:94) at java.lang.Thread.run(Thread.java:748) Aug 07, 2017 1:04:41 PM hudson.remoting.jnlp.Main$CuiListener error SEVERE: The server rejected the connection: None of the protocols were accepted java.lang.Exception: The server rejected the connection: None of the protocols were accepted at hudson.remoting.Engine.onConnectionRejected(Engine.java:484) at hudson.remoting.Engine.innerRun(Engine.java:448) at hudson.remoting.Engine.run(Engine.java:287)