then the only thing you can do it is to enable the debug on the sshd server to see what happens with the connection (see https://en.wikibooks.org/wiki/OpenSSH/Logging_and_Troubleshooting), then open a regular ssh connection from the Jenkins instance to the Agent from command line and see what happens after 4 hours
El mié., 4 nov. 2020 a las 4:03, Ashish Sharma (<[email protected]>) escribió: > We have tried putting these on both side, but still facing same issue :( > > On Thursday, October 1, 2020 at 1:33:57 AM UTC+8 [email protected] > wrote: > >> ideally, on both sides, make it on one side usually is enough. >> >> El miércoles, 30 de septiembre de 2020 a las 3:22:00 UTC+2, >> [email protected] escribió: >> >>> Thanks, are these setting to be applied on master side or slave or both? >>> >>> On Wednesday, September 30, 2020 at 12:15:23 AM UTC+8 >>> [email protected] wrote: >>> >>>> >>>> - Why does agent tries to connect to master when its already >>>> connected? >>>> >>>> That suggests half-closed connections, it means that the agent loses >>>> the connection with the Jenkins instance but the FIN notification never >>>> arrived to the Jenkins instance so the connection is open in the Jenkins >>>> instance side. It could be related to networks equipment and the policies >>>> that have for open connections, the recommendation is to tune the TCP stack >>>> to keep those connections open with traffic see >>>> https://support.cloudbees.com/hc/en-us/articles/115001416548#7tcpretransmissiontimeoutossperhapsincrease >>>> >>>> El martes, 29 de septiembre de 2020 a las 10:47:22 UTC+2, >>>> [email protected] escribió: >>>> >>>>> Hi Team, We are using JNLP to connect Mac agent to Linux master node. >>>>> >>>>> Jenkins agent keeps disconnecting frequently, and we are getting below >>>>> logs in master. >>>>> >>>>> Can you please suggest how to resolve this? What are the steps to >>>>> further triage the same. >>>>> >>>>> Some of the questions we are trying to answer is: >>>>> >>>>> - What is EOFException? >>>>> - Why does agent tries to connect to master when its already >>>>> connected? >>>>> - Why does eventually the ping / connection fails? >>>>> >>>>> We keep seeing this pattern in logs too often and too frequently. Any >>>>> help would be appreciated. >>>>> >>>>> Results are same even if we try any of the below options: >>>>> >>>>> - Connected using *Launch agent from Browser* >>>>> - Connected by *starting automator* in Mac which runs shell/zsh to >>>>> run agent.jar >>>>> - Connected by running *plist* in Mac >>>>> >>>>> * Jenkins environment:* >>>>> >>>>> - Jenkins: 2.249.1 >>>>> - Master Node: Linux RHEL 8.1 >>>>> - Master Java Version: 1.8.0_242 >>>>> - Slave System: macOS Catalina, Version 10.15.6 >>>>> - Slave Java Version: 1.8.0_261 >>>>> >>>>> *Connection #xxx failed: java.io.EOFException Sep 29, 2020 2:45:21 AM >>>>> INFO hudson.TcpSlaveAgentListener$ConnectionHandler run Accepted >>>>> JNLP4-connect connection #xxx from x.x.x.x/x.x.x.x:57215 Sep 29, 2020 >>>>> 2:45:21 AM >>>>> INFO org.jenkinsci.remoting.protocol.impl.ConnectionHeadersFilterLayer on >>>>> Recv[JNLP4-connect connection from x.x.x.x/x.x.x.x:57215] Refusing headers >>>>> from remote: <agent_name> is already connected to this master. Rejecting >>>>> this connection.Sep 29, 2020 2:45:31 AM >>>>> INFO hudson.TcpSlaveAgentListener$ConnectionHandler runConnection #xxx >>>>> failed: java.io.EOFException Sep 29, 2020 2:45:31 >>>>> AM INFO hudson.TcpSlaveAgentListener$ConnectionHandler runAccepted >>>>> JNLP4-connect connection #xxx from x.x.x.x/x.x.x.x:57218 Sep 29, 2020 >>>>> 2:45:32 AM >>>>> INFO org.jenkinsci.remoting.protocol.impl.ConnectionHeadersFilterLayer >>>>> onRecv[JNLP4-connect connection from x.x.x.x/x.x.x.x] Refusing headers >>>>> from >>>>> remote: <agent_name> is already connected to this master. Rejecting this >>>>> connection.Sep 29, 2020 2:45:32 AM INFO hudson.slaves.ChannelPinger$1 >>>>> onDeadPing failed. Terminating the channel JNLP4-connect connection from >>>>> x.x.x.x/x.x.x.x:57015. java.util.concurrent.TimeoutException: Ping started >>>>> at 1601318492966 hasn't completed by 1601318732966 at >>>>> hudson.remoting.PingThread.ping(PingThread.java:134) at >>>>> hudson.remoting.PingThread.run(PingThread.java:90) * >>>>> >>>>> >>>>> >>>>> TIA >>>>> >>>>> >>>>> >>>> -- > You received this message because you are subscribed to a topic in the > Google Groups "Jenkins Users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/jenkinsci-users/LiRA5m-zEP4/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jenkinsci-users/c8522ac5-64f0-458f-b853-ac874d2ef6b6n%40googlegroups.com > <https://groups.google.com/d/msgid/jenkinsci-users/c8522ac5-64f0-458f-b853-ac874d2ef6b6n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Un Saludo Iván Fernández Calvo https://www.linkedin.com/in/iv%C3%A1n-fern%C3%A1ndez-calvo-21425033 -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-users/CAKo5QrosCksdRosvCze-S0cdxWJGXqyq5fFQsQK89WhoAqQNpA%40mail.gmail.com.
