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 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/f81d4870-df94-4bb9-8087-e882ad27a6fcn%40googlegroups.com.
