[JIRA] (JENKINS-60047) Jenkins hangs after network instability(packet loss)

[qiuchen.d...@magnetforensics.com (JIRA)]

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Qiuchen Dong created an issue   Jenkins / JENKINS-60047 Jenkins hangs after network instability(packet loss) Issue Type: Bug Assignee: Jeff Thompson Components: core, remoting Created: 2019-11-04 20:26 Environment: Jenkins 2.138, Jenkins 2.190.2; Windows 10 Priority: Major Reporter: Qiuchen Dong We seem to have some network instability. Every week or so, all our agents disconnect from Jenkins and Jenkins becomes unresponsive. Jenkins needs to be restarted afterwards.  Looking at build logs, they all seem to disconnect at the same time (possibly due to network load). Jenkins logs are not showing any errors.   I've managed to reproduce similar symptoms with a local version of jenkins simulating a bad network: 1. Have default jenkins instance running on localhost ("java -Xrs -Xmx256m -Dhudson.lifecycle=hudson.lifecycle.WindowsServiceLifecycle -jar jenkins.war --httpPort=12000") 2. Open the jenkins webpage and login to landing page 25 times (chrome) 3. Use Clumsy 0.2 to drop all packets for 40s on localhost TCP - IPV4 Expected Result: Jenkins webpage loads after we stop dropping packets Actual Result: Jenkins webpage is unresponsive. Agents cannot no longer connect through JNLP3 or JNLP4 Add Comment   This message was sent by Atlassian Jira (v7.13.6#713006-sha1:cc4451f) -- You received this message because you are subscribed to the Google Groups "Jenkins Issues" group. To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-issues+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-issues/JIRA.202876.1572899180000.8646.1572899220198%40Atlassian.JIRA.