(replies inline) On Wed, 11 May 2016, Jo Shields wrote:
> Hi all, > > I'm observing a problem with our new Jenkins master, running on an Ubuntu > VM on a high-spec Azure instance - latency between master and workers is > *crazy* high. Like 30 plus seconds: > https://jenkins.mono-project.com/computer/. The SSH-based workers can > generally survive that, but the JNLP workers time out and kill running jobs > (we're using JNLP for non-cloud workers as it makes our network management > way simpler). And Jenkins does a pretty dreadful job of keeping track of > whether workers are connected or not, so I end up having to restart the > master to kick-start things. It's basically a nightmare. > > It seems we're not the only people running Jenkins on Azure showing obscene > response times, e.g. http://dotnet-ci.cloudapp.net/computer/ - so the > question is whether anyone else on the list has observed this, or (even > better) resolved it. > > The master isn't under high IO, network, memory or CPU load, seems well > supplied with entropy; and the failures don't seem to correlate with Java > GC pauses; so I'm not sure where to point the finger. That is some pretty awful latency. I'm cuhrious whether the master/agents are on different Virtual Networks? Have you also reached out to Azure support about this? Since this is primarily affecting the JNLP agents, I would be skeptical of what software-defined-networking stuff inside Azure might be doing to that traffic that it is not doing to SSH traffic. I would be surprised if the JNLP support in Jenkins were the culprit - R. Tyler Croy ------------------------------------------------------ Code: <https://github.com/rtyler> Chatter: <https://twitter.com/agentdero> % gpg --keyserver keys.gnupg.net --recv-key 3F51E16F ------------------------------------------------------ -- 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/20160511180024.GX30995%40blackberry.coupleofllamas.com. For more options, visit https://groups.google.com/d/optout.
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