On Wednesday, April 15, 2020 at 2:06:19 AM UTC-4 monger_39 wrote:
> Hey Jeff, > looks indeed like the 'standard' type of problems. Unfortunately in our > network, I do not have the > privileges to do anything much. Not that that would help much, since I'm > only a simple SW engineer, > not a network specialist. > The tip to try another agent connection is a good one though. Will try > that. > > I have been running on JNLP for a while. Is it going to be deprecated? Should I prepare to move to SSH? > thx again, David > > On Tuesday, April 14, 2020, 07:52:18 PM GMT+2, Jeff Thompson < > jtho...@cloudbees.com> wrote: > > > Unfortunately, it's really hard to say. Possibilities include resource > contention, such as CPU or networking, anything in the middle, such as load > balancers, firewalls, etc., network or system configuration. I heard of one > a while back that ended up being connected to IP table definition. Can't > remember if that was related to docker containers or full VMs. I've heard > that there have been some common problems in some VM environments, but I > don't know what environments or issues specifically. Maybe VMotion. Maybe > the network gets overloaded, especially between VMs. Or interactions > between loads on different VMs. I'm not as familiar with the current state, > but in the past in other environments I have seen more interference between > VMs than expected. > > It comes down to standard troubleshooting sorts of behavior. Try to catch > the problem. Gather information about different occurrences. Try to isolate > any commonalities. Isolate a system for reproduction. > > You could try a different type of agent, such as an SSH Agent. The > behavior might be different. I've heard recently that Microsoft's SSHD > implementation works well. > > Good luck on troubleshooting > > Jeff > On 4/14/20 8:31 AM, 'monger_39' via Jenkins Users wrote: > > Hi Jeff, > thx. Last week I disabled the ping-thread on master and slaves by setting > the interval to '-1'. > Unfortunately, over the weekend, again one of the slaves (even though the > jobs kept on running), > went into 'offline' mode. It seems indeed that this does not solve the > issue. Or, iow I think it means > that the disconnect was not caused by the ping-thread(s) timing out. > > Which puts me to the challenge to figure out what could be this 'external > someting' that you mention > that would break the remoting. And I honestly have no idea how to tackle > that yet. > The master, as well as the slave are Windows server VM's running 6 > executor slots each. The > tests we are running heavily use TCP communication. > > Any idea how to tackle this ? > > thx, M. > On Thursday, April 9, 2020, 10:53:48 PM GMT+2, Jeff Thompson > <jtho...@cloudbees.com> wrote: > > > On 4/7/20 11:46 PM, 'monger_39' via Jenkins Users wrote: > > Hi, > in my Jenkins I am regularly facing master/slave connection drops with a > message like: > > hudson.remoting.ChannelClosedException: Channel "unknown": Remote > call on JNLP4-connect connection from IP/IP:58344 failed. > The channel is closing down or has closed down. > > Usually these are caused by something external to the Remoting > communication protocol. Most often by something in the system or networking > environment. Sometimes by some bad interaction between plugins that ends up > impacting the channel. > > Your best approach is to figure out where these disconnects originate and > resolve the issue. > > > I have seen a lot of bug-reports on this. For most, a workaround is > advised by disabling the Ping-Thread through setting: > > You should be cautious about changing the ping settings or disabling it > entirely. It can cause some weird and unexpected behaviors. If you do > change the settings, I recommend you change one thing at a time and > evaluate the results. If it doesn't make any difference, restore it to its > default setting. > > And, is there also a slave setting for the timeoutvalue? > > It depends on how you launch the agent. Remoting system properties are > described at > https://github.com/jenkinsci/remoting/blob/master/docs/configuration.md > > (naming for all these settings does not look to be very consistent...) > > Unfortunately, that's the case. > > Jeff Thompson > > -- > 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 jenkinsci-use...@googlegroups.com. > To view this discussion on the web visit > > https://groups.google.com/d/msgid/jenkinsci-users/ab43b555-176c-4834-e125-fb66ff612f4d%40cloudbees.com > > <https://groups.google.com/d/msgid/jenkinsci-users/ab43b555-176c-4834-e125-fb66ff612f4d%40cloudbees.com?utm_medium=email&utm_source=footer> > > . > -- > 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 jenkinsci-use...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jenkinsci-users/1263552947.287750.1586874699662%40mail.yahoo.com > > <https://groups.google.com/d/msgid/jenkinsci-users/1263552947.287750.1586874699662%40mail.yahoo.com?utm_medium=email&utm_source=footer> > . > > -- > 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 jenkinsci-use...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jenkinsci-users/98d316ef-0bd0-d706-16ff-b8f9d409d900%40cloudbees.com > > <https://groups.google.com/d/msgid/jenkinsci-users/98d316ef-0bd0-d706-16ff-b8f9d409d900%40cloudbees.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Jenkins Users" group. 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