> On Dec 4, 2014, at 2:06 PM, Chris Jones <[email protected]> wrote: > > This makes no sense. I don't believe I've oversubscribed the number of > gmond's on my server (around 150 maybe?). The gmetad server is running > RHEL 6.2, and my two gmond clients are running RHEL 6.5. The strange > thing is, it appears that only my RHEL 6.5 clients are having this > problem..... every other gmond client is either RHEL 5.x or SuSE 11.1 or > 11.2. > > I've googled this problem til I'm blue in the face, gone back through > the last few years of the ganglia-general mailing list archives as best > I could with keyword searches, consulted many of my system admin. > co-workers, and even tried using unicast instead of multicast (that > didn't make a difference either). Nothing seems to matter. > > There's got to be somebody out there reading this mailing list who's got > RHEL6.5 gmond clients. Anybody? Please? :)
We have a random array of systems falling somewhere between RHEL5.1 and RHEL6.6 and we don’t see any issues like you’re describing. Running gmond 3.6.0.. which is a little old, but only one dot release behind the latest and greatest. I am using unicast, but you said you tried that and saw the same issue so I don’t really have any suggestions on what to try next from ganglia’s perspective. 150 clients is not oversubscribing ganglia.. we have clusters with 300+ nodes in them. The fact that you can only see one host communicating with the gmetad server at a time is pretty suspicious, it points to some kind of network health issue. Do netmasks check out? Switch supports multicast properly? Jumbo frames enabled on some ports but not others? Is the switch saturated?
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