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Would you mind giving a short feedback on what went wrong on your end? I have a weird situation where I usually get an UPID, .. but SOMETIMES I do get an empty string, but the task was still successfully queued by Proxmox. The problem is that in this case I never "know" when the task is finished...

Corosync 3 Coredump from today: http://www.blackmesa.at/resources/core.corosync.0.c04d10f2e780497981683c0105059fad.37980.1567776827000000.lz4 hope that helps :)

@spirit I installed systemd-coredump, .. so I expect to have dumps soon ;)

nope, the cluster broke :-/ back to the drawing board

How did I NOT think of this ... *sigh* ... thanks! I'm going to do that after taking libknet1-1.11-pve1 for a spin. That being said, I installed libknet1-1.11-pve1 from non-sub around 12 hours ago and the cluster did not fall apart yet, which is the longest period of time corosync3 survived...

Same here. Disabled IPv6 on the interfaces - still the same random crashes. Today I upgraded to libknet 1.10-pve2 from the enterprise repos, let's see if that changes anything.

For us (running 6.0-5 with corosync 3.0.2-pve2) this already was the (default?) setting and we have the stability issues nevertheless. But I'll try and disable IPv6 on the interface - let's see if that helps. Have to move the cluster interface to a dedicated NIC then, but that's probably a good...

Hard to say. We're on PVE6.0-5 with the same issue. We now introduced a really weird workaround where we use cron to: 1) start corosync every 5 minutes 2) restart pve-cluster - then let everything settle and let do proxmox its "job" 3) stop corosync again 4) start over in 4 minutes. It's a...

@RokaKen: besides the SEGV that happened yesterday, the whole issue is the same it seems, yes. Thanks for pointing that out - I stumbled upon the issue when I started to hunt down the coroync SEGV - but when the problems got worse this night I did not remember the thread. I keep this open for...

@dietmar: Thanks for reaching out. I followed your advice and opened a case on https://bugzilla.proxmox.com/show_bug.cgi?id=2326 a few minutes ago. For the sake of visibility and documentation: The problem seems to include KNET, at least tonight the cluster disintegrated again (without...

Hey guys, we updated from PVE5 to PVE6 recently and noticed that nodes on our 4-node cluster leave randomly. Checking pvecm status states that CMAP cannot be initialized, so I had a look at corosync on the failed node only to learn that it obviously segfaulted. This happened on 3 of 4 cluster...

Sorry for digging up this old thread, but we experience the exact same situation. The cluster consists of 4 nodes. Node 1 only shows cluster members 1, 2 and 3 All the other nodes show all cluster members (1, 2, 3 and 4). As you might have guessed, node 4 was added last. The problem is...