No iptables or otherwise firewalls are setup on these nodes. One observation is that each node sends messages on with its own ring sequence number which is not converging.. I have seen that in a good cluster, when nodes respond with same sequence number, the membership is automatically formed. But in our case, that is not the case.
Example: we can see that one node sends Jun 07 07:55:04 corosync [pcmk ] notice: pcmk_peer_update: Transitional membership event on ring 71084: memb=1, new=0, lost=0 ..... Jun 07 07:55:16 corosync [pcmk ] notice: pcmk_peer_update: Transitional membership event on ring 71096: memb=1, new=0, lost=0 Jun 07 07:55:16 corosync [pcmk ] notice: pcmk_peer_update: Stable membership event on ring 71096: memb=1, new=0, lost=0 other node sends messages with its own numbers Jun 07 07:55:12 corosync [pcmk ] notice: pcmk_peer_update: Transitional membership event on ring 71088: memb=1, new=0, lost=0 Jun 07 07:55:12 corosync [pcmk ] notice: pcmk_peer_update: Stable membership event on ring 71088: memb=1, new=0, lost=0 ....... Jun 07 07:55:24 corosync [pcmk ] notice: pcmk_peer_update: Transitional membership event on ring 71100: memb=1, new=0, lost=0 Jun 07 07:55:24 corosync [pcmk ] notice: pcmk_peer_update: Stable membership event on ring 71100: memb=1, new=0, lost=0 Any idea why this happens, and why the seq. numbers from different nodes are not converging ? Thanks!
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