[Bug]: CRASH REPORT Process with 0 neighbours crashed with reason: bad argument in vmq_cluster_com:process_bytes/3 line 171 about vernemq

[ioolkos]

@ashtonian Thanks. I can't remember seing that last error line, will investigate.
Clearly, your cluster is out of sync since it does empty synchronization (certain batches, like 566, are always repeating).
States like that are introduced by cluster joins with non-empty histories. It's not clear what exact version you use; newer releases have mitigated some of the effects. The latest release has a configurable setting to completely prevent non-empty SWC nodes to join a cluster.
The only quick and clear procedure to resolve this is unfortunately a full reset of the cluster, ie. scaling down to 0 and up again. (be aware this might loose state in the cluster).

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