Now, I just started having a node drop in and out, same behavior. And a new log entry to mark the behavior:
*WARN : org.graylog2.periodical.NodePingThread - Did not find meta info of this node. Re-registering.* -- You received this message because you are subscribed to the Google Groups "Graylog Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/graylog2/05543e5b-4a39-4413-aac0-8f8eb8ee0c25%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
