After an upgrade to Wildfly 10.0.0.CR5, tons of AMQ212034 activem q-discovery-group-thread-dg-group1 warnings

[salamont]

We are running a cluster of three Wildfly nodes in domain mode. Previously it was running on CR1 and CR3 without much problem (some of the problems seem to be fixed in CR5). Unfortunately, after the upgrade to CR5 we started to get tons of the following messages:

WARN  [org.apache.activemq.artemis.core.client] (activemq-discovery-group-thread-dg-group1) AMQ212034: There are more than one servers on the network broadcasting the same node id. You will see this message exactly once (per node) if a node is restarted, in which case it can be safely ignored. But if it is logged continuously it means you really do have more than one node on the same network active concurrently with the same node id. This could occur if you have a backup node active at the same time as its live node. nodeID=74f9ee9b-7aaf-11e5-8505-5d1b78c37514

Before the update there were just few of them sometimes after a node was freshly started, however how they are produced continually.

Our configuration files are enclosed below. Please, could you help? Thanks a lot.

[mnovak]

Hi Tomas,

this happens only if there are Artemis servers in cluster with the same ID. Artemis generates its ID at first start. Did you copy Artemis's journal directory among the servers? Or started the wildfly 10 server, stopped and then copied.

I'm not suire if it's possible to change ID of servers. Only way i'm aware to fix this is to delete Artemis journal directories and start again.

Thanks,

Mirek

[kryszard]

Thanks, Mirek, that helped me