[jgroups-users] Coordinator killed during start-up

Hi guys,

Sorry for hammering but what do you guys think of this issue I stumbled upon ?

I have been investigating a problem we are experiencing with JGroups within our application, the application uses JDBC_PING
for discovery.

There are two nodes which are starting-up and the first node is killed after having written its record in the DB
 but *before* having set itself as the cluster's coordinator in the DB. When the second node starts up it hangs in
the while loop at line 63 of ClientGmsImpl, joinInternal()

https://github.com/belaban/JGroups/blob/master/src/org/jgroups/protocols/pbcast/ClientGmsImpl.java


// We didn't get any coord responses; all responses were clients. If I'm the first of the sorted clients
// I'll become coordinator. The others will wait and then retry the discovery and join process
if(coords == null) { // e.g. because we have all clients only
   if(firstOfAllClients(mbr, responses))
        return;
   continue;
}

In my scenario the sorting algorithm in firstOfAllClients()'s client's set contains the first node at the first
position therefore we will always continue waiting for the first node to set itself as the coordinator, this will
never happen as the first node isn't running anymore.

Thanks,
Pietro


Pietro Paolini
Consultant

Alfa
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