[rabbitmq-discuss] Cluster Join Failure

Mon Oct 24 22:38:31 BST 2011

Hello,

I've got a 2.5.1 cluster that was running on my laptop (OS X 10.7.2).
I upgraded to 2.6.1 and Mnesia locked up during the database upgrade
process. Restarting Rabbit caused a failure due to half-finished
upgrade (not sure why it was taking so long as there were no messages
in Mnesia at the time). Since there was no valuable data in Mnesia, I
went ahead and wiped out /var/lib/rabbitmq and restarted both nodes.
Both nodes came up correctly now, however now when I try to join
rabbit2 at Phantome to rabbit at Phantome, I get the following schema merge
error:

Clustering node rabbit2 at Phantome with [rabbit at Phantome,rabbit2 at Phantome] ...
Error: {unable_to_join_cluster,
           [rabbit at Phantome,rabbit2 at Phantome],
           {merge_schema_failed,
               "Incompatible schema cookies. Please, restart from old
backup.rabbit at Phantome =
[{name,schema},{type,set},{ram_copies,[]},{disc_copies,[rabbit at Phantome]},{disc_only_copies,[]},{load_order,0},{access_mode,read_write},{majority,false},{index,[]},{snmp,[]},{local_content,false},{record_name,schema},{attributes,[table,cstruct]},{user_properties,[]},{frag_properties,[]},{cookie,{{1319,492091,286375},rabbit at Phantome}},{version,{{3,0},{rabbit at Phantome,{1319,492118,596284}}}}],
rabbit2 at Phantome =
[{name,schema},{type,set},{ram_copies,[]},{disc_copies,[rabbit2 at Phantome]},{disc_only_copies,[]},{load_order,0},{access_mode,read_write},{majority,false},{index,[]},{snmp,[]},{local_content,false},{record_name,schema},{attributes,[table,cstruct]},{user_properties,[]},{frag_properties,[]},{cookie,{{1319,492095,479659},rabbit2 at Phantome}},{version,{{2,0},[]}}]\n"}}

I'm a little confused since both nodes should be empty and their
Mnesia recreated from scratch by Rabbit before the join. Thank you in
advance for your help.

-J