Node Panics Due to a metaclust Return Step Error: RPC: Program Not Registered (6256220)

Problem Summary: When a cluster shutdown is performed, the UCMMD can go into a reconfiguration on one or more of the nodes if one of the nodes leaves the cluster slightly ahead of the UCMMD. When this occurs, the shutdown stops the rpc.md command on the node while the UCMMD is trying to perform the return step. In the return step, the metaclust command gets an RPC timeout and exits the step with an error, due to the missing rpc.mdcommd process. This error causes the UCMMD to abort the node, which might cause the node to panic.

Workaround: You can safely ignore this problem. When the node boots back up, Sun Cluster software detects this condition and allows the UCMMD to start, despite the fact that an error occurred in the previous reconfiguration.