Clear node reason if it goes from state UNKNOWN after registration (after

slurmctld restart).

src/slurmctld/node_mgr.c

@@ -1168,6 +1168,7 @@ validate_node_specs (char *node_name, uint32_t cpus,
 				node_ptr->node_state = NODE_STATE_ALLOCATED;
 			else
 				node_ptr->node_state = NODE_STATE_IDLE;
+			xfree(node_ptr->reason);
 		} else if (node_ptr->node_state == NODE_STATE_DRAINING) {
 			if (job_count == 0) {
 				last_node_update = time (NULL);