when delete a node on line, change the nodes config file #ip of this node,
and do ctdb reloadnodes on other nodes,
then, other nodes may down because of node->pending_controls timeout can free invalid request, the backtrace:


  
daemon_control_destructor
talloc_free
daemon_control_callback
ctdb_control_timeout

in daemon_control_destructor:

if (state->node) {
   DLIST_REMOVE(state->node->pending_controls, state);
}

but the node is free ctb_reload_nodes_event,so here will be error,

i think it should do call ctdb_daemon_cancel_controls in ctb_reload_nodes_event,

like this:

 if (ctdb->nodes[i]->flags & NODE_FLAGS_DELETED) {
   ctdb_daemon_cancel_controls(ctdb, nodes[i]); //add this line
   continue;
}