crash occr analise:
1.sharedated.update call many times in a short time(eg:3 times) to change a same name conf value to a->b->c->d.
2.sharedated sending 3 response to monitoring clients。a->b and b->c and c->d.
3.if b is destroyed and it's memory is reallocated and rewrited when client process the first message a->b, client's call lbox will crash.
solution:
conf b must be keeped before message(a->b) is processed by inc it's ref.
Any return value from host to client must use incref before send to client.