ffwd will block when there are multiple client threads #2
Description
I'm trying to run ffwd on several machines of mine, but find out that more than two clients will cause blocking on FFWD_EXEC. After some debugging, I find out that when there is concurrent FFWD_EXEC, all client threads will block on waiting the server's response, while server cannot receive any client's requests.
$ ./ffwd_sample -t 1 -s 2 -d 100 # this will run to completion
1 0.100 0.013
$ ./ffwd_sample -t 2 -s 2 -d 100 # this will block