Le 7 janv. 2011 à 06:37, Jerry Krinock a écrit : > > On 2011 Jan 06, at 17:33, Dave Keck wrote: > >> Oh, `sudo launchctl bstree` might also be useful. > > Thank you, Dave. It was useful. It told me that my server port was "active" > (A). This confirms what the Client tells me, that the port is found, but > times out when connecting to it. Odd, though, that, if I sent messages > repeatedly, the Client would get a couple seconds of > kCFMessagePortReceiveTimeout errors and then after that, > kCFMessagePortSendTimeout errors. > > Thus knowing what to look for, I found the problem, which is that I was using > the same port name for two different transient tasks, but the port for the > second task was being created before the port for the first task was > invalidated and released. This was because I was invalidating and releasing > the port in the server's -dealloc method, which was running lazily when an > autorelease pool was released. > > Just for the record, the trick is that if you try to create a port while an > older port with the same name is invalidated but not yet deallocated, an > exception is raised and logged in the console. However if the older port is > still active, and then later invalidated and deallocated, you get this silent > failure, a nonresponsive port.
It is an implementation detail, but it appears that when you try to create a CFMachPort instance with a specified port name, the "create" function will check if an existing CFMachPort instance already exists for the specified mach_port, and return it if it exists. That's why you should let the system choose the port name, and not try to force it. -- Jean-Daniel _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
