On 22 Nov 2016, at 09:00, Quinn The Eskimo! <eskimo1@apple.com> wrote:

Do you know the nature of these files? You can determine this using `lsof`, as described in this DevForums thread.

[Rick sent me the `lsof` output via email.] The `lsof` output shows 241 (!) file descriptors used for TCP sockets, all to the same host. That’s /way/ too high. Each session should have its own internal limit to the number of connections it opens to a given host; you can pin this using `HTTPMaximumConnectionsPerHost` (which is typically 4) but it’s also pinned by the internal workings on NSURLSession. It seems that this pin has come unstuck )-: How you modify `HTTPMaximumConnectionsPerHost` at all? Share and Enjoy -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/site_archiver%40lists... This email sent to site_archiver@lists.apple.com