Due to the race window between the master's "disconnect" message and the
worker's "handle received" message, connections sometimes got stuck in
the pending handles queue when calling `worker.disconnect()` in the
master process.
The observable effect from the client's perspective was a TCP or HTTP
connection that simply stalled. This commit fixes that by closing open
handles in the master when the "disconnect" message is sent.
Fixes: https://github.com/nodejs/node/issues/3551
PR-URL: https://github.com/nodejs/node/pull/3677
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Fedor Indutny <fedor@indutny.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Ben Noordhuis