Resolve rendezvous race condition
Summary:
When running the ctr_mbl_feed, we've encountered hang issue related to the rendezvous handshake based on zeus. It was mitigated by this diff https://our.intern.facebook.com/intern/diff/D19167151/.
This diff resolves the race condition by adding a reference to the rendezvous handler.
Test Plan: x7340282797
Reviewed By: yifuwang
Differential Revision: D19627293
fbshipit-source-id: 560af289db8ef6cf8d6f101f95ec27d5a361fd04