tree a14d46239378bc0fdb96c9303bf435202acfd66b
parent 75a9a8958e65dbdea95b7c83cf31216025c3d7b5
author Ray Milkey <ray@opennetworking.org> 1556045523 -0700
committer Ray Milkey <ray@opennetworking.org> 1556051910 +0000

Prevent unhandled exception if the executor is already shut down.

Change-Id: I63b2f093fea90d99c85cfe8ffa2a264eee56d981
(cherry picked from commit 5666f1d63253093c5761e8edf94fcd8e218c7b1f)