There's a weird return for afe.get_labels():

LABEL: board:* daemon not running. starting it now at tcp:5037 *
* daemon started successfully *

It's back. Lower priority to pri-1. will keep monitoring it.

Update: There's a bad devserver: 172.25.65.235 blocking suite scheduler. 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/fceb83f3ead1a1e689e24c63ff7ffb9978f49cc6

commit fceb83f3ead1a1e689e24c63ff7ffb9978f49cc6
Author: xixuan <xixuan@chromium.org>
Date: Fri May 26 16:05:55 2017

autotest: catch Exception when label is not matched to certain pattern.

BUG= chromium:726354 
TEST=Ran on cautotest (as a temp fix to save suite_scheduler)

Change-Id: I4e50e87b3d9ed9dae407a5a5a4ffc05b900b8cde
Reviewed-on: https://chromium-review.googlesource.com/516802
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Paul Hobbs <phobbs@google.com>
Commit-Queue: Xixuan Wu <xixuan@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>

[modify] https://crrev.com/fceb83f3ead1a1e689e24c63ff7ffb9978f49cc6/site_utils/suite_scheduler/board_enumerator.py