example link https://wmatrix.googleplex.com/bvt-cq, we have 6 build since 9570.0.0.

https://chrome-internal-review.googlesource.com/c/370088/ introduce some empty suites:

[begin cts legacy]
# TODO(ihf): delete this section once we see the new suites below work and the
# ones here are not used on beta/stable branches anymore.

This CL cannot pass sanity test:
./suite_scheduler.py --sanity -f ~/chromiumos/chromeos-admin/puppet/modules/lab/files/autotest_cautotest/suite_scheduler.ini

WARNING:root:begin cts legacy is malformed: No event to |run_on|.
WARNING:root:ArcCtsDevMon is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevTue is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevWed is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevThu is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevFri is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevSat is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevSun is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaMon is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaTue is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaWed is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaThu is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaFri is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaSat is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaSun is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsQualSmallBetaSun is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsQualSmallBetaTue is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsQualSmallBetaThu is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsMediumDevSat is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsMediumDevWed is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:begin cts legacy is malformed: No event to |run_on|.
WARNING:root:ArcCtsDevMon is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevTue is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevWed is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevThu is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevFri is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevSat is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsDevSun is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaMon is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaTue is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaWed is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaThu is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaFri is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaSat is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsBetaSun is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsQualSmallBetaSun is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsQualSmallBetaTue is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsQualSmallBetaThu is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsMediumDevSat is malformed: `hour` is the trigger time that can only apply to nightly event.
WARNING:root:ArcCtsMediumDevWed is malformed: `hour` is the trigger time that can only apply to nightly event.

Made a temporary fix on wmtrix server. The test results are back.

@ihf - what's our long-term fix here? 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/whining/+/f6e2acc3f21e8b7c9eec4a8871a65f50381daacf

commit f6e2acc3f21e8b7c9eec4a8871a65f50381daacf
Author: xixuan <xixuan@chromium.org>
Date: Wed May 24 06:59:28 2017

wmatrix: skip suite_scheduler.ini parsing exception.

BUG= chromium:725104 
TEST=Ran on whining server.

Change-Id: I64078b8145e58fcc6089dec24634490bda713c7b
Reviewed-on: https://chromium-review.googlesource.com/510810
Commit-Ready: Xixuan Wu <xixuan@chromium.org>
Tested-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Dan Shi <dshi@google.com>

[modify] https://crrev.com/f6e2acc3f21e8b7c9eec4a8871a65f50381daacf/src/backend/get_schedule.py

"is the trigger time that can only apply to nightly event."

This is bogus as Weekly(TimedEvent) has a default hour
https://cs.corp.google.com/chromeos_public/src/third_party/autotest/files/site_utils/suite_scheduler/timed_event.py?sq&q=timedevent+package:%5Echromeos_public$&l=185

I can fix the empty suite.

I don't particularly care about the hours. They are supposed to work, but I am not going to fix the code. There may be more spikes in the lab.

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chromeos/chromeos-admin/+/d465f263d479f6fd6b68f55c107baa9d79fcb6f5

commit d465f263d479f6fd6b68f55c107baa9d79fcb6f5
Author: Ilja H. Friedel <ihf@chromium.org>
Date: Wed May 24 08:10:08 2017

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chromeos/chromeos-admin/+/d465f263d479f6fd6b68f55c107baa9d79fcb6f5

commit d465f263d479f6fd6b68f55c107baa9d79fcb6f5
Author: Ilja H. Friedel <ihf@chromium.org>
Date: Wed May 24 08:10:08 2017

yes, weekly event only support day, not hours.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/fc4f5545e83da0cffeb64403c6bc4ba71f9d0574

commit fc4f5545e83da0cffeb64403c6bc4ba71f9d0574
Author: Ilja H. Friedel <ihf@chromium.org>
Date: Mon May 29 10:28:26 2017

suite_scheduler: Add private suites to whitelist.

BUG= chromium:725104 
TEST=./suite_scheduler.py --sanity -f
    ~/cros_tot/chromeos-admin/puppet/modules/lab/files/autotest_cautotest/suite_scheduler.ini

Change-Id: I59ed60361c10842e85b54f6b56df23c8c8ef7d5b
Reviewed-on: https://chromium-review.googlesource.com/513516
Commit-Ready: Ilja H. Friedel <ihf@chromium.org>
Tested-by: Ilja H. Friedel <ihf@chromium.org>
Reviewed-by: Dan Shi <dshi@google.com>

[modify] https://crrev.com/fc4f5545e83da0cffeb64403c6bc4ba71f9d0574/site_utils/suite_scheduler/sanity.py

ChromeOS Infra P1 Bugscrub.

P1 Bugs in this component should be important enough to get weekly status updates.

Is this already fixed?  -> Fixed
Is this no longer relevant? -> Archived or WontFix
Is this not a P1, based on go/chromeos-infra-bug-slo rubric? -> lower priority.
Is this a Feature Request rather than a bug? Type -> Feature
Is this missing important information or scope needed to decide how to proceed? -> Ask question on bug, possibly reassign.
Does this bug have the wrong owner? -> reassign.

Bugs that remain in this state next week will be downgraded to P2.

ChromeOS Infra P1 Bugscrub.

Issue untouched in a week after previous message. Downgrading to P2.

Presumed fixed.