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Issue 653870 link

Starred by 4 users
Status: WontFix
Owner:
█ nednguyen@chromium.org
Last visit > 30 days ago
Closed: Mar 2017
Cc:
█ kbr@chromium.org
rsesek@chromium.org
█ groby@chromium.org
ccameron@chromium.org
erikc...@chromium.org
█ shrike@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 2
Type: Bug-Regression

Blocked on:
issue 628022


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Chrome fails to launch on Mac, causing flaky Telemetry benchmark failures

Project Member Reported by eyaich@chromium.org, Oct 7 2016 
Looks like the browser may of had trouble launching, but this test seems to fail consistently a couple of times a day on this bot, it is worth investigation.

Builder page: https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%283%29?numbuilds=200

Link to failing step log:

https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%283%29/builds/4101/steps/system_health.memory_desktop/logs/stdio

Relevant log lines: 

WARNING:root:Proceed to kill the browser.
ERROR:root:Failure while starting browser backend.
Traceback (most recent call last):
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/browser/browser.py", line 55, in __init__
    self._browser_backend.Start()
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/desktop_browser_backend.py", line 294, in Start
    self._WaitForBrowserToComeUp()
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py", line 161, in _WaitForBrowserToComeUp
    raise exceptions.BrowserConnectionGoneException(self.browser, e)
BrowserConnectionGoneException: Timed out while waiting 60s for HasBrowserFinishedLaunching.
Found Minidump: False
Stack Trace:

If the test is disabled, please downgrade to Pri-2.

Comment 1 by eyaich@chromium.org, Oct 7 2016

Owner: nednguyen@chromium.org

Comment 2 by eyaich@chromium.org, Oct 7 2016

Summary: system_health.memory_desktop and other test failures on chromium.perf on Mac 10.10 Perf ({1, 2, and 3}) (was: system_health.memory_desktop failure on chromium.perf on Mac 10.10 Perf (3))
Seems that several tests are failing on Mac 10.10 Perf (1-3) with the same exact stack trace.  So maybe it is more than just the system_health benchmarks ( although it is the most common culprit)

system_health.common_desktop: https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%281%29/builds/4466
Log: https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%281%29/builds/4466/steps/system_health.common_desktop/logs/stdio


media.mse_cases and power.gpu_rasterization.top_25: https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%282%29/builds/4623

Comment 3 by nedngu...@google.com, Oct 7 2016

Cc: kbr@chromium.org
The browser failed to launch in this case, hence leaving no stack trace around. The screenshot also shows nothing got launched: https://console.developers.google.com/m/cloudstorage/b/chrome-telemetry-output/o/profiler-file-id_35-2016-10-07_02-59-4793950.png

+Ken: I think this is similar to what you have seen in the past. Not sure how do we even debug this kind of flakes.

Comment 4 by nedngu...@google.com, Oct 7 2016

Summary: Chrome fails to launch on Mac, causing flaky Telemetry benchmark failures (was: system_health.memory_desktop and other test failures on chromium.perf on Mac 10.10 Perf ({1, 2, and 3}))

Comment 6 by erikc...@chromium.org, Oct 7 2016 

Without more information, it's not really clear what's going wrong. Can you get system logs and/or chrome crash logs?

Are you saying that Chrome never outputs any log statements before dying?

Comment 7 by nedngu...@google.com, Oct 7 2016 

From telemetry log, it seems like Chrome did not output the crash dump. The Chrome log seems not very useful:
Traceback (most recent call last):
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/browser/browser.py", line 55, in __init__
    self._browser_backend.Start()
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/desktop_browser_backend.py", line 294, in Start
    self._WaitForBrowserToComeUp()
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/Mac_10_10_Perf__3_/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py", line 161, in _WaitForBrowserToComeUp
    raise exceptions.BrowserConnectionGoneException(self.browser, e)
BrowserConnectionGoneException: Timed out while waiting 60s for HasBrowserFinishedLaunching.
Found Minidump: False
Stack Trace:
********************************************************************************
	No crash dump found.
********************************************************************************
Standard output:
********************************************************************************
	2016-10-07 02:44:30.324 Google Chrome[28013:237592] NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7fb0a95875e0>
	2016-10-07 02:44:30.324 Google Chrome[28013:237592] Call stack:
	(
	    "+callStackSymbols disabled for performance reasons"
	)
********************************************************************************
WARNING:root:Cannot dump browser state: No browser.

System log is a good idea, you have any pointer for doing that?

Comment 8 by erikc...@chromium.org, Oct 7 2016 

The latest syslog is stored in /var/log/system.log. [resets at midnight, there's a log rotation].

Comment 9 by kbr@chromium.org, Oct 7 2016

Blockedon: 628022
Cc: erikc...@chromium.org ccameron@chromium.org
Interesting. This failure to launch the browser on macOS was seen earlier in  Issue 628022  and Emily added logic to the browser_test_launcher harness and tests to retry launching it.

Interestingly, after that logic was added, the only instances where we saw it take effect were essentially hardware failures; see https://bugs.chromium.org/p/chromium/issues/detail?id=628022#c37 .

Comment 10 by nedngu...@google.com, Oct 7 2016 

Ken: in this case, 49 pages were passing and only the last one failed to launch the browser. So it's unlikely to be hardware failures.
Project Member

Comment 11 by bugdroid1@chromium.org, Oct 7 2016 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/036c5f84288d362915dde6d44734c5a832cad108

commit 036c5f84288d362915dde6d44734c5a832cad108
Author: catapult-deps-roller <catapult-deps-roller@chromium.org>
Date: Fri Oct 07 23:51:08 2016

Roll src/third_party/catapult/ 0a0e13e30..455c70b71 (6 commits).

https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/0a0e13e30fe5..455c70b716be

$ git log 0a0e13e30..455c70b71 --date=short --no-merges --format='%ad %ae %s'
2016-10-07 nednguyen [telemetry] Add API for dumping system log when there is browser crash & implement it for Mac
2016-10-07 charliea [battor wrapper] Fix uploading of the serial log on Windows
2016-10-07 benjhayden Enforce One True Brace Style in eslint.
2016-10-07 alexandermont Make the clock sync metric report the latency between each pair of clock domains in the trace, regardless of which clock domain is chosen as the "model" clock domain.
2016-10-07 charliea Remove logging for  crbug.com/645106  now that it's closed
2016-10-07 lpy Add test for V8 GC objects stats table.

BUG= 653870 , 650395 

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=catapult-sheriff@chromium.org

Review-Url: https://codereview.chromium.org/2405543003
Cr-Commit-Position: refs/heads/master@{#424017}

[modify] https://crrev.com/036c5f84288d362915dde6d44734c5a832cad108/DEPS

Comment 12 by eyaich@chromium.org, Oct 10 2016 

Saw some additional failures on android this morning failing with the same root cause.  

https://build.chromium.org/p/tryserver.chromium.perf/builders/android_s5_perf_cq/builds/646

page_cycler_V2 failed a few times over the weekend with the same exact root cause.  Therefore it doesn't appear to just be an issue on mac.

Traceback (most recent call last):
  File "/b/c/b/android_s5_perf_cq/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/android_browser_finder.py", line 126, in Create
    browser_backend, self._platform_backend, self._credentials_path)
  File "/b/c/b/android_s5_perf_cq/src/third_party/catapult/telemetry/telemetry/internal/browser/browser.py", line 55, in __init__
    self._browser_backend.Start()
  File "/b/c/b/android_s5_perf_cq/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/android_s5_perf_cq/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/android_browser_backend.py", line 140, in Start
    self._WaitForBrowserToComeUp()
  File "/b/c/b/android_s5_perf_cq/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 75, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/android_s5_perf_cq/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py", line 161, in _WaitForBrowserToComeUp
    raise exceptions.BrowserConnectionGoneException(self.browser, e)
BrowserConnectionGoneException: Timed out while waiting 60s for HasBrowserFinishedLaunching.
Found Minidump: True

Comment 13 by eyaich@chromium.org, Oct 10 2016 

Issue 654099 has been merged into this issue.

Comment 14 by nedngu...@google.com, Oct 10 2016 

Thanks Emily, I filed  issue 654410  for the failure on Android. Since this happens during startup, I don't think it's specific to page_cycler_v2 benchmark.

Comment 15 by eyaich@chromium.org, Oct 14 2016 

So we are seeing this a lot more on mac today on the perf waterfall: 

Mac 10.11 Perf (4): 
blink_perf.bindings.reference
v8.browsing_desktop_ignitiion
failing build page: https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.11%20Perf%20%284%29/builds/4534

Mac 10.10 Perf (1):
system_health.common_desktop
https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%281%29/builds/4528


Mac 10.10 Perf (2):
page_cycler_v2.typical_25, v8.todomvc-ignition
https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%282%29/builds/4668

Mac 10.10 Perf (3):
 page_cycler_v2.top_10_mobile, tab_switching.five_blank_pages
https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%283%29/builds/4147

Mac 10.10 Perf (4):
 blink_perf.bindings, blink_perf.shadow_dom.reference,  power.trivial_pages.reference

https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%284%29/builds/6318


It is failing with the same exception but there does seem to be additional system info printed out with the exception now.  It is in the logs (https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%284%29/builds/6318/steps/blink_perf.bindings/logs/stdio), but I included the first bit of it.  

		WARNING:root:Cannot dump browser state: No browser.
Traceback (most recent call last):
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/telemetry/telemetry/internal/story_runner.py", line 79, in _RunStoryAndProcessErrorIfNeeded
    state.WillRunStory(story)
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 52, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/telemetry/telemetry/page/shared_page_state.py", line 225, in WillRunStory
    self._StartBrowser(page)
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 52, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/telemetry/telemetry/page/shared_page_state.py", line 185, in _StartBrowser
    self._browser = self._possible_browser.Create(self._finder_options)
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/desktop_browser_finder.py", line 68, in Create
    browser_backend, self._platform_backend, self._credentials_path)
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/telemetry/telemetry/internal/browser/browser.py", line 55, in __init__
    self._browser_backend.Start()
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 52, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/desktop_browser_backend.py", line 294, in Start
    self._WaitForBrowserToComeUp()
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 52, in traced_function
    return func(*args, **kwargs)
  File "/b/c/b/Mac_10_10_Perf__4_/src/third_party/catapult/telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.py", line 161, in _WaitForBrowserToComeUp
    raise exceptions.BrowserConnectionGoneException(self.browser, e)
BrowserConnectionGoneException: Timed out while waiting 60s for HasBrowserFinishedLaunching.
Found Minidump: False
Stack Trace:
********************************************************************************
	No crash dump found.
********************************************************************************
Standard output:
********************************************************************************
	2016-10-14 05:40:03.715 Google Chrome[5513:17561] NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7fe7b0f616c0>
	2016-10-14 05:40:03.715 Google Chrome[5513:17561] Call stack:
	(
	    "+callStackSymbols disabled for performance reasons"
	)
	[5513:41219:1014/054003:ERROR:ssl_client_socket_impl.cc(1105)] handshake failed; returned -1, SSL error code 1, net_error -100
	[5513:41219:1014/054003:ERROR:ssl_client_socket_impl.cc(1105)] handshake failed; returned -1, SSL error code 1, net_error -100
********************************************************************************
System log:
		code=1051
		userInfo={
			function = "-[KSProductKeyedStore(ProtectedMethods) errorForStoreError:productID:message:timeoutMessage:]";
			date = 2016-10-14 12:36:56 +0000;
			productids = {(
				"com.google.Chrome"
			)};
			filename = "KSProductKeyedStore.m";
			line = 91;
			NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore";
			NSUnderlyingError = <KSError:0x1004090c0
				domain="com.google.UpdateEngine.CommonErrorDomain"
				code=501
				userInfo={
					date = 2016-10-14 12:36:56 +0000;
					line = 372;
					filename = "KSKeyedPersistentStore.m";
					function = "-[KSKeyedPersistentStore(PrivateMethods) validateStorePath]";
					NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore";
					NSLocalizedDescription = "KSKeyedPersistentStore store directory does not exist.";
				}
			>;
			NSLocalizedDescription = "KSPersistentTicketStore failed to load tickets.";
		}
	>
Oct 14 05:36:56 build161-m1.golo.chromium.org ksadmin[5214]: Using ticket store: <KSPersistentTicketStore:0x1003223d0 store=<KSKeyedPersistentStore:0x1003226e0
		path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x100322c10
			path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:36:56 build161-m1.golo.chromium.org ksadmin[5214]: Creating a new ticket...
Oct 14 05:36:56 build161-m1.golo.chromium.org ksadmin[5214]: Created ticket <KSTicket:0x1003294a0
		productID=com.google.Chrome
		version=56.0.2890.0
		xc=<KSPathExistenceChecker:0x100325b30 path=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app>
		serverType=Omaha
		url=https://tools.google.com/service/update2
		creationDate=2015-09-15 00:22:33
		tagPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		tagKey=KSChannelID
		versionPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		versionKey=KSVersion
		cohort=1:1y5:g8l@0.05
		cohortName=Stable
		ticketVersion=1
	> in store /Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.
Oct 14 05:37:04 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent[5218]): Service exited with abnormal code: 255
Oct 14 05:37:04 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Oct 14 05:37:05 build161-m1.golo.chromium.org CoreServicesUIAgent[4752]: unexpected message <OS_xpc_error: <error: 0x7fff7505cc60> { count = 1, contents =
		"XPCErrorDescription" => <string: 0x7fff7505cf70> { length = 18, contents = "Connection invalid" }
	}>
Oct 14 05:37:05 build161-m1 kernel[0]: Google Chrome (map: 0xffffff8043e981e0) triggered DYLD shared region unnest for map: 0xffffff8043e981e0, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:06 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8043433c30) triggered DYLD shared region unnest for map: 0xffffff8043433c30, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:06 build161-m1.golo.chromium.org Google Chrome[5227]: NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7f8b5b65a7a0>
Oct 14 05:37:06 build161-m1.golo.chromium.org Google Chrome[5227]: Call stack:
	(
	    "+callStackSymbols disabled for performance reasons"
	)
Oct 14 05:37:06 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8042f95a50) triggered DYLD shared region unnest for map: 0xffffff8042f95a50, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5233]: Using ticket store: <KSPersistentTicketStore:0x100315e00 store=<KSKeyedPersistentStore:0x100316110
		path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x100316640
			path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5233]: KSKeyedPersistentStore store directory does not exist. [com.google.UpdateEngine.CommonErrorDomain:501 - '/Library/Google/GoogleSoftwareUpdate/TicketStore' - 'KSKeyedPersistentStore.m:372']
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5233]: KSPersistentTicketStore failed to load tickets. (productID: com.google.Chrome) [com.google.UpdateEngine.CoreErrorDomain:1051 - '/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore'] (KSKeyedPersistentStore store directory does not exist. - '/Library/Google/GoogleSoftwareUpdate/TicketStore' [com.google.UpdateEngine.CommonErrorDomain:501])
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5233]: ksadmin cannot access the ticket store:<KSUpdateError:0x1004106f0
		domain="com.google.UpdateEngine.CoreErrorDomain"
		code=1051
		userInfo={
			function = "-[KSProductKeyedStore(ProtectedMethods) errorForStoreError:productID:message:timeoutMessage:]";
			date = 2016-10-14 12:37:06 +0000;
			productids = {(
				"com.google.Chrome"
			)};
			filename = "KSProductKeyedStore.m";
			line = 91;
			NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore";
			NSUnderlyingError = <KSError:0x100200b80
				domain="com.google.UpdateEngine.CommonErrorDomain"
				code=501
				userInfo={
					date = 2016-10-14 12:37:06 +0000;
					line = 372;
					filename = "KSKeyedPersistentStore.m";
					function = "-[KSKeyedPersistentStore(PrivateMethods) validateStorePath]";
					NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore";
					NSLocalizedDescription = "KSKeyedPersistentStore store directory does not exist.";
				}
			>;
			NSLocalizedDescription = "KSPersistentTicketStore failed to load tickets.";
		}
	>
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5234]: Using ticket store: <KSPersistentTicketStore:0x100215f10 store=<KSKeyedPersistentStore:0x100216220
		path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x100216750
			path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5234]: Creating a new ticket...
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5234]: Created ticket <KSTicket:0x10021d1a0
		productID=com.google.Chrome
		version=56.0.2890.0
		xc=<KSPathExistenceChecker:0x10021c940 path=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app>
		serverType=Omaha
		url=https://tools.google.com/service/update2
		creationDate=2015-09-15 00:22:33
		tagPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		tagKey=KSChannelID
		versionPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		versionKey=KSVersion
		cohort=1:1y5:g8l@0.05
		cohortName=Stable
		ticketVersion=1
	> in store /Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.
Oct 14 05:37:13 build161-m1.golo.chromium.org CoreServicesUIAgent[4752]: unexpected message <OS_xpc_error: <error: 0x7fff7505cc60> { count = 1, contents =
		"XPCErrorDescription" => <string: 0x7fff7505cf70> { length = 18, contents = "Connection invalid" }
	}>
Oct 14 05:37:14 build161-m1 kernel[0]: Google Chrome (map: 0xffffff8041039e10) triggered DYLD shared region unnest for map: 0xffffff8041039e10, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:14 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8043e981e0) triggered DYLD shared region unnest for map: 0xffffff8043e981e0, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:14 build161-m1.golo.chromium.org Google Chrome[5241]: NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7ff548ea0e90>
Oct 14 05:37:14 build161-m1.golo.chromium.org Google Chrome[5241]: Call stack:
	(
	    "+callStackSymbols disabled for performance reasons"
	)
Oct 14 05:37:14 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8043e98780) triggered DYLD shared region unnest for map: 0xffffff8043e98780, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:14 build161-m1.golo.chromium.org ksadmin[5247]: Using ticket store: <KSPersistentTicketStore:0x100506ba0 store=<KSKeyedPersistentStore:0x100506eb0
		path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x1005073e0
			path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.

Comment 16 by aiolos@chromium.org, Oct 18 2016 

This is still happening on mac bots.
Ned, any update?

Comment 17 by kbr@chromium.org, Oct 18 2016

Cc: shrike@chromium.org groby@chromium.org rsesek@chromium.org
Components: UI>Browser
Labels: OS-Mac
+some more Mac folks -- would really appreciate any help figuring out what to do here.

It looks like the browser's infrequently failing to launch on macOS.

Comment 18 by rsesek@chromium.org, Oct 18 2016 

Can you look in ~/Library/Application Support/Google Chrome/Crashpad/completed to see if Crashpad has collected any reports?

Comment 19 by nedngu...@google.com, Oct 18 2016 

We also have some system log from https://uberchromegw.corp.google.com/i/chromium.perf/builders/Mac%2010.10%20Perf%20%284%29/builds/6318/steps/blink_perf.bindings/logs/stdio

System log:
		code=1051
		userInfo={
			function = "-[KSProductKeyedStore(ProtectedMethods) errorForStoreError:productID:message:timeoutMessage:]";
			date = 2016-10-14 12:36:56 +0000;
			productids = {(
				"com.google.Chrome"
			)};
			filename = "KSProductKeyedStore.m";
			line = 91;
			NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore";
			NSUnderlyingError = <KSError:0x1004090c0
				domain="com.google.UpdateEngine.CommonErrorDomain"
				code=501
				userInfo={
					date = 2016-10-14 12:36:56 +0000;
					line = 372;
					filename = "KSKeyedPersistentStore.m";
					function = "-[KSKeyedPersistentStore(PrivateMethods) validateStorePath]";
					NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore";
					NSLocalizedDescription = "KSKeyedPersistentStore store directory does not exist.";
				}
			>;
			NSLocalizedDescription = "KSPersistentTicketStore failed to load tickets.";
		}
	>
Oct 14 05:36:56 build161-m1.golo.chromium.org ksadmin[5214]: Using ticket store: <KSPersistentTicketStore:0x1003223d0 store=<KSKeyedPersistentStore:0x1003226e0
		path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x100322c10
			path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:36:56 build161-m1.golo.chromium.org ksadmin[5214]: Creating a new ticket...
Oct 14 05:36:56 build161-m1.golo.chromium.org ksadmin[5214]: Created ticket <KSTicket:0x1003294a0
		productID=com.google.Chrome
		version=56.0.2890.0
		xc=<KSPathExistenceChecker:0x100325b30 path=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app>
		serverType=Omaha
		url=https://tools.google.com/service/update2
		creationDate=2015-09-15 00:22:33
		tagPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		tagKey=KSChannelID
		versionPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		versionKey=KSVersion
		cohort=1:1y5:g8l@0.05
		cohortName=Stable
		ticketVersion=1
	> in store /Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.
Oct 14 05:37:04 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent[5218]): Service exited with abnormal code: 255
Oct 14 05:37:04 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Oct 14 05:37:05 build161-m1.golo.chromium.org CoreServicesUIAgent[4752]: unexpected message <OS_xpc_error: <error: 0x7fff7505cc60> { count = 1, contents =
		"XPCErrorDescription" => <string: 0x7fff7505cf70> { length = 18, contents = "Connection invalid" }
	}>
Oct 14 05:37:05 build161-m1 kernel[0]: Google Chrome (map: 0xffffff8043e981e0) triggered DYLD shared region unnest for map: 0xffffff8043e981e0, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:06 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8043433c30) triggered DYLD shared region unnest for map: 0xffffff8043433c30, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:06 build161-m1.golo.chromium.org Google Chrome[5227]: NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7f8b5b65a7a0>
Oct 14 05:37:06 build161-m1.golo.chromium.org Google Chrome[5227]: Call stack:
	(
	    "+callStackSymbols disabled for performance reasons"
	)
Oct 14 05:37:06 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8042f95a50) triggered DYLD shared region unnest for map: 0xffffff8042f95a50, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5233]: Using ticket store: <KSPersistentTicketStore:0x100315e00 store=<KSKeyedPersistentStore:0x100316110
		path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x100316640
			path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5233]: KSKeyedPersistentStore store directory does not exist. [com.google.UpdateEngine.CommonErrorDomain:501 - '/Library/Google/GoogleSoftwareUpdate/TicketStore' - 'KSKeyedPersistentStore.m:372']
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5233]: KSPersistentTicketStore failed to load tickets. (productID: com.google.Chrome) [com.google.UpdateEngine.CoreErrorDomain:1051 - '/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore'] (KSKeyedPersistentStore store directory does not exist. - '/Library/Google/GoogleSoftwareUpdate/TicketStore' [com.google.UpdateEngine.CommonErrorDomain:501])
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5233]: ksadmin cannot access the ticket store:<KSUpdateError:0x1004106f0
		domain="com.google.UpdateEngine.CoreErrorDomain"
		code=1051
		userInfo={
			function = "-[KSProductKeyedStore(ProtectedMethods) errorForStoreError:productID:message:timeoutMessage:]";
			date = 2016-10-14 12:37:06 +0000;
			productids = {(
				"com.google.Chrome"
			)};
			filename = "KSProductKeyedStore.m";
			line = 91;
			NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore";
			NSUnderlyingError = <KSError:0x100200b80
				domain="com.google.UpdateEngine.CommonErrorDomain"
				code=501
				userInfo={
					date = 2016-10-14 12:37:06 +0000;
					line = 372;
					filename = "KSKeyedPersistentStore.m";
					function = "-[KSKeyedPersistentStore(PrivateMethods) validateStorePath]";
					NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore";
					NSLocalizedDescription = "KSKeyedPersistentStore store directory does not exist.";
				}
			>;
			NSLocalizedDescription = "KSPersistentTicketStore failed to load tickets.";
		}
	>
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5234]: Using ticket store: <KSPersistentTicketStore:0x100215f10 store=<KSKeyedPersistentStore:0x100216220
		path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x100216750
			path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5234]: Creating a new ticket...
Oct 14 05:37:06 build161-m1.golo.chromium.org ksadmin[5234]: Created ticket <KSTicket:0x10021d1a0
		productID=com.google.Chrome
		version=56.0.2890.0
		xc=<KSPathExistenceChecker:0x10021c940 path=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app>
		serverType=Omaha
		url=https://tools.google.com/service/update2
		creationDate=2015-09-15 00:22:33
		tagPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		tagKey=KSChannelID
		versionPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		versionKey=KSVersion
		cohort=1:1y5:g8l@0.05
		cohortName=Stable
		ticketVersion=1
	> in store /Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.
Oct 14 05:37:13 build161-m1.golo.chromium.org CoreServicesUIAgent[4752]: unexpected message <OS_xpc_error: <error: 0x7fff7505cc60> { count = 1, contents =
		"XPCErrorDescription" => <string: 0x7fff7505cf70> { length = 18, contents = "Connection invalid" }
	}>
Oct 14 05:37:14 build161-m1 kernel[0]: Google Chrome (map: 0xffffff8041039e10) triggered DYLD shared region unnest for map: 0xffffff8041039e10, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:14 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8043e981e0) triggered DYLD shared region unnest for map: 0xffffff8043e981e0, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:14 build161-m1.golo.chromium.org Google Chrome[5241]: NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7ff548ea0e90>
Oct 14 05:37:14 build161-m1.golo.chromium.org Google Chrome[5241]: Call stack:
	(
	    "+callStackSymbols disabled for performance reasons"
	)
Oct 14 05:37:14 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8043e98780) triggered DYLD shared region unnest for map: 0xffffff8043e98780, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:14 build161-m1.golo.chromium.org ksadmin[5247]: Using ticket store: <KSPersistentTicketStore:0x100506ba0 store=<KSKeyedPersistentStore:0x100506eb0
		path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x1005073e0
			path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:14 build161-m1.golo.chromium.org ksadmin[5247]: KSKeyedPersistentStore store directory does not exist. [com.google.UpdateEngine.CommonErrorDomain:501 - '/Library/Google/GoogleSoftwareUpdate/TicketStore' - 'KSKeyedPersistentStore.m:372']
Oct 14 05:37:14 build161-m1.golo.chromium.org ksadmin[5247]: KSPersistentTicketStore failed to load tickets. (productID: com.google.Chrome) [com.google.UpdateEngine.CoreErrorDomain:1051 - '/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore'] (KSKeyedPersistentStore store directory does not exist. - '/Library/Google/GoogleSoftwareUpdate/TicketStore' [com.google.UpdateEngine.CommonErrorDomain:501])
Oct 14 05:37:14 build161-m1.golo.chromium.org ksadmin[5247]: ksadmin cannot access the ticket store:<KSUpdateError:0x100400710
		domain="com.google.UpdateEngine.CoreErrorDomain"
		code=1051
		userInfo={
			function = "-[KSProductKeyedStore(ProtectedMethods) errorForStoreError:productID:message:timeoutMessage:]";
			date = 2016-10-14 12:37:14 +0000;
			productids = {(
				"com.google.Chrome"
			)};
			filename = "KSProductKeyedStore.m";
			line = 91;
			NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore";
			NSUnderlyingError = <KSError:0x100208980
				domain="com.google.UpdateEngine.CommonErrorDomain"
				code=501
				userInfo={
					date = 2016-10-14 12:37:14 +0000;
					line = 372;
					filename = "KSKeyedPersistentStore.m";
					function = "-[KSKeyedPersistentStore(PrivateMethods) validateStorePath]";
					NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore";
					NSLocalizedDescription = "KSKeyedPersistentStore store directory does not exist.";
				}
			>;
			NSLocalizedDescription = "KSPersistentTicketStore failed to load tickets.";
		}
	>
Oct 14 05:37:14 build161-m1.golo.chromium.org ksadmin[5248]: Using ticket store: <KSPersistentTicketStore:0x10040bb00 store=<KSKeyedPersistentStore:0x10040be10
		path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x10040c340
			path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:14 build161-m1.golo.chromium.org ksadmin[5248]: Creating a new ticket...
Oct 14 05:37:14 build161-m1.golo.chromium.org ksadmin[5248]: Created ticket <KSTicket:0x1004129d0
		productID=com.google.Chrome
		version=56.0.2890.0
		xc=<KSPathExistenceChecker:0x100412230 path=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app>
		serverType=Omaha
		url=https://tools.google.com/service/update2
		creationDate=2015-09-15 00:22:33
		tagPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		tagKey=KSChannelID
		versionPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		versionKey=KSVersion
		cohort=1:1y5:g8l@0.05
		cohortName=Stable
		ticketVersion=1
	> in store /Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.
Oct 14 05:37:15 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent[5251]): Service exited with abnormal code: 255
Oct 14 05:37:15 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Oct 14 05:37:24 build161-m1.golo.chromium.org CoreServicesUIAgent[4752]: unexpected message <OS_xpc_error: <error: 0x7fff7505cc60> { count = 1, contents =
		"XPCErrorDescription" => <string: 0x7fff7505cf70> { length = 18, contents = "Connection invalid" }
	}>
Oct 14 05:37:24 build161-m1 kernel[0]: Google Chrome (map: 0xffffff803fe6d780) triggered DYLD shared region unnest for map: 0xffffff803fe6d780, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:25 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8043e981e0) triggered DYLD shared region unnest for map: 0xffffff8043e981e0, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:25 build161-m1.golo.chromium.org Google Chrome[5261]: NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7f8ed5854a50>
Oct 14 05:37:25 build161-m1.golo.chromium.org Google Chrome[5261]: Call stack:
	(
	    "+callStackSymbols disabled for performance reasons"
	)
Oct 14 05:37:25 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8042f95a50) triggered DYLD shared region unnest for map: 0xffffff8042f95a50, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:25 build161-m1.golo.chromium.org ksadmin[5268]: Using ticket store: <KSPersistentTicketStore:0x100408e60 store=<KSKeyedPersistentStore:0x100409170
		path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x1004096a0
			path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:25 build161-m1.golo.chromium.org ksadmin[5268]: KSKeyedPersistentStore store directory does not exist. [com.google.UpdateEngine.CommonErrorDomain:501 - '/Library/Google/GoogleSoftwareUpdate/TicketStore' - 'KSKeyedPersistentStore.m:372']
Oct 14 05:37:25 build161-m1.golo.chromium.org ksadmin[5268]: KSPersistentTicketStore failed to load tickets. (productID: com.google.Chrome) [com.google.UpdateEngine.CoreErrorDomain:1051 - '/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore'] (KSKeyedPersistentStore store directory does not exist. - '/Library/Google/GoogleSoftwareUpdate/TicketStore' [com.google.UpdateEngine.CommonErrorDomain:501])
Oct 14 05:37:25 build161-m1.golo.chromium.org ksadmin[5268]: ksadmin cannot access the ticket store:<KSUpdateError:0x100503bb0
		domain="com.google.UpdateEngine.CoreErrorDomain"
		code=1051
		userInfo={
			function = "-[KSProductKeyedStore(ProtectedMethods) errorForStoreError:productID:message:timeoutMessage:]";
			date = 2016-10-14 12:37:25 +0000;
			productids = {(
				"com.google.Chrome"
			)};
			filename = "KSProductKeyedStore.m";
			line = 91;
			NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore";
			NSUnderlyingError = <KSError:0x100501220
				domain="com.google.UpdateEngine.CommonErrorDomain"
				code=501
				userInfo={
					date = 2016-10-14 12:37:25 +0000;
					line = 372;
					filename = "KSKeyedPersistentStore.m";
					function = "-[KSKeyedPersistentStore(PrivateMethods) validateStorePath]";
					NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore";
					NSLocalizedDescription = "KSKeyedPersistentStore store directory does not exist.";
				}
			>;
			NSLocalizedDescription = "KSPersistentTicketStore failed to load tickets.";
		}
	>
Oct 14 05:37:25 build161-m1.golo.chromium.org ksadmin[5270]: Using ticket store: <KSPersistentTicketStore:0x100408290 store=<KSKeyedPersistentStore:0x1004085a0
		path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x100408ad0
			path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:25 build161-m1.golo.chromium.org ksadmin[5270]: Creating a new ticket...
Oct 14 05:37:25 build161-m1.golo.chromium.org ksadmin[5270]: Created ticket <KSTicket:0x100321dc0
		productID=com.google.Chrome
		version=56.0.2890.0
		xc=<KSPathExistenceChecker:0x100321680 path=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app>
		serverType=Omaha
		url=https://tools.google.com/service/update2
		creationDate=2015-09-15 00:22:33
		tagPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		tagKey=KSChannelID
		versionPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		versionKey=KSVersion
		cohort=1:1y5:g8l@0.05
		cohortName=Stable
		ticketVersion=1
	> in store /Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.
Oct 14 05:37:26 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent[5267]): Service exited with abnormal code: 255
Oct 14 05:37:26 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Oct 14 05:37:32 build161-m1.golo.chromium.org CoreServicesUIAgent[4752]: unexpected message <OS_xpc_error: <error: 0x7fff7505cc60> { count = 1, contents =
		"XPCErrorDescription" => <string: 0x7fff7505cf70> { length = 18, contents = "Connection invalid" }
	}>
Oct 14 05:37:33 build161-m1 kernel[0]: Google Chrome (map: 0xffffff8041039e10) triggered DYLD shared region unnest for map: 0xffffff8041039e10, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:33 build161-m1.golo.chromium.org Google Chrome[5283]: NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7fab0941e970>
Oct 14 05:37:33 build161-m1.golo.chromium.org Google Chrome[5283]: Call stack:
	(
	    "+callStackSymbols disabled for performance reasons"
	)
Oct 14 05:37:33 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8043e981e0) triggered DYLD shared region unnest for map: 0xffffff8043e981e0, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:33 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff803fe6d780) triggered DYLD shared region unnest for map: 0xffffff803fe6d780, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:33 build161-m1.golo.chromium.org ksadmin[5289]: Using ticket store: <KSPersistentTicketStore:0x10050cdb0 store=<KSKeyedPersistentStore:0x10050d0c0
		path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x10050d5f0
			path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:33 build161-m1.golo.chromium.org ksadmin[5289]: KSKeyedPersistentStore store directory does not exist. [com.google.UpdateEngine.CommonErrorDomain:501 - '/Library/Google/GoogleSoftwareUpdate/TicketStore' - 'KSKeyedPersistentStore.m:372']
Oct 14 05:37:33 build161-m1.golo.chromium.org ksadmin[5289]: KSPersistentTicketStore failed to load tickets. (productID: com.google.Chrome) [com.google.UpdateEngine.CoreErrorDomain:1051 - '/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore'] (KSKeyedPersistentStore store directory does not exist. - '/Library/Google/GoogleSoftwareUpdate/TicketStore' [com.google.UpdateEngine.CommonErrorDomain:501])
Oct 14 05:37:33 build161-m1.golo.chromium.org ksadmin[5289]: ksadmin cannot access the ticket store:<KSUpdateError:0x1003086f0
		domain="com.google.UpdateEngine.CoreErrorDomain"
		code=1051
		userInfo={
			function = "-[KSProductKeyedStore(ProtectedMethods) errorForStoreError:productID:message:timeoutMessage:]";
			date = 2016-10-14 12:37:33 +0000;
			productids = {(
				"com.google.Chrome"
			)};
			filename = "KSProductKeyedStore.m";
			line = 91;
			NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore";
			NSUnderlyingError = <KSError:0x100202220
				domain="com.google.UpdateEngine.CommonErrorDomain"
				code=501
				userInfo={
					date = 2016-10-14 12:37:33 +0000;
					line = 372;
					filename = "KSKeyedPersistentStore.m";
					function = "-[KSKeyedPersistentStore(PrivateMethods) validateStorePath]";
					NSFilePath = "/Library/Google/GoogleSoftwareUpdate/TicketStore";
					NSLocalizedDescription = "KSKeyedPersistentStore store directory does not exist.";
				}
			>;
			NSLocalizedDescription = "KSPersistentTicketStore failed to load tickets.";
		}
	>
Oct 14 05:37:33 build161-m1.golo.chromium.org ksadmin[5290]: Using ticket store: <KSPersistentTicketStore:0x100209350 store=<KSKeyedPersistentStore:0x100209660
		path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x100209b90
			path="/Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
Oct 14 05:37:33 build161-m1.golo.chromium.org ksadmin[5290]: Creating a new ticket...
Oct 14 05:37:33 build161-m1.golo.chromium.org ksadmin[5290]: Created ticket <KSTicket:0x100705720
		productID=com.google.Chrome
		version=56.0.2890.0
		xc=<KSPathExistenceChecker:0x100704e80 path=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app>
		serverType=Omaha
		url=https://tools.google.com/service/update2
		creationDate=2015-09-15 00:22:33
		tagPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		tagKey=KSChannelID
		versionPath=/b/c/b/Mac_10_10_Perf__4_/src/out/Release/Google Chrome.app/Contents/Info.plist
		versionKey=KSVersion
		cohort=1:1y5:g8l@0.05
		cohortName=Stable
		ticketVersion=1
	> in store /Users/chrome-bot/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.
Oct 14 05:37:36 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent[5293]): Service exited with abnormal code: 255
Oct 14 05:37:36 build161-m1 com.apple.xpc.launchd[1] (com.google.corp.gagent): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.
Oct 14 05:37:45 build161-m1.golo.chromium.org CoreServicesUIAgent[4752]: unexpected message <OS_xpc_error: <error: 0x7fff7505cc60> { count = 1, contents =
		"XPCErrorDescription" => <string: 0x7fff7505cf70> { length = 18, contents = "Connection invalid" }
	}>
Oct 14 05:37:45 build161-m1 kernel[0]: Google Chrome (map: 0xffffff8042f95d20) triggered DYLD shared region unnest for map: 0xffffff8042f95d20, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:45 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff8043e981e0) triggered DYLD shared region unnest for map: 0xffffff8043e981e0, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:45 build161-m1.golo.chromium.org Google Chrome[5303]: NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7fe3f25d63b0>
Oct 14 05:37:45 build161-m1.golo.chromium.org Google Chrome[5303]: Call stack:
	(
	    "+callStackSymbols disabled for performance reasons"
	)
Oct 14 05:37:45 build161-m1 kernel[0]: Google Chrome He (map: 0xffffff803d1abb40) triggered DYLD shared region unnest for map: 0xffffff803d1abb40, region 0x7fff92a00000->0x7fff92c00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.
Oct 14 05:37:46 build161-m1.golo.chromium.org ksadmin[5309]: Using ticket store: <KSPersistentTicketStore:0x1003148a0 store=<KSKeyedPersistentStore:0x100314bb0
		path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore"
		lockFile=<KSLockFile:0x1003150e0
			path="/Library/Google/GoogleSoftwareUpdate/TicketStore/Keystone.ticketstore.lock"
			locked=NO
		>
	>>.
....

Comment 20 by nedngu...@google.com, Oct 20 2016 

 Issue 657668  has been merged into this issue.

Comment 21 by rnep...@chromium.org, Mar 31 2017

Status: WontFix (was: Assigned)
Looking at logs I dont think this is an issue anymore. Closing as WontFix. If I'm wrong, reopen.
►

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