[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-31 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #34 from Antoine hashar Musso has...@free.fr ---
Is that still an issue? We can enable varnish log on the mobile cache as
described in Comment #17.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-31 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Chris McMahon cmcma...@wikimedia.org changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |FIXED

--- Comment #35 from Chris McMahon cmcma...@wikimedia.org ---
Between changing the timeout value for Mobile varnish, putting the first page
load in a try/catch clause in the automated browser test, and hopefully
reducing parsing time everywhere, I'm going to go ahead and close this.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-23 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #31 from Gerrit Notification Bot gerritad...@wikimedia.org ---
Change 103376 had a related patch set uploaded by Faidon Liambotis:
varnish: adjust first_byte_timeout for mobile too

https://gerrit.wikimedia.org/r/103376

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-23 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Gerrit Notification Bot gerritad...@wikimedia.org changed:

   What|Removed |Added

 Status|NEW |PATCH_TO_REVIEW

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-23 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #32 from Gerrit Notification Bot gerritad...@wikimedia.org ---
Change 103376 merged by Faidon Liambotis:
varnish: adjust first_byte_timeout for mobile too

https://gerrit.wikimedia.org/r/103376

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-23 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Faidon Liambotis fai...@wikimedia.org changed:

   What|Removed |Added

 Status|PATCH_TO_REVIEW |NEW

--- Comment #33 from Faidon Liambotis fai...@wikimedia.org ---
Chris, your theory sounds very plausible. As seen above, I fixed  merged your
patch to increase the timeout for mobile as well, which should help reduce the
occurence of this or even eliminate it.

It's not the underlying cause, though. On comment #6 I had the theory that is
lingering issues from #57026; the bug has been reopened since (by others :),
and Brad has investigated and identified another issue and has proposed a fix
that is yet still not merged.

What probably happens is that due to this bug, double-parsing occurs and
doubles the amount of time it takes to render large pages, such as Barack
Obama, which make response times pass the 30s Varnish timeout mark.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-20 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #28 from Chris McMahon cmcma...@wikimedia.org ---

I figured out what's going on here, and I created a workaround in the Mobile
browser tests for it.  Here is some more information: 

We have four tests that use the Barack_Obama page.  

The first test to hit the Barack_Obama page (or any number of other pages in
beta labs I assume) gets a 503 error. 

After that, the Barack_Obama page is in the Varnish cache, so the next three
tests to load the page succeed without error.  

At some point after the Mobile browser test build finishes, the version of the
page in Varnish expires, so the next browser test build encounters the 503
again. 

The workaround is to have the test load the page while disregarding any error,
then load the page again for real.  It is not a significant performance hit to
do this: 

Given /^I am on the (.+) article$/ do |article|
  begin
# put the page into the Varnish cache, avoid 503 errors
visit(ArticlePage, :using_params = {:article_name = article})
  rescue
  end
  visit(ArticlePage, :using_params = {:article_name = article})
end

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-20 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #29 from Arthur Richards aricha...@wikimedia.org ---
Glad we at least have a workaround for now, thanks Chris!

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-20 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #30 from Antoine hashar Musso has...@free.fr ---
Some entries from /data/project/logs/archive/slow-parse.log, that logs the
parsing time of articles that takes longer than X seconds

2013-12-18 06:56:11 deployment-apache32 enwiki: 34.53 Barack_Obama
2013-12-18 15:11:21 deployment-apache32 enwiki: 34.99 Barack_Obama
2013-12-18 15:11:35 deployment-apache33 enwiki: 14.24 Barack_Obama
2013-12-18 21:29:00 deployment-apache33 enwiki: 37.49 Barack_Obama
2013-12-18 21:29:11 deployment-apache33 enwiki: 13.17 Barack_Obama
2013-12-19 06:16:51 deployment-apache32 enwiki: 13.79 Barack_Obama
2013-12-19 06:16:51 deployment-apache32 enwiki: 48.87 Barack_Obama
2013-12-19 06:16:51 deployment-apache33 enwiki: 83.96 Barack_Obama
2013-12-19 17:27:58 deployment-apache33 enwiki: 43.98 Barack_Obama
2013-12-19 17:28:01 deployment-apache32 enwiki: 12.60 Barack_Obama
2013-12-19 21:32:00 deployment-apache32 enwiki: 41.26 Barack_Obama
2013-12-19 21:32:07 deployment-apache32 enwiki: 12.45 Barack_Obama
2013-12-20 06:09:31 deployment-apache33 enwiki: 35.53 Barack_Obama
2013-12-20 06:09:43 deployment-apache32 enwiki: 12.77 Barack_Obama
2013-12-20 14:43:16 deployment-apache33 simplewiki: 3.17  Barack_Obama

As of Fri Dec 20 19:58:03 UTC 2013

The text caches have 185 seconds first byte timeout.

The mobile caches apparently have a 35 seconds first byte timeout. If the 503
are mostly encountered for mobile tests, that would explain the 503.


One might want to talk about it with ops and find out why the timeout are
different on text and mobiles.  We might be able to raise on mobile for the
beta cluster (puppet change in manifests/role/cache.pp)

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-19 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #27 from Chris McMahon cmcma...@wikimedia.org ---
As of Dec 12 we see 503s on beta for Firefox and also for Chrome: 
https://wmf.ci.cloudbees.com/job/MobileFrontend-en.m.wikipedia.beta.wmflabs.org-linux-firefox/218/

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-12 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #22 from Antoine hashar Musso has...@free.fr ---
One issue is that puppet keep restarting Apache. I haven't correlated the
restarts mentioned in /data/project/logs/apache-error.log with the 503 errors
reported in varnish log.   Anyway filled a RT for ops to look at the puppet
conf RT #6500.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-12 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #23 from Antoine hashar Musso has...@free.fr ---
RT #6500 fixed, puppet is no more restarting Apache every time it runs. That
impacted production as well.  It was definitely the root cause for some of the
503 we were receiving albeit probably not the only cause.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-12 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #24 from Gerrit Notification Bot gerritad...@wikimedia.org ---
Change 100988 had a related patch set uploaded by Hashar:
beta: dont restart apache on fake mwsync

https://gerrit.wikimedia.org/r/100988

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-12 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Gerrit Notification Bot gerritad...@wikimedia.org changed:

   What|Removed |Added

 Status|NEW |PATCH_TO_REVIEW

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-12 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #25 from Gerrit Notification Bot gerritad...@wikimedia.org ---
Change 100988 merged by ArielGlenn:
beta: dont restart apache on fake mwsync

https://gerrit.wikimedia.org/r/100988

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-12 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Antoine hashar Musso has...@free.fr changed:

   What|Removed |Added

 Status|PATCH_TO_REVIEW |NEW

--- Comment #26 from Antoine hashar Musso has...@free.fr ---
Puppet is no more restarting Apache on beta cluster.

I have cleared the log file mentioned in Comment #17.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-11 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #17 from Antoine hashar Musso has...@free.fr ---
I have started a background varnishlog process on
deployment-cache-text1.pmtpa.wmflabs instance. Started as root using:

 nohup varnishlog -w /data/project/logs/varnish-cache-text1.log \
  21  /data/project/logs/varnishlogger-cache-text1.log 

The log file being on the shared directory, it is accessible from
deployment-bastion.pmtpa.wmflabs.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-11 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #18 from Antoine hashar Musso has...@free.fr ---
The log files is not that great for human consumption/filtering. One can review
the logs by connection on deployment-cache-text1 and then using

 varnishlog -r /data/project/logs/varnish-cache-text1.log

That will reply all the logs. Can later on filter out the 503 and hopefully
find out the reason for the failure.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-11 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #19 from Arthur Richards aricha...@wikimedia.org ---
Thanks so much Antoine, I am really happy you are on the path to getting to the
bottom of this :)

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-11 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Ryan Kaldari rkald...@wikimedia.org changed:

   What|Removed |Added

 CC||rkald...@wikimedia.org

--- Comment #20 from Ryan Kaldari rkald...@wikimedia.org ---
Almost all of my API request on beta labs are returning 503 errors today.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-11 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #21 from Ryan Kaldari rkald...@wikimedia.org ---
I'm getting the 503s in Firefox (regarding comment 15):

Request: GET
http://en.wikipedia.beta.wmflabs.org/wiki/This_page_has_issues?action=purge,
from 216.38.130.164 via deployment-cache-mobile01 frontend ([10.4.1.82]:80),
Varnish XID 2095358945
Forwarded for: 216.38.130.164
Error: 503, Service Unavailable at Thu, 12 Dec 2013 00:06:23 GMT

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-10 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #15 from Chris McMahon cmcma...@wikimedia.org ---
I took a look at the historical browser test failures and to my surprise
discovered that all of the 503 errors are happening in Chrome and none (or very
few) are happening in Firefox. 

I asked about this in #wikimedia-ops.  It may be that Chrome presents a header
that the varnish setup has a Vary on. 

I haven't yet investigated the headers being sent by MF in the browsers, but
this might be a factor in the ongoing 503s.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-10 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #16 from Matthew Flaschen mflasc...@wikimedia.org ---
(In reply to comment #15)
 I took a look at the historical browser test failures and to my surprise
 discovered that all of the 503 errors are happening in Chrome and none (or
 very few) are happening in Firefox. 

I've had it in Firefox (manual testing, not an automated browser test).  I
believe the examples I posted above were.  The next time it happens in Firefox,
I'll try to post the debugging info here.

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-09 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

dan d_ent...@yahoo.com changed:

   What|Removed |Added

 CC||d_ent...@yahoo.com

--- Comment #14 from dan d_ent...@yahoo.com ---
Request: POST http://commons.wikimedia.beta.wmflabs.org/wiki/Special:GWToolset,
from 83.163.0.31 via deployment-cache-text1 frontend ([10.4.1.133]:80), Varnish
XID 2142135504
Forwarded for: 83.163.0.31
Error: 503, Service Unavailable at Mon, 09 Dec 2013 20:20:02 GMT

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[Bug 57249] intermittent 503 errors

2013-12-06 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #11 from Antoine hashar Musso has...@free.fr ---
On beta I had a 503 on http://en.m.wikipedia.beta.wmflabs.org/wiki/Barack_Obama

Error: 503, Service Unavailable at Fri, 06 Dec 2013 11:04:16 GMT

The related slow-parse.log entry is:

2013-12-06 11:04:25 deployment-apache33 enwiki: 43.42 Barack_Obama

Something is hitting a timeout but I have no idea which part exactly :(

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[Bug 57249] intermittent 503 errors

2013-12-06 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #12 from Bartosz DziewoƄski matma@gmail.com ---
Another report (just reopened) is bug 57026.

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[Bug 57249] intermittent 503 errors

2013-12-06 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #13 from Matthew Flaschen mflasc...@wikimedia.org ---
I'm not sure if it's the same underlying cause (we may or may not need a
separate bug).  However, the intermittent 503's on en.beta.wmflabs.org are not
limited to Barack Obama, or even long articles.

I've also gotten it just today trying to POST a new, one-sentence Draft (I'm
testing https://www.mediawiki.org/wiki/Draft_namespace on Beta), and trying to
create an account (accidentally left on the CAPTCHA if that matters).

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[Bug 57249] intermittent 503 errors on beta.wmflabs.org

2013-12-06 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Krinkle krinklem...@gmail.com changed:

   What|Removed |Added

Summary|intermittent 503 errors |intermittent 503 errors on
   ||beta.wmflabs.org

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[Bug 57249] intermittent 503 errors

2013-12-05 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #8 from Faidon Liambotis fai...@wikimedia.org ---
Is this still happening?

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[Bug 57249] intermittent 503 errors

2013-12-05 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #9 from Antoine hashar Musso has...@free.fr ---
I am not sure how to confirm. I was looking for some varnish metric in Ganglia
which would give us the number of backend requests that timeout but haven't
found such metric :(

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[Bug 57249] intermittent 503 errors

2013-12-05 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #10 from Chris McMahon cmcma...@wikimedia.org ---

This is still occurring as of 5 Dec.  A fresh request for the Barack Obama page
still often yields a 503 error.

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[Bug 57249] intermittent 503 errors

2013-12-04 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #7 from Andre Klapper aklap...@wikimedia.org ---
(In reply to comment #6)
 or the Labs infrastructure being overloaded and vCPUs running slower.

Reminded me of bug 57968 but that only refers to the non-HTTP Labs website.

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[Bug 57249] intermittent 503 errors

2013-12-03 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Jon jrob...@wikimedia.org changed:

   What|Removed |Added

 CC||jrob...@wikimedia.org

--- Comment #4 from Jon jrob...@wikimedia.org ---
In the meantime, can't we just reduce the size of the Barack Obama article to
get the tests to stop failing..?

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[Bug 57249] intermittent 503 errors

2013-12-03 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #5 from Arthur Richards aricha...@wikimedia.org ---
Just like we don't want to disable the tests because they keep failing and
generating noise, we should really get the underlying problem fixed rather than
come up with a workaround.

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[Bug 57249] intermittent 503 errors

2013-12-03 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #6 from Faidon Liambotis fai...@wikimedia.org ---
esams has nothing to do with betalabs -- betalabs runs exclusively on pmtpa and
there's no cross-datacenter traffic that would be affected by networking
issues.

I don't think anyone from ops has made any changes recently that would affect
the betalabs infrastructure. I haven't debugged this but my guess is that this
is either some underlying MediaWiki issue (lingering issues from #57026
perhaps?) that is making pages take longer to load, or the Labs infrastructure
being overloaded and vCPUs running slower.

In any case, I've made a change yesterday that would affect both production 
betalabs, increasing Varnish's  nginx's timeout to 180s to make it on par with
what PHP's max_execution_time is set to (these would be
https://gerrit.wikimedia.org/r/#/c/98612/ 
https://gerrit.wikimedia.org/r/#/c/98761/ ).

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[Bug 57249] intermittent 503 errors

2013-12-02 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

--- Comment #3 from Arthur Richards aricha...@wikimedia.org ---
I'm still getting occasional 503 errors on betalabs on the Barack Obama
article. This is causing a lot of noise as we have automated browser tests
failing as a result that use that article to test some things that historically
have broken on large articles.

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[Bug 57249] intermittent 503 errors

2013-11-26 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Arthur Richards aricha...@wikimedia.org changed:

   What|Removed |Added

 CC||aricha...@wikimedia.org

--- Comment #1 from Arthur Richards aricha...@wikimedia.org ---
Been seeing this more frequently yesterday and today, particularly on large
articles on mobile - eg
http://en.m.wikipedia.beta.wmflabs.org/wiki/Barack_Obama

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[Bug 57249] intermittent 503 errors

2013-11-26 Thread bugzilla-daemon
https://bugzilla.wikimedia.org/show_bug.cgi?id=57249

Andre Klapper aklap...@wikimedia.org changed:

   What|Removed |Added

   Priority|Unprioritized   |High
 CC||aklap...@wikimedia.org
   See Also||https://bugzilla.wikimedia.
   ||org/show_bug.cgi?id=57499

--- Comment #2 from Andre Klapper aklap...@wikimedia.org ---
(In reply to comment #1)
 Been seeing this more frequently yesterday and today, particularly on large
 articles on mobile

Refering to yesterday and today only, according to the Operations team (mailing
list), yesterday there were some serious network issues on the eqiad-esams link
(including packet loss). This produced site-wide outages in Europe.

Bug 57499 might be a very similar / same problem.

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