On Fri, Aug 23, 2013 at 8:33 AM, Jiang BIAN <[email protected]> wrote:

> Thanks for the link. But I think this is targeting the language variant
> related fix.
>

This is the root cause of that behavior you mentioned. (It only happens /
happened on zhwiki and maybe as well as some wikis with variants, right?)

-Liangent


>
> We actually observed stale cache in a wider range, see the bug entry:
> https://bugzilla.wikimedia.org/show_bug.cgi?id=46014
>
>
> On Thu, Aug 22, 2013 at 5:26 PM, Liangent <[email protected]> wrote:
>
> > On Fri, Aug 23, 2013 at 8:13 AM, Jiang BIAN <[email protected]>
> wrote:
> >
> > > We are actually crawling the HTML via bot, so the bug is not actually
> > fixed
> > > for non-login user, right?
> > >
> >
> > I can't think of a good way to fix the problem from this aspect besides
> > waiting for old cached page to expire, unless some sysadmin is happy to
> > nuke all existing Squid cached pages.
> >
> > However if you have a list of affected pages as you're crawling HTML,
> which
> > we don't have, you can simply purge them in batch and recrawl those
> pages.
> >
> >
> > > Could you share the bug's link?
> > >
> >
> > There was no bug created in bugzilla... I submitted a patch[1] directly
> to
> > fix the bug once it was spotted.
> >
> > [1] https://gerrit.wikimedia.org/r/#/c/76060/
> >
> > -Liangent
> >
> >
> > >
> > > Thanks
> > >
> > >
> > > On Thu, Aug 22, 2013 at 4:38 PM, Liangent <[email protected]> wrote:
> > >
> > > > On Fri, Aug 23, 2013 at 7:06 AM, Sumana Harihareswara <
> > > > [email protected]
> > > > > wrote:
> > > >
> > > > > On 08/01/2013 03:08 AM, Jiang BIAN <[email protected]> wrote:
> > > > > > Hi,
> > > > > >
> > > > > > I noticed some pages we crawled containing error message like
> this;
> > > > > >
> > > > > > <div id="mw-content-text" lang="zh-CN" dir="ltr"
> > > > > class="mw-content-ltr"><p
> > > > > > class="error">Failed to render property P373:
> > > > > > Wikibase\LanguageWithConversion::factory: given languages do not
> > have
> > > > the
> > > > > > same parent language</p>
> > > > > >
> > > > > >
> > > > > > But when I open the url in browser, there is no such message. And
> > > using
> > > > > > index.php can also get normal content without error messages.
> > > > > >
> > > > > > Here are examples you can retry:
> > > > > >
> > > > > > bad
> > > > > > $ wget 'http://zh.wikipedia.org/zh-cn/Google'
> > > > > >
> > > > > > good
> > > > > > $ wget 'http://zh.wikipedia.org/w/index.php?title=Google'
> > > > > >
> > > > > >
> > > > > > Looks like something is wrong on Wikipedia side, anything need to
> > > fix?
> > > > > >
> > > > > >
> > > > > >
> > > > > > Thanks
> > > > >
> > > > > I checked with Jiang Bian and found out that this is still
> happening
> > --
> > > > > can anyone help Google out here? :-)
> > > > >
> > > > > --
> > > > > Sumana Harihareswara
> > > > > Engineering Community Manager
> > > > > Wikimedia Foundation
> > > > >
> > > > > _______________________________________________
> > > > > Wikitech-l mailing list
> > > > > [email protected]
> > > > > https://lists.wikimedia.org/mailman/listinfo/wikitech-l
> > > > >
> > > >
> > > > There was a bug in some Wikibase version deployed in July which
> caused
> > > this
> > > > error, but a fix was backported soon and since then I've never seen
> any
> > > > similar error as a logged in user. If you still see some errors only
> > when
> > > > unlogged in at particular URLs (like what you described) now, it's
> > likely
> > > > that those URLs got cached in Squid when the bug was live... In this
> > case
> > > > purging those pages[1] should be able to fix the issue.
> > > >
> > > > [1] https://en.wikipedia.org/wiki/Wikipedia:Purge
> > > >
> > > > -Liangent
> > > > _______________________________________________
> > > > Wikitech-l mailing list
> > > > [email protected]
> > > > https://lists.wikimedia.org/mailman/listinfo/wikitech-l
> > > >
> > >
> > >
> > >
> > > --
> > > Jiang BIAN
> > >
> > > This email may be confidential or privileged.  If you received this
> > > communication by mistake, please don't forward it to anyone else,
> please
> > > erase all copies and attachments, and please let me know that it went
> to
> > > the wrong person.  Thanks.
> > > _______________________________________________
> > > Wikitech-l mailing list
> > > [email protected]
> > > https://lists.wikimedia.org/mailman/listinfo/wikitech-l
> > >
> > _______________________________________________
> > Wikitech-l mailing list
> > [email protected]
> > https://lists.wikimedia.org/mailman/listinfo/wikitech-l
> >
>
>
>
> --
> Jiang BIAN
>
> This email may be confidential or privileged.  If you received this
> communication by mistake, please don't forward it to anyone else, please
> erase all copies and attachments, and please let me know that it went to
> the wrong person.  Thanks.
> _______________________________________________
> Wikitech-l mailing list
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> https://lists.wikimedia.org/mailman/listinfo/wikitech-l
>
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