It looks like the pageviews dump for 2018-06-14 hour 12 is missing on

https://dumps.wikimedia.org/other/pageviews/2018/2018-06/

Possibly related to this change?

From: Analytics <[email protected]> on behalf of Andrew 
Otto <[email protected]>
Reply-To: "A mailing list for the Analytics Team at WMF and everybody who has 
an interest in Wikipedia and analytics." <[email protected]>
Date: Tuesday, June 12, 2018 at 2:35 PM
To: "A mailing list for the Analytics Team at WMF and everybody who has an 
interest in Wikipedia and analytics." <[email protected]>, Services 
Mailing List <[email protected]>, Internal discussion of WMF 
Research Team <[email protected]>, Research into Wikimedia 
content and communities <[email protected]>, 
"[email protected]" <[email protected]>, 
"[email protected]" 
<[email protected]>, 
"[email protected]" 
<[email protected]>, Operations LIst 
<[email protected]>
Subject: [Analytics] EventStreams offset reset - June 14 2018

Alright, we are now ready to do this.  New date:  June 14 2018, around 14:00 
UTC.



On Tue, Jun 5, 2018 at 9:31 AM, Andrew Otto 
<[email protected]<mailto:[email protected]>> wrote:
Hi,

We need to delay this switchover.  We’ve made some changes to the plan that 
require a bit more prep work.  Follow 
https://phabricator.wikimedia.org/T185225<https://urldefense.proofpoint.com/v2/url?u=https-3A__phabricator.wikimedia.org_T185225&d=DwMFaQ&c=gFTBenQ7Vj71sUi1A4CkFnmPzqwDo07QsHw-JRepxyw&r=XYb0dICC34f7i19sp8q3kXzrSJMkWJPZqcu5o_ACx1c&m=kbEBLIedzcmqhbAKl1o4w_UaOXCI7jEjzow7VfHG58c&s=-6WHYdlOeJJx-mP66KxQK3zvCOc9TxUncTy9nnNxG1E&e=>
 for more details.

I’ll reply with another announcement email when we set a new date.

- Andrew Otto
  Senior Systems Engineer, WMF



On Tue, May 15, 2018 at 11:43 AM, Andrew Otto 
<[email protected]<mailto:[email protected]>> wrote:
Hi all!

If you are not an active user of the EventStreams service, you can ignore this 
email.

​We’re in the process of 
upgrading<https://urldefense.proofpoint.com/v2/url?u=https-3A__phabricator.wikimedia.org_T152015&d=DwMFaQ&c=gFTBenQ7Vj71sUi1A4CkFnmPzqwDo07QsHw-JRepxyw&r=XYb0dICC34f7i19sp8q3kXzrSJMkWJPZqcu5o_ACx1c&m=kbEBLIedzcmqhbAKl1o4w_UaOXCI7jEjzow7VfHG58c&s=liwOKh6qZp7X591FC77JTa0pvnHzIWgLwrS5tWNATJk&e=>
 the backend infrastructure that powers the EventStreams service.  When we 
switch EventStreams to the new​ 
infrastructure<https://urldefense.proofpoint.com/v2/url?u=https-3A__phabricator.wikimedia.org_T185225&d=DwMFaQ&c=gFTBenQ7Vj71sUi1A4CkFnmPzqwDo07QsHw-JRepxyw&r=XYb0dICC34f7i19sp8q3kXzrSJMkWJPZqcu5o_ACx1c&m=kbEBLIedzcmqhbAKl1o4w_UaOXCI7jEjzow7VfHG58c&s=-6WHYdlOeJJx-mP66KxQK3zvCOc9TxUncTy9nnNxG1E&e=>,
 the ‘offsets’ AKA Last-Event-IDs will change.

Connected EventStreams SSE clients will reconnect and not be able to 
automatically consume from the exact position in the stream where they left 
off.  Instead, reconnecting clients will begin consuming from the latest 
messages in the stream.  This means that connected clients will likely miss any 
messages that occurred during the reconnect period.  Hopefully this will be a 
very small number of messages, as your SSE client should reconnect quickly.

This switch is scheduled to happen on June 5 2018, at around 17:30 UTC.

Let us know if you have any questions.

Thanks!
- Andrew Otto
  Senior Systems Engineer, WMF








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