Wrong Time/Date display from plugin conflict

[Keira]

Hi there, I have an issue with the wrong date and time being displayed on the single event view. see – http://www.welovebrighton.com/event/barracudas-summer-holiday-camp/2015-08-15/
After some diagnosing its seems that its a conflict with the W3 Total Cache plugin as the times return to normal after deactivating.
Once the plugin is deactivated though my backend views of the calendar break and not all the content is loading. So Im stuck between a rock and a hard place. Do you have any ideas on resolving the conflict or why the pages break when its deactivated.
Many thanks

[Nico]

Hi Keira,

Thanks for reaching out to us! Sorry to hear about your incompatibility issue 🙁

Try reactivating W3 Total Cache and clear ‘All Caches’ and then deactivate it again. I guess that should at least make events works fine in the back-end.

First thing I would try to make them play nice is to add The Events Calendar add it to the ‘Cache exception list’. You might want to check out this series of articles about W3 Total Cache settings.

In some other cases deactivating the minify JS and CSS settings makes it right. This doesn’t seem to be one of those cases but you can give that a try as well!

Please let me know about how this goes,
Best,
Nico

[Keira]

Hi Nico.

I have an update for you. I’ve since removed any caching plugin entirely. Enabling, clearing cache, disabling, deleting + deleting any left over stuff in wp-content. To recap I’ve also enabled a default WP theme and disabled all the plugins except your plugins. Having done this there are still problems.

There are two noticeable issues. The incorrect date I think is just a consequence of the other. I think we’ll have more luck with this problem: In the backend, when adding or editing an event, the server doesn’t return the whole page. The returned markup just stops half way through; as if php has errored. It stops just after “Use Saved Venue” and presumably before a list of venues. Looking at the venues I can’t see anything out of the ordinary.

I have just contacted the hosting company to get the php errors log. Logs I have access to don’t show anything but maybe the hosting company can help there.

Something I can do, which you can probably help with, is identify where in the code this is being echo’d. Then backtrace to see where it’s erroring. Can you give me a hint where in the plugin/s to start? If it’s super complicated then we can wait to hear back from the hosting company.

Or any other suggestions?

Thanks

[Nico]

Hey Keira,

Thanks for following up on this, and also for trouble shooting this intensively!

In the backend, when adding or editing an event, the server doesn’t return the whole page.

Wow, that sounds like a thing to solve before continuing with the wrong date issue.

Please get back to me when you have some info on the PHP errors from your hosting. You can also enable PHP error display, to see those on the page itself.

Best,
Nico

[Keira]

So I’ve been talking to the hosting company. No errors are being logged. If we cause PHP or Apache errors they are logged. They’ve also upped the memory limit to 512mb, which I’d have thought is more than enough. We do have a lot of events. 4000+ at any one time including reoccurring events.

To recap..

– when editing or creating an event the page stops rendering half way through.
– Events > Settings page is completely blank. Nothing at all is returned from the server. If we disable the Calendar Events Pro and Calendar Events Community Events then we can access this page normally.
– when logged in, our ‘submit a user generated calendar event’ page also stops rendering half way through.

We have replaced the WP core and replaced the event calendar + community events plugins. We don’t any longer have access to download the events calendar pro plugin although disabling this plug on its own has no effect.

So what I think is happening is that your plugins don’t handle the number of events we have very well. I wouldn’t be surprised if recurring events exacerbated the problem.

I can disable all plugins, except the calendar events plugins, and navigate to a problem effected page. The page is better however they still don’t fully render. If I start enabling other plugins the problem pages get worse. If I enable enough plugins some effected pages become completely blank. Furthermore, I can enable a few lightweight plugins before it breaks but if I enable just one heavy duty plugin (e.g. Pods) the events calendar functionality breaks again.

Have you had problems before with performance with large number of events?

If you don’t think that’s the cause then there must be something else going on to cause the server to give up on rendering requests.

Please let me know what you think.

Thanks

[Nico]

Hi Keira,

Thanks a lot for following up on this, and sorry to hear we are still stuck with this 🙁

We’ve heard of different performance issues in the past, which are usually present in the front-end of the site -slow page views mainly. Some of them are due the high volume of events -mostly recurring-, in these cases using a cache solution or scaling the server infrastructure to a more adequate one. Do you consider that your actual server is up to the site growth? I’m not blaming your hosting company, just want to make sure you understand this can be a cause of the issue!

Before considering this a performance issue, I would like to fully discard conflicts with other plugins of the theme itself. Can you please follow the steps described in our Testing for conflicts guide? Maybe this could be tested in a development or staging environment?

Please let me know,
Best,
Nico

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