PHP warnings when calling method RulesEventSet::rebuildEventCache()

I have the same issue on 7.x-2.1? Interestingly, this didn't appear until after I migrated my Drupal install to a new server (which has an identical configuration).

Just had the similar situation to ridgekuhn. Moved servers, started throwing errors.

Flushing cache once cleared it up.

Sorry, forgot to update! The errors went away for me, I believe flushing the cache as nicoz recommends is what did the trick, but it's been a few days.

Going to close. Reopen if issue persists.

Since clearing cache, the issue has not returned for me. If it still doesn't work for you, then, as per my previous post. Reopen it. I don't need the lecture. thanks.

We had also been experiencing this problem.

We discovered that if the Rules cache was empty we were unable to clear the cache. We had the following error:
Error: Class 'RulesEventSet' not found in sites/all/modules/contrib/rules/rules.module, line 257

After commenting out this line clearing the cache was successful.

We then tested clearing the cache with this line uncommented again and it was successful, suggesting that after the rules cache had been "filled" we were able to clear the caches.

Clearing the cache isn't fixing this issue, just hiding it.

Have just seen the error mentioned in #7 from a fresh D7.14 install. I installed a whole load of modules all at the same time and got that error and wasn't able to recover from it. Commenting the offending line just moved the error to further down the code.

I have since followed exactly the same procedure again and had no problem however. Perhaps not much help but I wonder if it may be to do with the order in which the modules are enabled? The complete list of modules enabled was as follows:

Administration menu, Administration menu Toolbar style, CCK, Field UI, Field, Field SQL storage, Chaos tools, Custom content panes, Date, Date API, Date All Day, Date Popup, Date Repeat API, Date Repeat Field, Date Validation, Date Views, Views, Display suite, Extras, Forms, Entity API, Entity tokens, Features, Field Validation, Libraries, Module filter, Page manager, Panels, Panels In-Place Editor, Mini panels, Panel nodes, Pathauto, Path, Token, Rules, Rules UI, Rules Scheduler, Search API, Views Bulk Operations, Views content panes, Views UI

#7 error

#1515962: Class 'RulesEventSet' not found

#1552382: Fatal error: Class 'RulesEventSet' not found

http://drupal.org/node/1816472

#1704520: Fatal error: Class 'RulesEventSet' not found in

...among others.

Expierncing it also, not sure if related to original reported issue

rules_watchdog is what causing the error. Considering how watchdog can be called very early due to errors, it seems reasonable it's been called before the file RulesEventSet is in has been added, and better to just skip rebuilding cache than causing this error imo.

#10: 1541888-rules-RulesEventSet-10.patch queued for re-testing.

rules_watchdog is what causing the error. Considering how watchdog can be called very early due to errors, it seems reasonable it's been called before the file RulesEventSet is in has been added, and better to just skip rebuilding cache than causing this error imo.

Sounds reasonable, but the hunk right now makes that very difficult to see. Can we detect this in hook_watchdog instead and bail out if rules is not fully loaded yet?

patch no longer applies

Well it still applies apparently as I just had to use it on my fresh install for Rules 2.7
So thank you for the patch :)

I've rerolled Hefox's Patch against the current state of the 7.x-2.x branch

I've also added a version which applies against the 7.x-2.7 release.

The patch for 2.7 resolved this problem for me, which appeared when I installed the References Integrity sandbox module.

I am now running this patch on our production site with rules 2.7

Flagging rtbc

Looks like fago's comment has not been addressed from #12.

Are there any plans to add this patch to the main branch? The current dev branch doesn't seem to have it.

2015, still coming up :(

Warning: Illegal offset type in isset or empty in RulesEventSet::rebuildEventCache() (line 716 of sites/all/modules/rules/includes/rules.plugins.inc).

Rules (rules) Module Enabled 7.x-2.3

:Edit 01:

Maybe it's significantly worse now . ? . ? .

Went to the Rules config page (/admin/config/workflow/rules) and got this:

Warning: Illegal offset type in RulesReactionRule->dependencies() (line 410 of sites/all/modules/rules/includes/rules.plugins.inc).
Warning: Illegal offset type in RulesReactionRule->dependencies() (line 410 of sites/all/modules/rules/includes/rules.plugins.inc).
Notice: Array to string conversion in format_string() (line 1550 of includes/bootstrap.inc).
Warning: Illegal offset type in RulesUIController->overviewTableRow() (line 260 of sites/all/modules/rules/ui/ui.controller.inc).
Warning: Illegal offset type in RulesUIController->overviewTableRow() (line 261 of sites/all/modules/rules/ui/ui.controller.inc).

:Edit 02:

Seems caused by Commerce License Billing, https://www.drupal.org/node/2631008

But should rules crash and burn because of bad data being passed to it?

Solution #15 works! Thanks!

#15 doesn't address #12.

Does suck that this bug has been open 4 years.

#15 worked for 7.x-2.9, although the line numbers were different.

Marked #2275963: Fatal error: Class 'RulesEventSet' not found in /sites/all/modules/rules/rules.module on line 391 as a duplicate.

Reroll #15 for dev.

@fago's concern from #12 has still not been addressed.

Patch number #25 doesn't fix the problem for me. I also agree with #12 and #26, and seem to have the same problem.