'No ajax navigation result handler found' when navigating quickly

[Thokoop]

Issue Brief

When using the pagination quickly it sometimes happens that the end-user is getting an error. This can be reproduced when quickly clicking through the pagination as soon as it is possible and the chances are increased on a slower network connection.

Also having a 'heavier' category page in general will increase the probability to get this error which is the case for our client (all configurable products with swatches and custom functionality). Note that we also have the pagination at the top of the product grid visible which also makes it 'easier' to quickly navigate to different pages without having to scroll down to the toolbar below the products first.

Environment

• PHP Version: 7.4
• Magento Version: 2.4.3
• Tweakwise Version: 4.1.0
• Tweakwise Export Version: 4.0.1
• Magento Deploy Mode: production (also tested on developer mode)

Steps to reproduce

1. Enable 'slow 3g' network throttling in Chrome Developer Tools (or similar in browser of choice)
2. Go to a category page like: https://tweakwise2-ce.emico.nl/women/tops-women.html
3. Click on an item in the pagination to go to another page as quickly as possible
4. When needed: repeat step 3 until error page shows up

Actual result

1. You will get redirected to https://tweakwise2-ce.emico.nl/tweakwise/ajax/navigation/?p=2 and a Magento error is shown: An error has happened during application run. See exception log for details.
2. When looking into the var/report you will (probably) find:

{"0":"No ajax navigation result handler found for ","1":"#1 Emico\\Tweakwise\\Controller\\Ajax\\Navigation\\Interceptor->___callParent() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:138]\n#2 Emico\\Tweakwise\\Controller\\Ajax\\Navigation\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:153]\n#3 Emico\\Tweakwise\\Controller\\Ajax\\Navigation\\Interceptor->___callPlugins() called at [generated\/code\/Emico\/Tweakwise\/Controller\/Ajax\/Navigation\/Interceptor.php:23]\n#4 Emico\\Tweakwise\\Controller\\Ajax\\Navigation\\Interceptor->execute() called at [vendor\/magento\/framework\/App\/Action\/Action.php:111]\n#5 Magento\\Framework\\App\\Action\\Action->dispatch() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:58]\n#6 Emico\\Tweakwise\\Controller\\Ajax\\Navigation\\Interceptor->___callParent() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:138]\n#7 Emico\\Tweakwise\\Controller\\Ajax\\Navigation\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:153]\n#8 Emico\\Tweakwise\\Controller\\Ajax\\Navigation\\Interceptor->___callPlugins() called at [generated\/code\/Emico\/Tweakwise\/Controller\/Ajax\/Navigation\/Interceptor.php:32]\n#9 Emico\\Tweakwise\\Controller\\Ajax\\Navigation\\Interceptor->dispatch() called at [vendor\/magento\/framework\/App\/FrontController.php:245]\n#10 Magento\\Framework\\App\\FrontController->getActionResponse() called at [vendor\/magento\/framework\/App\/FrontController.php:212]\n#11 Magento\\Framework\\App\\FrontController->processRequest() called at [vendor\/magento\/framework\/App\/FrontController.php:147]\n#12 Magento\\Framework\\App\\FrontController->dispatch() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:58]\n#13 Magento\\Framework\\App\\FrontController\\Interceptor->___callParent() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:138]\n#14 Magento\\Framework\\App\\FrontController\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [vendor\/magento\/module-store\/App\/FrontController\/Plugin\/RequestPreprocessor.php:99]\n#15 Magento\\Store\\App\\FrontController\\Plugin\\RequestPreprocessor->aroundDispatch() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:135]\n#16 Magento\\Framework\\App\\FrontController\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [vendor\/magento\/module-page-cache\/Model\/App\/FrontController\/BuiltinPlugin.php:71]\n#17 Magento\\PageCache\\Model\\App\\FrontController\\BuiltinPlugin->aroundDispatch() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:135]\n#18 Magento\\Framework\\App\\FrontController\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:153]\n#19 Magento\\Framework\\App\\FrontController\\Interceptor->___callPlugins() called at [generated\/code\/Magento\/Framework\/App\/FrontController\/Interceptor.php:23]\n#20 Magento\\Framework\\App\\FrontController\\Interceptor->dispatch() called at [vendor\/magento\/framework\/App\/Http.php:116]\n#21 Magento\\Framework\\App\\Http->launch() called at [vendor\/magento\/framework\/App\/Bootstrap.php:264]\n#22 Magento\\Framework\\App\\Bootstrap->run() called at [pub\/index.php:29]\n","url":"\/tweakwise\/ajax\/navigation\/?p=16","script_name":"\/index.php","report_id":"e4285f0c891dba815fbf81b8a582d1a50b4a8f0941b2217c70009fd901b51213"}

Expected result

• The pagination should not never break, even though when not all the tweakwise js is fully loaded

[Hnto]

@Thokoop we've added this to our backlog and will be working a fix shortly

[ar-vie]

Hi @Hnto , what is the status of this bug? Is there a commit available with the fix?