Cannot read property 'jqXHR' of undefined

I just did a minor change in the privacy policy but when I submitted the edit, it would not complete saving (the saving wheel kept spinning and spinning). While I was waiting, I went to the TOS (in a new browser tab) to do a change there too. After saving that edit without problems, I went back to the privacy policy, but the wheel was still spinning. So I went ahead and tried to edit the post again (in the same browser tab). Ironically, I found that the change was already made but I wasn’t sure whether it was really saved or whether I was just looking at the same unsaved editor content. So I clicked save to make sure it is saved. That’s when this error popped up.

Can you repro this @techapj?

I am unable to repro this error on latest Discourse version.

For what it’s worth, I just had this same issue with a recent Discourse version (commit c10941b, basically the stable branch from 2019-02-17, not a release).

I was able to reproduce it a few times, but then not anymore, and it’s the first time ever that I had this issue. So very much an edge case …

What happened:

  1. I did a major update to a complex wiki post (which is a Discourse manual we wrote for our purposes).

  2. As experienced by the OP, Discourse would not complete saving (the saving wheel kept spinning and spinning). I eventually cancelled the process.

  3. I tried to make the very same edit again, and this error popped up:

    TypeError: Cannot read property ‘jqXHR’ of undefined

    That was reproducible for several further attempts to make the same edit in this post.

  4. I tried to make an edit to a different post, and that went without problems. I tried to post the same edit that failed for the manual wiki as edit to the different post, and that worked without problems, too (so it does not seem to be connected to the posted content).

  5. I tried a small (few words) edit to the manual wiki where the original edit failed. That worked, but it took a long time (about two minutes).

  6. I tried the failed edit again on the manual wiki, and this time it worked. And all subsequent edits worked, too.

I found the following error log entries for the time and post where this issue happened:

(Edit: upon further inspection, that error in the logs seems rather unrelated as the log shows it also in multiple other cases, which did not involve the “TypeError: Cannot read property ‘jqXHR’ of undefined” error message on the client side. But I saved the JS file where the error happened, if somebody wants to look at it.)

Message (5 copies reported)
Uncaught Error: Not Found
Url: https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js
Line: 14
Column: 25883
Window Location: https://edgeryders.eu/t/discourse-user-manual-for-edgeryders-eu/6463/1
Backtrace
Error: Not Found
    at s (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:14:26084)
    at o (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:14:25941)
    at i (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:14:25836)
    at Object.trigger (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:17:26248)
    at https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:17:28250
    at e.invoke (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:3979)
    at e.flush (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:2902)
    at e.flush (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:4992)
    at e._end (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:9818)
    at e.end (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:6320)
    at e._run (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:10333)
    at e.run (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:9:6965)
    at a (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:4:29639)
    at Object.r.error (https://edgeryders.eu/assets/application-b7e1701c68247f1198a83883a70ad5264302ef5fd43e37b09ce6d0125baa133a.js:7:26015)
    at u (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:2:6854)
    at Object.fireWith [as rejectWith] (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:2:7603)
    at n (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:3:10363)
    at XMLHttpRequest.<anonymous> (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06ed7d3.js:3:15221)

Env
    hostname	server.edgeryders.eu
    process_id	27682
    application_version	2.2.1
    HTTP_HOST	edgeryders.eu
    REQUEST_URI	/logs/report_js_error
    REQUEST_METHOD	POST
    HTTP_USER_AGENT	Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/73.0.3683.75 Chrome/73.0.3683.75 Safari/537.36
    HTTP_ACCEPT	*/*
    HTTP_REFERER	https://edgeryders.eu/t/discourse-user-manual-for-edgeryders-eu/6463/1
    params
        message	Uncaught Error: Not Found Url: https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb3736
        url	https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58a4a8a83bcee2d99174547b01c06
        line	14
        column	25883
        window_location	https://edgeryders.eu/t/discourse-user-manual-for-edgeryders-eu/6463/1
        stacktrace	Error: Not Found at s (https://edgeryders.eu/assets/ember_jquery-cf9339810550f9c92505dfbb37362c58

Sorry @tanius Akismet thought your post was spam for some reason and deleted it, I just went ahead and undeleted it.

@techAPJ can you re-test given this info?

Ce problème persiste-t-il ?

“Impossible de lire le champ jqXHR” provient de notre code de gestion personnalisée des erreurs autour des appels AJAX échoués.

Non, cela ne persiste pas… je n’ai pas rencontré cette erreur au cours de la dernière année. Mais c’était déjà un cas très marginal, et pas clairement reproductible, donc je ne considérerais pas cela comme une preuve de son absence à présent…

Au fait, il y a un autre aspect de l’échec de l’enregistrement d’un message qui pourrait être amélioré. À savoir, lorsqu’un enregistrement de message ou de modification de message échoue en raison d’une erreur réseau, il faut un temps interminable avant que le système ne l’indique. Il manque un moyen de renvoyer cette requête. Le bouton « Annuler » ne sert à rien ici, car il entraînerait la perte du contenu du message ou de la modification du message.

Nous avons besoin d’une reproduction pour faire quoi que ce soit. Avez-vous joué avec l’onglet Réseau dans Chrome pour basculer vers un réseau artificiellement peu fiable ? Cela pourrait fonctionner pour une reproduction ?

Cette erreur est apparue chez moi lorsque j’ai effectué les étapes suivantes.
Tout a été fait dans un plugin.

J’ajoutais un validateur à la classe Post… le contenu n’a pas d’importance, mais je le fournis pour les besoins de la réponse.

frozen_string_literal: true

class MainPostValidator < ActiveModel::Validator
def validate(record)
puts ‘TTTTT’
p record

raw = record.raw

unless raw.present?
  post.errors.add :base, 'This record is invalid'
end

end

private
def some_complex_logic
# …
end
end

Avant de lancer le serveur avec les nouvelles modifications, j’avais le site ouvert sur la page d’édition d’un article, prêt à vérifier si l’enregistrement des modifications déclenchait mon validateur.

J’ai redémarré le serveur, mais je n’ai pas actualisé la page ! Lorsque j’ai cliqué sur « Enregistrer les modifications » sur l’article, j’ai vu cette erreur. Elle a disparu dès que j’ai actualisé la page, et peut-être aussi après avoir redémarré l’instance du serveur.

Tout cela a été fait en local en mode développement.

J’espère que cela vous aidera :slight_smile:

Le validateur a été déclaré dans un nouveau fichier, et le code supplémentaire de Post pour appliquer le validateur se trouvait également dans un nouveau fichier.

require_dependency 'post' Post.class_eval { include ActiveModel::Validations validates_with MainPostValidator }