Sometimes a *Status Code: 429 Too Many Requests* is seen in the Network tab after uploading an EPUB file

Observed behavior

Sometimes a Status Code: 429 Too Many Requests is seen in the Network tab after uploading a file. Experienced with a fresh new channel.

Expected behavior

No Status Code: 429 Too Many Requests is seen in the Network tab after uploading a file.

Errors and logs

equest URL: https://sentry.io/api/1252819/store/?sentry_key=e4b21baeb7a044b885464d2af687fb73&sentry_version=7
Request Method: POST
Status Code: 429 Too Many Requests
Remote Address: 35.188.42.15:443
Referrer Policy: origin
Access-Control-Allow-Origin: *
Connection: keep-alive
Content-Length: 3
Content-Type: text/plain
Date: Mon, 08 Mar 2021 11:22:51 GMT
ETag: "600ece65-3"
Server: nginx
Accept: */*
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9,bg;q=0.8
Connection: keep-alive
Content-Length: 6553
Content-Type: text/plain;charset=UTF-8
Host: sentry.io
Origin: https://hotfixes.studio.learningequality.org
Referer: https://hotfixes.studio.learningequality.org/
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: cross-site
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.36
sentry_key: e4b21baeb7a044b885464d2af687fb73
sentry_version: 7
{exception: {values: [,…]}, platform: "javascript",…}
breadcrumbs: [{timestamp: 1615202261.382, category: "xhr",…}, {timestamp: 1615202261.995, category: "ui.click",…},…]
event_id: "b5687e4ce2594f80b143d2287c268eeb"
exception: {values: [,…]}
platform: "javascript"
request: {,…}
sdk: {name: "sentry.javascript.browser", packages: [{name: "npm:@sentry/browser", version: "5.10.2"}],…}
user: {id: 8549, email: "mmilev3@melontech.com"}

instrument.ts:113 [Vuetify] 'black' is not a valid rgb color
/en/channels/fdeb95a…a37cbf122404cc/#/:1 Autofocus processing was blocked because a document's URL has a fragment '#/'.
instrument.ts:113 [Vuetify] 'default slot' is deprecated, use ':items and scoped slot "item"' instead

found in

---> <VBreadcrumbs>
       <Breadcrumbs>
         <VToolbar>
           <CurrentTopicView>
             <VContent>
               <TreeViewBase>
                 <TreeView>
                   <VApp>
                     <Root>
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)
instrument.ts:141 POST https://sentry.io/api/1252819/store/?sentry_key=e4b21ba…&sentry_version=7 429 (Too Many Requests)

Additional information

Steps to reproduce the issue

1. Login to Studio
2. Click the New Channel button
3. Fill in title and language
4. Click Create
5. Click Add
6. Click Upload files
7. Select EPUB and upload it
8. Fill the mandatory fields
9. Click Finish
10. See the console

The issue is not reproduced consistently and this scenario may need several repetitions in order to experience it.

Usage Details

• OS: Windows 10
• Browser: Chrome
• URL: https://hotfixes.studio.learningequality.org/

Start by repeating the listed Studio workflow in Chrome with a new channel and EPUB upload, then inspect the browser Network and console output for requests to Sentry. Compare successful and failing repetitions to determine whether the 429 is tied to upload completion or error reporting. Done means the scenario no longer produces the reported 429, or its cause and a reproducible fix are established.