Troubleshooting - Uploading image asset on dotCms

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Hi dotCMS community,

I recently deployed a dotCMS instance in a production-like environment with strict security restrictions. I’ve encountered an issue: whenever I try to add a new image, this part gets stuck in a loading state. This doesn’t happen in my other environments where the security is not configured.

image
image1728×840 27.9 KB

I’ve checked the console and the response codes, but there are no errors—everything appears to be returning 200. I’m not sure where to start troubleshooting, but I suspect some requests might be silently rejected under the hood due to the security restrictions.

There is a wss://my-dotcms.fr/api/ws/v1/system/events in 101 which disconnect and reconnect. In my logs, I found this error:
09:18:13.630 ERROR websocket.SystemEventsWebSocketEndPoint - java.io.EOFException

I’ve tried adjusting the security settings, but I don’t have access to the configuration (another team handle this aspect) to investigate further. Has anyone experienced something similar or have any suggestions to what should I look for ?

Thanks in advance for your help!

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EOFException would indicate a partially corrupt file (End of File). It might be the file, not the system. If I recall, there was a class of JPEGs the system hates- ones specifically for print productions that use a different color standard.
Also, did you check on the folder assigned that it has the correct file extensions as ‘allowed’? It is pretty particular and jpg and jpeg are different.