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February 5, 2025
Solved

LucidChart Confluence onPrem Plugin: 400 Bad Request - Request header too large

  • February 5, 2025
  • 3 replies
  • 187 views

Hello Folks, 

 

We are running Confluence DataCenter 8.5 with the Lucidchart plugin for Atlassian Confluence (v1.29.4) and are intermittently experiencing 400 Bad Request - Request header too large errors when attempting to load diagrams.  It is very intermittent.  I am logged into lucid in the same Chrome profile and validated the firewall test passes successfully. 

 

Best answer by Kelsey Gaag

Hi ​@arun sampath

Thank you for the reply! It looks like this issue is caused by the “Rich Lucidchart viewer" setting for the plugin. Could you try turning the rich viewer off to see if that resolves the issue? 

Comments

Shantel Gillette
Lucid product team
February 6, 2025

Thank you for sharing this with us ​@smalleynorman_block,

I am going to have this post converted into a support ticket for some further investigation to understand what is happening. 

Shantel Gillette
February 26, 2025

Any update on this error. I’m also facing same issue

Kelsey Gaag
Lucidite
February 27, 2025

Hi ​@arun sampath

Thank you for the reply! It looks like this issue is caused by the “Rich Lucidchart viewer" setting for the plugin. Could you try turning the rich viewer off to see if that resolves the issue?