Qlik Sense Client Managed: Adjust the MaxHttpHeaderSize for the Micro Services run by the ServiceDispatcher

[Sebastian_Linser]

When using SAML or ticket authentication in Qlik Sense, some users belonging to a big number of groups see the error 431 Request header fields too large on the hub and cannot proceed further.

Resolution

The information in this article is provided as-is and to be used at own discretion. Depending on tool(s) used, customization(s), and/or other factors ongoing support on the solution below may not be provided by Qlik Support.

The default setting will still be a header size of 8192 bytes. The fix adds support for a configurable MaxHttpHeaderSize.

Steps:

1. To configure add it at the top section of the file under [globals] (C:\Program Files\Qlik\Sense\ServiceDispatcher\service.conf)

   [globals]
   LogPath="${ALLUSERSPROFILE}\Qlik\Sense\Log"
   MigrationPort=4545
   (...)
   MaxHttpHeaderSize=65534

2. Once the change is done, save the file and restart the Qlik Service Dispatcher service.

Note: Above value (16384) is an example. You may potentially need to put more depending on the total number of characters of all the AD groups to which the user belongs. The max value is 65534.

Environment:

Qlik Sense Enterprise on Windows 
February 2021 and above