upgraded the da to 3.5 june.
Tried to upgrade the dc's using the console, but it never actually upgraded, just hung.
Had to manually upgrade from the command line.

You are using a non-root user with sudo
 

CAPM 3.5 and 3.6
Data Collector

In 3.5 and 3.6, we still require you to 1-time do manual upgrade, but future ones can be done via sudo where install owner has NOPASSWD and install.bin in your sudoers file.

https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/it-operations-management/performance-management/3-7/upgrading/upgrade-the-data-collectors.html