Single Sign On Web Agent is protecting resources on an Apache reverse proxy. Small file uploads to the back end application are working as expected, but users get a 502 error for large file uploads (>40MB). The Web Agent logs show no errors.
The default proxy timeout in Apache was insufficient.
Apache 2.4 servers acting as reverse proxy
Increase the timeout value in the proxypass directive in Apache's ssl.conf file (the 'timeout' parameter may need to be added if it is not already present). Sample proxypass line with 10 minute timeout:
ProxyPass / ajp://localhost:8009/ timeout=600
As this solution is entirely outside of the CA software, please consult your Apache vendor for additional documentation around the proxypass settings.