502 Proxy Error
Accessing development POMS application on fermicloud045, occasionally I see this error message:
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /poms/campaign_sheet.
Reason: Error reading from remote server
Apache/2.2.15 (Scientific Linux) Server at fermicloud045.fnal.gov Port 443
For this specific case I tried to access the spreadsheet of the NOvA Probe Jobs campaign, the link is:
Please, can you have a look at this?
#2 Updated by Marc Mengel about 3 years ago
So we have two items in place in development to address this:
- caching/sharing on expensive requests with the dogpile.cache package
- turning up the listen queue to 256 (which also requires a kernel tune up)
This seems to reduce this significantly in development; possilby correcting it entirely.
I have a ticket in for the kernel tuning in production. RITM0563826