Symptom

A Content Portal upload fails, producing an error similar to this:

Cause

The Gateway's spool directory has reached its maximum capacity. The spool directory is the temporary space to support HTTP multipart MIME uploads, which are the requests that are made by uploading files into the Content UI Overview.

Solution

Move the spool directory to one that has enough free space to support your largest simultaneous uploads.

InGateway Configuration, locate the [gateway] section and edit the value for multipartSpoolDir, which defaults to var/spool/cloudgateway/.