Sharing good news; thanks to Roland's emails suggesting we check out the settings on Apache Tomcat, Rosanna found this article:
GOOGLE on TimeOuts for Tomcat and Apache.
Updated our Apache server in operations, added in/usr/www/opendap/conf/httpd.conf
..Timeout 5400ProxyTimeout 5400..
There's a mention somewhere that the time is default 300. 5400 is about 90 minutes. We've currently set it to 10800 (3 hrs) due to having some very large data sets.
This has solved our 300 second time out issue, and we are now seeing completion on requests that previously would fail out and give us errors.
Physical Oceanography DAAC