When I start my Aggregation Server, I get the following:
DEBUG: AggServer: CatalogServlet copy /usr/local/jakarta-tomcat/webapps/thredds/initialContent/dodsC/ to /usr/local/jakarta-tomcat-4.1.27-LE-jdk14/content/thredds/dodsC/ (04-04-19 10:57:08 ) DEBUG: AggServer: catalog config </usr/local/jakarta-tomcat-4.1.27-LE-jdk14/content/thredds/dodsC/catalogConfig.xml> is not valid (04-04-19 10:57:09 )
From: Tony Jolibois <tjolibois at cls.fr>
The error didn't come from the catalog itself, but from the network configuration of my computer. In the configuration catalog of the AS server, there are some http URLs:
<!DOCTYPE catalog SYSTEM "http://www.unidata.ucar.edu/projects/THREDDS/xml/AggServerCatalog.dtd">
<catalog name="MERCATOR DODS Aggregation Server Catalog" version="0.6"
xmlns="http://www.unidata.ucar.edu/thredds"
xmlns:xlink="http://www.w3.org/1999/xlink">
My environment was this: I have a firewall, and my computer was not open to Internet, so it could not connect to the two sites http://www.unidata.ucar.edu and http://www.w3.org. I tested the local copy of AggServerCatalog.dtd and InvCatalog.0.6.dtd but it didn't work.
After opening the connection to these two URLs at the firewall, all works fine now.
Conclusion: if your computer cannot connect to these sites, you won't be able to run an Aggregating server.
Thanks Tony for tracking this down and providing this FAQ!