The default attribute has a default value of no. If set to yes, the Arbortext PE サブプロセス can service any HTTP request. If any TestSet elements are defined for this Arbortext PE サブプロセス pool, they are ignored.

As described in Arbortext PE サブプロセス Allocation, when a request handler calls E3RequestContext.allocateE3Subprocess, it passes the current HTTP request. The Arbortext Publishing Engine Request Context passes the HTTP request to each Arbortext PE サブプロセス pool defined in e3config.xml, asking whether it can fulfill the request. The Arbortext PE サブプロセス pool with default set to yes always responds that it can service the request.

Be sure to give only one Arbortext PE サブプロセス pool the yes value for the default attribute. The pools are queried in the order they're configured in e3config.xml, so make sure it's the last pool configured in the SubprocessPools section of e3config.xml. Because the default pool handles all HTTP requests, any pool configured after it will never be asked to handle a request.