JIRA Issue #1406: https://issues.apache.org/jira/browse/XERCESJ-1406. Eliminate redundant and unnecessary calls to findSchemaGrammar(). If namespace growth has been enabled only attempt to load more components if the triggering component was not already loaded.
Fixing JIRA Issue #1375: https://issues.apache.org/jira/browse/XERCESJ-1375. Fixing an NPE when a namespace is undeclared. Same issue that was addressed in SVN rev 694593. Patch thanks to Arthur De Magalhaes.