id summary reporter owner description type status priority milestone component version severity resolution keywords cc external_id 211 Serializing class definition to XML needs to be optimized ronnielouie "From Haris Kurtagic: The problem was when executing MgServerDescribeSchema::DescribeSchema. While transfering classes from FDO schema collection to MapGuide it is calling MgServerGetFeatures::GetMgClassDefinition in a for-loop for every class. GetMgClassDefinition will seralize class to XML. But serialazing is done in a way that new temporary schema is created and than class is removed from original schema , put to temporary, temporary schema serialized and class returned to original class collection. And if in that proccess another thread is doing describe schema it is error and exception and... This is more obvious in a case of edits because after every edit ( insert/update/delete ) cache is cleared and DescribeSchema is called again. I believe that describe schema should work differently, when doing ""get class"" it shouldn't change original schema list ( temporary removes class from list). " defect closed medium 2.1 Feature Service 1.2.0 major fixed 945237