Transformation from xml to html in Metacat read action sometimes take long time
Today we found it would take 20 seconds to read a document from KNB when qformat=knb. However, it only took 1 second to read the same document when qformat=xml. This indicates the xml transformation took a long time. We don't know the reason yet. The short term solution is to restart tomcat. However, we should use test server to duplicate the bug and figure out the reason.