The JBoss Clustering document (2002-09-27) states:
By default, Tomcat HTTP session replication uses a method called instant snapshotting : sessions are replicated after each HTTP request.
What does "after each request" mean? Does the replication wait till after the service method of the servlet has completed, i.e. the response has been generated and sent (modulo buffering)? Or does it happen somehow asynchronously with respect to the servlet's service method?