http://code.google.com/appengine/articles/managing-resources.html
For Java HTTP sessions, write asynchronously - HTTP sessions (Java) lets you configure your application to asynchronously write http session data to the datastore by adding <async-session-persistence enabled="true"/> to your appengine-web.xml. but parameter 'queue-name' is required! :-) On Sep 3, 8:53 pm, John <supp...@weespr.com> wrote: > http://code.google.com/p/googleappengine/issues/detail?id=5774 > > Star it > > On Aug 30, 7:28 pm, Spines <kwste...@gmail.com> wrote: > > > > > > > > > I'm getting this same error after enablingasync-session-persistence, > > except 100% of the time. It shows this error in the logs: > > > javax.servlet.ServletContext log: _ah_queue_deferred: Deferred task > > failed exception: > > com.google.apphosting.utils.servlet.DeferredTaskServlet > > $DeferredTaskException: java.lang.ClassNotFoundException: > > com.google.apphosting.runtime.jetty.DeferredDatastoreSessionStore > > $DeferredSave > > > Any ideas? > > > On Aug 1, 7:34 am, gk <goran.kar...@googlemail.com> wrote: > > > > Greetings, > > > > still have not found any clues what could cause "async-session-> > > > > persistence" tasks to fail with HTTP status code 415 (Unsupported > > > Media Type). > > > > Any ideas? > > > > On Jul 27, 9:16 pm, gk <goran.kar...@googlemail.com> wrote: > > > > > I am experimenting with <async-session-persistenceenabled="true" > > > > queue-name="default"/> to store https session data; at first it seems > > > > to work fine with the "default" default queue settings; multithreading > > > > is switched on for the application. > > > > > It appears that there is some kind of collision, as the tasks seem to > > > > succeed when the rate of incoming requests is low. > > > > > When I open a browser window and reload 50 pages from the site at once > > > > it seems to work fine and the queue is filled up with some tasks. Most > > > > ot the tasks succeed. > > > > > The problem is that around 30% of the "async-session-persistence" > > > > tasks fail repeatedly with HTTP status code 415 (Unsupported Media > > > > Type) and there is no further indication of the cause in the queue or > > > > in the server log. -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
