Ok, then my last question. How do you terminate a thread "gracefully"? In standard Java, there is no way to do that (or at least there is not any I'm aware of).
In GAE you trigger the "DeadlineExceededException", which reminds me a bit of the standard "ThreadDeath" exception (triggered by the Thread.stop() method). However there is a difference: the ThreadDeath exception can be caught and ignored by the thread, while if the DeadlineExceededException is caught then the thread has only one second before being definitely stopped (no matter what). How do you do that? I.e. what happens when that extra-second is over? Are you using a custom-JVM to handle that? Also, using Thread.stop() is deprecated as some objects could be left in an non-consistent state if they need to synchronize access to its methods (monitors of synchronized methods hold by the stopped thread are just released). Does the DeadlineExceededException have the same implications? I.e. are monitors just released without further consideration? Best, Luis On Jul 2, 7:31 pm, "Ikai L (Google)" <ika...@google.com> wrote: > No, the situation is handled gracefully. > > > > On Thu, Jul 1, 2010 at 12:29 PM, Luis <luis....@gmail.com> wrote: > > Thanks again! > > > But then I have a related question: when you terminate some request > > that has last too long, you just kill the whole JVM? Cannot that > > affect other petitions attended by other servlets (running in > > different threads) of the same application running in that JVM? > > > Best, > > Luis > > > On Jul 1, 8:02 pm, "Ikai L (Google)" <ika...@google.com> wrote: > > > No, applications run inside their own JVM. > > > > On Thu, Jul 1, 2010 at 7:23 AM, Luis <luis....@gmail.com> wrote: > > > > Hi, > > > > > I'm making a survey about security in PaaS platforms, and I have a > > > > question about GAE that maybe you can help me with. It is well known > > > > that GAE uses Jetty as the servlet container. However, I have not been > > > > able to find any information about whether each Jetty instance hosts > > > > servlets of one single user or the same Jetty instance can host > > > > servlets of different users at the same time. > > > > > I wonder about that because I think it is an important question in > > > > these environments: Java has certain limitations regarding isolation > > > > (possible reference leaks). If the same Jetty instance runs servlets > > > > of different users, then a malicious tenant could try to exploit those > > > > limitations to access to servlets from other users. If, on the other > > > > hand, each Jetty instance runs servlets only from an unique user, then > > > > that problem cannot affect GAE. > > > > > Thank you very much for help!, regards, > > > > Luis > > > > > -- > > > > You received this message because you are subscribed to the Google > > Groups > > > > "Google App Engine" group. > > > > To post to this group, send email to google-appengine@googlegroups.com > > . > > > > To unsubscribe from this group, send email to > > > > google-appengine+unsubscr...@googlegroups.com<google-appengine%2bunsubscr...@googlegroups.com> > > <google-appengine%2bunsubscr...@googlegroups.com<google-appengine%252bunsubscr...@googlegroups.com> > > > > > . > > > > For more options, visit this group at > > > >http://groups.google.com/group/google-appengine?hl=en. > > > > -- > > > Ikai Lan > > > Developer Programs Engineer, Google App Engine > > > Blog:http://googleappengine.blogspot.com > > > Twitter:http://twitter.com/app_engine > > > Reddit:http://www.reddit.com/r/appengine > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google App Engine" group. > > To post to this group, send email to google-appeng...@googlegroups.com. > > To unsubscribe from this group, send email to > > google-appengine+unsubscr...@googlegroups.com<google-appengine%2bunsubscr...@googlegroups.com> > > . > > For more options, visit this group at > >http://groups.google.com/group/google-appengine?hl=en. > > -- > Ikai Lan > Developer Programs Engineer, Google App Engine > Blog:http://googleappengine.blogspot.com > Twitter:http://twitter.com/app_engine > Reddit:http://www.reddit.com/r/appengine -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
