Hi, On Thu, May 23, 2013 at 6:25 PM, Hanno Wiegard <[email protected]> wrote: > Hi, > > we just migrated from Jetty 7 to Jetty 9.0.3. Now we quite frequently > encounter "Too many open files" exceptions (on linux, Ubuntu 12.04, Oracle > Java 1.7.0_21 32bit). After looking at the file handle list we see hundreds > of sockets for the process as shown here > > java 29113 hwiegard 870u unix 0x00000000 0t0 3521865 socket > java 29113 hwiegard 871u unix 0x00000000 0t0 3521865 socket > java 29113 hwiegard 872u unix 0x00000000 0t0 3521865 socket > > At the same time we only see one listener > > java 29113 hwiegard 155u IPv4 3521904 0t0 TCP *:8099 (LISTEN) > > and there is no traffic on the server. As soon as we start sending requests > to the server the number of sockets goes down to 2 (or maybe 3) and stays in > a reasonable range (approx. number of concurrent requests). But after > stopping all requests the number of sockets goes up stepwise (1-10 per > second) till a few hundred are reached. The number seems to be not directly > related to the number of requests. The number of sockets stays at the same > level, even after waiting for 5-10 minutes and netstat showing no TIME_WAIT, > FIN_WAIT1 or FIN_WAIT2 connections anymore. > > In the servlet uses the startAsync method, processes the request in a > separate thread, sends the result and calls complete on the AsyncContext. The > servlet is also marked "async-supported" in the web.xml file. As soon as we > remove the startAsync/separate thread/complete code the number of sockets > does not grow after stopping the requests. And everything seems to be normal > as well if we use startAsync in conjunction with Tomcat 7.0.40 or Jetty 7.6.8. > > Any idea what could be wrong here or how to track down the problem?
Please file an issue at https://bugs.eclipse.org/bugs/enter_bug.cgi?product=Jetty, so we won't lose track of this problem. What you describe is a very strange scenario. Do you have any chance of writing a small test case that reproduces the problem ? Thanks ! -- Simone Bordet ---- http://cometd.org http://webtide.com http://intalio.com Developer advice, training, services and support from the Jetty & CometD experts. Intalio, the modern way to build business applications. _______________________________________________ jetty-users mailing list [email protected] https://dev.eclipse.org/mailman/listinfo/jetty-users
