IMHO, try jakarta.apache.org JMeter. Take a close look at the very rigorous load/stress testing so-called Test Plan that is a distributed load test. HTH.
Tobias Schulz-Hess wrote .. > Hi there, > > we use the current Tomcat 6.0 on 2 machines. The hardware is brand new and is > really > fast. We get lots of traffic which is usually handled well by the tomcats and > the > load on those machines is between 1 and 6 (when we have lots of traffic). > The machines have debian 4.1/64 as OS. > > However, sometimes (especially if we have lots of traffic) we get the > following > exception: > INFO | jvm 1 | 2008/01/23 15:28:18 | java.net.SocketException: Too many > open > files > INFO | jvm 1 | 2008/01/23 15:28:18 | at > java.net.PlainSocketImpl.socketAccept(Native > Method) > INFO | jvm 1 | 2008/01/23 15:28:18 | at > java.net.PlainSocketImpl.accept(PlainSocketImpl.java:384) > INFO | jvm 1 | 2008/01/23 15:28:18 | at > java.net.ServerSocket.implAccept(ServerSocket.java:453) > INFO | jvm 1 | 2008/01/23 15:28:18 | at > java.net.ServerSocket.accept(ServerSocket.java:421) > INFO | jvm 1 | 2008/01/23 15:28:18 | at > org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServe > rSocketFactory.java:61) > INFO | jvm 1 | 2008/01/23 15:28:18 | at > org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:310) > INFO | jvm 1 | 2008/01/23 15:28:18 | at > java.lang.Thread.run(Thread.java:619) > I > > We already have altered the ulimit from 1024 (default) to 4096 (and therefore > proofing: > yes, I have used google and read almost everything about that exception). > > We also looked into the open files and all 95% of them are from or to the > Tomcat > Port 8080. (The other 5% are open JARs, connections to memcached and MySQL and > SSL-Socket). > > Most of the connections to port 8080 are in the CLOSE_WAIT state. > > I have the strong feeling that something (tomcat, JVM, whatsoever) relies that > the JVM garbage collection will kill those open connections. However, if we > have > heavy load, the garbage collection is suspended and then the connections pile > up. > But this is just a guess. > > How can this problem be solved? > > Thank you and kind regards, > > Tobias. > > ----------------------------------------------------------- > Tobias Schulz-Hess > > ICS - Internet Consumer Services GmbH > Mittelweg 162 > 20148 Hamburg > > Tel: +49 (0) 40 238 49 141 > Fax: +49 (0) 40 415 457 14 > E-Mail: [EMAIL PROTECTED] > Web: www.internetconsumerservices.com > > Projekte > www.dealjaeger.de > www.verwandt.de > > ICS Internet Consumer Services GmbH > Geschäftsführer: Dipl.-Kfm. Daniel Grözinger, Dipl.-Kfm. Sven Schmidt > Handelsregister: Amtsgericht Hamburg HRB 95149
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