We have JBoss-tomcat installed on solaris 2.8 with 512 RAM Here's our system info OS/Hardware bash-2.03$ uname -a SunOS vanguard 5.8 Generic_108528-02 sun4u sparc SUNW,UltraSPARC-IIi-cEngine Java Version bash-2.03# java -version java version "1.3.0_02" Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0_02) Java HotSpot(TM) Client VM (build 1.3.0_02, mixed mode We are running the hello session bean example. When we load the machine with AB (Apache Bench), 128 concurrent users, 10,000 requests we get some strange results. The output from the HelloEJB either doesn't include the "StatelessSessionBean says: Hello World" message, includes the message multiple times. When there is no load, there is no problem. Everything works great then. We also get this output when this happens. Output from console: [Mail Service] DEBUG: not loading optional address map file: /META-INF/javamail.address.map [Mail Service] Mail Service 'Mail' bound to java:/Mail [Mail Service] Started [Service Control] Started 25 services [Default] JBoss 2.1-BETA-Mar-26-2001 Started in 0m:18s [NonOptimized] TxCapsule: Lock contention, tx=XidImpl [FormatId=257, GlobalId=mackey//41546, BranchQual=] _______________________________________________ Jboss-development mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-development