tomcat报错，jsf+ibat开发的

2007-3-1 15:08:19 org.apache.jk.common.ChannelSocket init
信息: JK2: ajp13 listening on /0.0.0.0:8009
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
Caused by: java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start(Native Method)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.<init>(Thre
adPool.java:642)
        at org.apache.tomcat.util.threads.ThreadPool.openThreads(ThreadPool.java
:515)
        at org.apache.tomcat.util.threads.ThreadPool.start(ThreadPool.java:148)
        at org.apache.jk.common.ChannelSocket.init(ChannelSocket.java:406)
        at org.apache.jk.server.JkMain.start(JkMain.java:339)
        at org.apache.jk.server.JkCoyoteHandler.start(JkCoyoteHandler.java:193)
        at org.apache.coyote.tomcat5.CoyoteConnector.start(CoyoteConnector.java:
1527)
        at org.apache.catalina.core.StandardService.start(StandardService.java:4
89)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:231
3)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
        ... 6 more