求助！急死了！！

vhtk

2005-11-9 20:32:08 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: attributeReplaced('org.apache.catalina.WELCOME_FILES', '[Ljava.lang.String;@173ec72')
2005-11-9 20:32:08 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextDestroyed()
2005-11-9 20:32:08 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextDestroyed()
2005-11-9 20:32:08 org.apache.catalina.connector.MapperListener destroy
警告: Error unregistering MBeanServerDelegate
java.lang.NullPointerException
     at org.apache.catalina.connector.MapperListener.destroy(MapperListener.java:161)
     at org.apache.catalina.connector.Connector.stop(Connector.java:1044)
     at org.apache.catalina.core.StandardService.stop(StandardService.java:521)
     at org.apache.catalina.core.StandardServer.stop(StandardServer.java:717)
     at org.apache.catalina.startup.Catalina.stop(Catalina.java:586)
     at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:629)
2005-11-9 20:32:08 org.apache.coyote.http11.Http11Protocol destroy
信息: Stopping Coyote HTTP/1.1 on http-80
2005-11-9 20:32:08 org.apache.catalina.connector.Connector stop
严重: Coyote connector has not been started

帮我分析一下问题所在好吗？我的是linux服务器，现在tomcat每天都死掉，这是日志文件。

另外请问有jsp程序错误检测软件吗？推荐一个好吗？有人说jprodesuit，但是我找不到呀。谢谢了！！！