我在solaris系统中启动tomcat后一段时间自动停止

2010-10-28 14:19:50 org.apache.coyote.http11.Http11BaseProtocol init
信息: Initializing Coyote HTTP/1.1 on http-80
2010-10-28 14:19:50 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 2321 ms
2010-10-28 14:19:51 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2010-10-28 14:19:51 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/5.5.31
2010-10-28 14:19:51 org.apache.catalina.core.StandardHost start
信息: XML validation disabled
2010-10-28 14:20:18 org.apache.coyote.http11.Http11BaseProtocol start
信息: Starting Coyote HTTP/1.1 on http-80
2010-10-28 14:20:18 org.apache.jk.common.ChannelSocket init
信息: JK: ajp13 listening on /0.0.0.0:8010
2010-10-28 14:20:18 org.apache.jk.server.JkMain start
信息: Jk running ID=0 time=0/69 config=null
2010-10-28 14:20:18 org.apache.catalina.storeconfig.StoreLoader load
信息: Find registry server-registry.xml at classpath resource
2010-10-28 14:20:18 org.apache.catalina.startup.Catalina start
信息: Server startup in 28067 ms
2010-10-28 14:37:13 org.apache.coyote.http11.Http11BaseProtocol pause
信息: Pausing Coyote HTTP/1.1 on http-80
2010-10-28 14:37:14 org.apache.catalina.core.StandardService stop
信息: Stopping service Catalina
2010-10-28 14:37:17 org.apache.coyote.http11.Http11BaseProtocol destroy
信息: Stopping Coyote HTTP/1.1 on http-80

为什么会自动停止，我没有停止他啊！

顶一下，高手请进啊