求助：应用放在虚拟机上的服务老是当掉

一下是日志中的错误信息。这几天不知道为什么放在虚拟机上的服务老是当掉，虚拟机远程也登不，只能靠硬件的同事把服务重启后才能进，周六的时候出现了一次这个错误，今天上午又出现了一次，求大侠赐教！
[11-8-1 10:32:40:847 CST] 000003f5 SRTServletReq E   SRVE0133E: 解析参数时发生错误。java.net.SocketTimeoutException: Async operation timed out
at com.ibm.ws.tcp.channel.impl.AioTCPReadRequestContextImpl.processSyncReadRequest(AioTCPReadRequestContextImpl.java:157)
at com.ibm.ws.tcp.channel.impl.TCPReadRequestContextImpl.read(TCPReadRequestContextImpl.java:109)
at com.ibm.ws.http.channel.impl.HttpServiceContextImpl.fillABuffer(HttpServiceContextImpl.java:4126)
at com.ibm.ws.http.channel.impl.HttpServiceContextImpl.readSingleBlock(HttpServiceContextImpl.java:3366)
at com.ibm.ws.http.channel.impl.HttpServiceContextImpl.readBodyBuffer(HttpServiceContextImpl.java:3485)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundServiceContextImpl.getRequestBodyBuffer(HttpInboundServiceContextImpl.java:1680)
at com.ibm.ws.webcontainer.channel.WCCByteBufferInputStream.bufferIsGood(WCCByteBufferInputStream.java:105)
at com.ibm.ws.webcontainer.channel.WCCByteBufferInputStream.read(WCCByteBufferInputStream.java:78)
at com.ibm.ws.webcontainer.srt.http.HttpInputStream.read(HttpInputStream.java:286)
at com.ibm.ws.webcontainer.servlet.RequestUtils.parsePostData(RequestUtils.java:297)
at com.ibm.ws.webcontainer.srt.SRTServletRequest.parseParameters(SRTServletRequest.java:1336)
at com.ibm.ws.webcontainer.srt.SRTServletRequest.getParameter(SRTServletRequest.java:994)
at com.harbortek.framework.action.RequestProcessor.getDispatchMethod(RequestProcessor.java:176)
at com.harbortek.framework.action.RequestProcessor.doProcess(RequestProcessor.java:69)
at com.harbortek.framework.action.RequestProcessor.process(RequestProcessor.java:37)
at com.harbortek.framework.action.ActionServlet.process(ActionServlet.java:31)
at com.harbortek.framework.action.ActionServlet.doPost(ActionServlet.java:26)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:966)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:907)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145)
at com.harbortek.framework.filters.SecurityFilter.doFilter(SecurityFilter.java:40)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:696)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:641)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:475)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:463)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:92)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:744)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1425)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:92)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:394)
at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:152)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:213)
at com.ibm.io.async.AbstractAsyncFuture.fireCompletionActions(AbstractAsyncFuture.java:195)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:193)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:725)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:847)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1498)
Caused by: com.ibm.io.async.AsyncTimeoutException(Async operation timed out, [Timeout, rc=0])
at com.ibm.io.async.AbstractAsyncFuture.waitForCompletion(AbstractAsyncFuture.java:353)
at com.ibm.io.async.AsyncFuture.getByteCount(AsyncFuture.java:216)
at com.ibm.ws.tcp.channel.impl.AioSocketIOChannel.readAIOSync(AioSocketIOChannel.java:214)
at com.ibm.ws.tcp.channel.impl.AioTCPReadRequestContextImpl.processSyncReadRequest(AioTCPReadRequestContextImpl.java:150)
... 48 more