gwt提示错误: 严重: Exception while dispatching incoming RPC call

严重: Exception while dispatching incoming RPC call
java.net.SocketTimeoutException: Read timed out
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.read(SocketInputStream.java:129)
        at org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:751)
        at org.apache.coyote.http11.InternalInputBuffer$InputStreamInputBuffer.doRead(InternalInputBuffer.java:781)
        at org.apache.coyote.http11.filters.IdentityInputFilter.doRead(IdentityInputFilter.java:116)
        at org.apache.coyote.http11.InternalInputBuffer.doRead(InternalInputBuffer.java:710)
        at org.apache.coyote.Request.doRead(Request.java:428)
        at org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:304)
        at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:403)
        at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:327)
        at org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:162)
        at com.google.gwt.user.server.rpc.RPCServletUtils.readContent(RPCServletUtils.java:175)
        at com.google.gwt.user.server.rpc.RPCServletUtils.readContentAsGwtRpc(RPCServletUtils.java:205)
        at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.readContent(AbstractRemoteServiceServlet.java:182)
        at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:234)
        at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:662)




用的是GWT 2.1开发的，工程部署tomcat中日志打出来的，在浏览器访问会弹出 500 The call failed on the server;see server log for details

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