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Java.net.SocketException: 服务器意外断开连接

javaservletsio
4

我正在使用一个servlet将一个字符串参数传递到另一个远程系统中的servlet，以从该远程servlet获取xml响应。

当我尝试从我的本地PC连接到该远程Servlet时，这个方法可以正常工作。

但是，当我从另一台服务器执行相同操作时，我遇到了错误java.net.SocketException: Unexpected end of file from server。

错误信息：

2011-06-04 11:27:24,305 INFO  [STDOUT] strURL in Inventry --> http://1**.1**.**.27:7777/GatewayServlet
/Status?Str=Inventory&PARTNUM=200A104%27%2C%27200A112%27%2C%27200A114%27%2C%27200A113%27%2C%27200A117%27%2C%27200A120%27%2C%27240A503%27%2C%27200A132%27%2C%27200A128%27%2C%27200A124
2011-06-04 11:28:06,243 ERROR [STDERR] java.net.SocketException: Unexpected end of file from server
2011-06-04 11:28:06,243 ERROR [STDERR]  at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
2011-06-04 11:28:06,243 ERROR [STDERR]  at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
2011-06-04 11:28:06,243 ERROR [STDERR]  at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
2011-06-04 11:28:06,243 ERROR [STDERR]  at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
2011-06-04 11:28:06,243 ERROR [STDERR]  at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
2011-06-04 11:28:06,243 ERROR [STDERR]  at com.cim.web.servlet.DBGatewayServiceServlet.processRequest(DBGatewayServiceServlet.java:52)
2011-06-04 11:28:06,243 ERROR [STDERR]  at com.cim.web.servlet.DBGatewayServiceServlet.doGet(DBGatewayServiceServlet.java:113)
2011-06-04 11:28:06,243 ERROR [STDERR]  at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
2011-06-04 11:28:06,243 ERROR [STDERR]  at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
2    011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
2011-06-04 11:28:06,243 ERROR [STDERR]  at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
2011-06-04 11:28:06,243 ERROR [STDERR]  at java.lang.Thread.run(Unknown Source)

我的Servlet中的代码（客户端）：

if(queryString.equals("Inventory")) {

   String partNum = (String)session.getAttribute("PARTNUM");
   String locId = (String)session.getAttribute("locids");

   strURL = strURL+"/InventoryStatus?queryStr=Inventory&PARTNUM="+partNum;

   URLConnection dbGatewayURL = new URL(strURL).openConnection();

   BufferedReader in = new BufferedReader(new InputStreamReader(dbGatewayURL.getInputStream()));//--This is line 52 Mentioned in Error above

   StringBuffer responseData = new StringBuffer();
   String line="";

   while((line = in.readLine()) != null) {
      responseData.append(line);
   }

   String result =responseData.toString();
   request.setAttribute("inventryStock",result);

   RequestDispatcher rd=request.getRequestDispatcher ("inventryStatus.jsp?resp=Yes");
   rd.forward(request, response);  
}
3个回答
2
尝试从您的服务器 telnet 到远程 servlet 并查看是否如预期连接。如果没有，则存在连接问题。 如果可以连接，请尝试使用 TCP Monitor 查看从您的服务器到拥有 servlet 的远程服务器的 HTTP 流量。 http://ws.apache.org/commons/tcpmon/
1
尝试在 URLConnection dbGatewayURL = new URL(strURL).openConnection(); 之后立即使用 wait()。
程序有可能在建立连接之前就已经执行到了下一行。
好的，没运气了...做了下面的更改，又出现了另一个异常： - Warrior
1

代码没有问题，但问题在于远程服务器没有监听来自我的服务器的连接，因此我尝试在另一个远程服务器上使用相同的代码，这次运行良好....！有人知道原因吗............？

谢谢，需要将我的服务器添加到受信任的主机列表中。虽然这是基于SOAP的调用，但由于我的服务器不在受信任的主机列表中，我得到了类似的跟踪信息。 - cpandey05
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