[急]java.net.SocketException: Connection reset by peer: socket write error
要从一个被屏蔽的网站上下载一些东西,于是写了一个Servlet,将它传到了一台境外的服务器上.
让这台服务器去下载指定的资源,然后再回传给我.相当于一个代理吧.
- Java code
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String url = request.getParameter("url"); //得到要下载的资源的URL. if (!StringUtils.isNullOrEmpty(url)) { System.out.println(url); URL u = new URL(url); URLConnection conn = u.openConnection(); try { ///把响应头设置成一样的. for (Map.Entry<String, List<String>> m : conn.getHeaderFields() .entrySet()) { if (m != null && m.getKey() != null && m.getValue() != null && m.getValue().size() > 0) { response.setHeader(m.getKey(), m.getValue().get(0)); } } } catch (Exception e) { // TODO: handle exception e.printStackTrace(); CommonLog.log.warn(e); } InputStream in = conn.getInputStream(); //从 connection得到inputstream OutputStream out = response.getOutputStream(); //得到向客户端的输出流 try { IOUtils .write(conn.getInputStream(), response .getOutputStream()); //写数据. } catch (Exception e) { e.printStackTrace(); // TODO: handle exception CommonLog.log.warn(e); if (in != null) { in.close(); } if (out != null) { out.close(); } } } }IOUtils.write()代码如下:
- Java code
/** * 从input里面读取数据然后写入output，读完后自动关闭流。 * @param input inputStream * @param output outputStream * */ public static void write(InputStream input, OutputStream output) throws IOException { write(input,output,true); } /** * 自动从inputstream里面读数据，然后写到outputstream里面去。 * @param input inputstream * @param output outputstream * @param close 读完后是否自动关闭流。 * */ public static void write(InputStream input, OutputStream output,boolean close) throws IOException { byte[] b = new byte[1024]; int len = input.read(b); while (len != -1) { output.write(b, 0, len); len = input.read(b); } output.flush(); if (close) { input.close(); output.close(); } }将程序传到服务器上以后,在服务器上访问
http://localhost:8080/test/down?url=http://www.xxx.com/z.zip
可以下载成功.
但是当远程访问的时候,就会出现
java.net.SocketException: Connection reset by peer: socket write error
假设服务器IP是2.2.2.2吧.
访问
http://2.2.2.2:8080/test/down?url=http://www.xxx.com/z.zip
就会出现上面的那个错误.
注意,我并没有关闭浏览器或者按停止按钮.只要一打上那个地址就会出错.
错误发生在:
- Java code
output.write(b, 0, len);//执行这行代码的时候.
具体的错误信息如下:
- Java code
ClientAbortException: java.net.SocketException: Connection reset by peer: socket write error
at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:366)
at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:432)
at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:347)
at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:392)
at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:381)
at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:89)
at com.joejoe.utils.IOUtils.write(IOUtils.java:62)
at com.joejoe.utils.IOUtils.write(IOUtils.java:48)
at com.tqsoft.wdys.other.getMegavideo.doGet(getMegavideo.java:79)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:627)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at com.joejoe.utils.web.CharSetFilter.doFilter(CharSetFilter.java:39)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:875)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(Unknown Source)
at java.net.SocketOutputStream.write(Unknown Source)
at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:750)
at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:432)
at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:347)
at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:773)
at org.apache.coyote.http11.filters.IdentityOutputFilter.doWrite(IdentityOutputFilter.java:118)
at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:583)
at org.apache.coyote.Response.doWrite(Response.java:560)
at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:361)
... 27 more
请问如何解决.谢谢.
[解决办法]
我google过 原因我忘了 不过解决方法是用try catch包起来 对这异常不做处理
这样做确实没什么影响 不过是为什么 我也不是很清楚！
[解决办法]
[解决办法]
[解决办法]
试下这个了 不行我也没办法了：
引起该问题的原因是由于此时Server端连接已经被复位，而Client依然通过该连接在接收和发送数据，在网上搜索了一下该错误，发现该错误引起的原因大都是防火墙的原因。