Question

我正在尝试修复自从我们从Tomcat 6.0.26升级到7.0.52以来已经出现的Web应用程序中的错误。该应用程序基本上是从另一个网站获取内容的代理，违规代码如下：

public static synchronized void connect(String externalServiceUrl, HttpServletResponse response) throws IOException {

    log.info("Connecting to " + externalServiceUrl);
    URLConnection serverConnection = new URL(externalServiceUrl).openConnection();
    serverConnection.setDoInput(true);
    serverConnection.setDoOutput(false);

    Map responseMap = serverConnection.getHeaderFields();
    for (Iterator iterator = responseMap.keySet().iterator(); iterator.hasNext();) {
        String key = (String) iterator.next();

        List values = (List) responseMap.get(key);
        for (int i = 0; i < values.size(); i++) {
            Object o = values.get(i);
            response.setHeader(key, o.toString());
        }
    }

    OutputStream toClient = response.getOutputStream();

    try {
        BufferedInputStream fromServer = new   BufferedInputStream(serverConnection.getInputStream());

        int bytie;
        try {
            while ((bytie = fromServer.read()) != -1) {
                toClient.write(bytie); // Exception thrown from here
            }
        } catch (RuntimeException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        fromServer.close();
    } catch (IOException e) {
        log.severe("Cannot connect to external service with URL " + externalServiceUrl);
        e.printStackTrace();
    } finally   {
        toClient.flush();
        toClient.close();
    }
}

抛出以下异常：

ClientAbortException:  java.net.SocketException: Connection reset
    at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:413)
    at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:480)
    at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:310)
    at org.apache.catalina.connector.OutputBuffer.writeByte(OutputBuffer.java:457)
    at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:77)
    at org.springframework.security.web.context.SaveContextOnUpdateOrErrorResponseWrapper$SaveContextServletOutputStream.write(SaveContextOnUpdateOrErrorResponseWrapper.java:203)
    at nz.cri.gns.boardaccess.proxy.ProxyHelper.connect(ProxyHelper.java:72)

...
Caused by: java.net.SocketException: Connection reset
    at java.net.SocketOutputStream.socketWrite(Unknown Source)
    at java.net.SocketOutputStream.write(Unknown Source)

这通常表示用户已离开页面导致浏览器关闭连接，但情况并非如此。我已经在Chrome，IE8和Firefox中测试了所有相同的结果 - 浏览器上的“网页不可用”消息以及服务器上面的堆栈跟踪。 toClient.write(bytie);行通常执行20k +次，因此在连接关闭之前，大约有一半的文件被写入响应。这种情况发生的时间不到一秒，因此不太可能是由Tomcat的connectionTimeout设置引起的（默认设置为20000ms）。

连接过早关闭Tomcat 7.0.52

0 个答案: