17

您好我正在使用 Apache HTTP Client 4.0 在基于 HTTPS 协议的服务器上上传一些文件。上传的应用程序运行 24x7。今天突然开始抛出这个异常-

java.net.SocketException: No buffer space available (maximum connections reached?): connect
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.PlainSocketImpl.doConnect(Unknown Source)
    at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(Unknown Source)
    at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:333)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:123)
    at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:147)
    at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:101)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:381)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:641)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:576)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:554)

谁能帮帮我吗？我完全不知道发生了什么？

这是上传文件的源代码 -

public File call() throws Exception {           
            HttpClient httpclient = new DefaultHttpClient();
        try{            
            httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);         
            /*
             * Create POST REQUEST
             */
            HttpPost httpPost = new HttpPost(this.URL);
            /*
             * Create MultipartRequestEntity
             */
            MultipartEntity multipartEntity = new MultipartEntity( HttpMultipartMode.BROWSER_COMPATIBLE );
            /*
             * Add POST Parameters
             */
            multipartEntity.addPart(parameters[0], this.fileBody);
            multipartEntity.addPart(parameters[1], new StringBody(this.TYPE));
            multipartEntity.addPart(parameters[2], new StringBody(this.MAAID));
            /*
             * Add this POST Method
             */
            httpPost.setEntity(multipartEntity);
            /*
             * Upload the file
             */
            HttpResponse response = httpclient.execute(httpPost);
            int responseCode = response.getStatusLine().getStatusCode();
            logger.info("Response Code of HTTP Connectivity ["+ responseCode + "], " +
                                                            "it means ["+ response.getStatusLine().getReasonPhrase()+"]");
            /*
             * Check the server Response
             */
            HttpEntity entity = response.getEntity();
            if(entity != null){
                String status = EntityUtils.toString(entity);
                logger.info("Status of file upload from Server >>"+ status+"<<");
                entity.consumeContent();
                if(status.equalsIgnoreCase("OK")){
                    return this.fileBody.getFile();
                }
            }else{
                logger.error("Unable to retrieve status of file upload from server");
            }           
        }catch(NoRouteToHostException e){
            logger.error("Internet connection to ["+ this.URL + "] is not available", e);
        }catch(SocketException e){
            logger.error("Unable to connect to "+ this.URL, e);
        }catch (Exception e) {          
            logger.error("Exception while uploading the file["+ this.fileBody.getFilename()+ "] on ["+ this.URL+"]", e);
        }finally{
            try{
                httpclient.getConnectionManager().shutdown();
            }catch(Exception e){
                // Ignore this exception
            }
        }
        return null;
    }
4

5 回答 5

27

我的猜测：您的端口用完了，问题与您的代码没有直接关系，而是与服务器的当前状态有关。与其他机器打开了太多连接，这会导致问题。

要找什么：

  • 您的服务器是否处于大量使用可能导致打开多个网络连接的情况？
  • HTTP 客户端文档建议仅实例化一个并重HttpClient用此实例。它们是实例化多个 HTTP 客户端并且未正确释放连接导致网络连接堆叠并且永远不会关闭的情况。尝试httpPost.releaseConnection()。您可能还对 HTTP 客户端文档感兴趣，第 1.1.5 章，“确保释放低级资源”
于 2011-05-20T07:39:13.960 回答
3

服务器必须在以下链接中定义几个“临时端口”： http: //dbaktiar-on-java.blogspot.ro/2010/03/hudson-shows-buffer-space-available.html http://support。 microsoft.com/kb/196271

This is solved : followed the steps above an "out of sockets" errors are gone.

Issue is limited to 2003 server.

于 2015-04-06T14:25:08.120 回答
1

可能会发生，因为您的服务器（数据库/Http）已用尽连接。使用连接池或减少最大连接数可以解决此问题。

于 2013-01-06T08:29:05.110 回答
1

This appears to be a Windows issue, either about ephemeral ports, or about a bug in afd.sys, depending on your version of Windows. Please refer to my answer to a similar question on stackoverflow

于 2015-04-17T14:52:23.620 回答
0

My windows2008 server happened the same issue days ago,I could not fix this problem quickly by coding,and then I rebooted my server the issue be gone,this er

于 2021-07-01T03:13:48.623 回答