sockets java。网SocketException:没有可用的缓冲区空间（已达到最大连接数？）：连接
您好，我正在使用Apache HTTP Client 4.0在基于HTTPS协议的服务器上上载一些文件。上载的应用程序正在全天候运行。今天，它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)
有人能帮我吗？我完全不知道发生了什么事
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;
}
# 1 楼答案
我的windows2008服务器在几天前也发生了同样的问题，我无法通过编码快速修复这个问题，然后我重新启动了我的服务器问题消失了，这个呃
# 2 楼答案
服务器必须为以下链接定义几个“临时端口”： http://dbaktiar-on-java.blogspot.ro/2010/03/hudson-shows-buffer-space-available.html http://support.microsoft.com/kb/196271
这就解决了：按照上面的步骤，“套接字不足”错误就消失了
问题仅限于2003服务器
# 3 楼答案
我的猜测是：您的端口正在耗尽，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。与其他机器打开的连接太多，这会导致问题
寻找什么：
HttpClient并重用此实例。它们是cases，其中实例化多个HTTP客户端而不正确释放连接会导致网络连接堆叠，并且永远不会关闭。尝试httpPost.releaseConnection()。您可能还对HTTP客户机文档感兴趣，chapter 1.1.5, "Ensuring release of low level resources"# 4 楼答案
这似乎是一个Windows问题，或者是关于临时端口，或者是关于afd中的一个bug。sys，具体取决于您的Windows版本。 请参阅to my answer to a similar question on stackoverflow
# 5 楼答案
可能是因为您的服务器（数据库/Http）连接耗尽。使用连接池或减少最大连接数可以解决此问题