SocketException: Software caused connection abort: recv failed

[思年华]

最近写一个小爬虫；当多开了几个线程就会报错，一般报错的位置偏后：
SocketException: Software caused connection abort: recv failed
I/O exception (java.net.SocketException) caught when processing request: Software caused connection abort: recv failed
(java.net.SocketException) caught when processing request: Connection reset
在网上找了很久的资料，说是可能是客户端没有主动关闭连接。自己找了，但一直找不出问题所在；请各位大牛赐教。

private InputStream doGetRequest(final HttpContext context) throws Exception {
		HttpResponse response = null;
		HttpClient httpclient = null;
		try {
			httpclient = new DefaultHttpClient();//BasicHttpClient.getHttpClient();
			response = httpclient.execute(httprequest, context);
			int status = response.getStatusLine().getStatusCode();
			if (status == HttpStatus.SC_OK) {

				
				BasicEntry basicEntry = this.getBasicEntry(response);	
				return this.getContentStream(basicEntry);
			} else {
				throw new CrawlerException("http status error!" + status);
			}
		} catch (Exception e) {
			throw e;
//			throw new CrawlerException(e + " " + httprequest.getURI().toString());
		}
		finally{
			 httprequest.releaseConnection();
			 httpclient.getConnectionManager().closeExpiredConnections();
			 httpclient.getConnectionManager().closeIdleConnections(0, TimeUnit.SECONDS);
			 httpclient.getConnectionManager().shutdown();
			
		}
	}

private BasicEntry getBasicEntry(HttpResponse response) throws Exception {
		InputStream in = null;
		try {
			ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
			HttpEntity entity =response.getEntity();  
			if( entity != null ){   
				in = entity.getContent(); 
			}
	
			if(in.available() <= 0){
				int c = -1;
				while ((c = in.read()) != -1) {
					byteArray.write(c);
				}
			}

			byte[] bytes = byteArray.toByteArray();

			String charset = EntityUtils.getContentCharSet(response.getEntity());
			String contentType = null;
			try {
				contentType = response.getEntity().getContentType().getValue().toLowerCase();
			} catch (Exception e) {
				contentType = "text/html";
			}
			return new BasicEntry(bytes, contentType, charset);
		} catch (Exception e) {
			throw e;
		}
		finally{
			 if (in != null){  
	            try  
	            {  
	                in.close();  
	            }  
	            catch (IOException e)  
	            {  
	                e.printStackTrace ();  
	            }
			 }
		}
	}

[tangxingyou]

是不是jdk版本的问题，jdk1.7出现这个问题，但换成jdk1.6就好了。。。