restful/HttpInvoker http连接泄露

[dingjs]

        CloseableHttpResponse response =  httpclient.execute(httpPost);
        int responseCode = response.getStatusLine().getStatusCode();
        if(responseCode==200){
            HttpEntity responseEntity = response.getEntity();
            if(responseEntity!=null){
                return EntityUtils.toByteArray(responseEntity);
            }
        }else if(responseCode==404){
            throw new RpcException(RpcException.UNKNOWN_EXCEPTION,"not found service for url ["+url+"]");
        }else if(responseCode==500){
            throw new RpcException(RpcException.NETWORK_EXCEPTION,"occur an exception at server end.");
        }

CloseableHttpResponse需要在finally中关闭，不然responseCode在不等于200的情况下，连接就没关闭，导致连接泄露。