开源库—HttpClient：ConnectionPoolTimeoutException

抛出ConnectionPoolTimeoutException的原因？

不管接口是否返回200，reponse里的entity都需要被消费，否则entity里的流不会关闭，造成连接泄露，抛出ConnectionPoolTimeoutException异常。

解决方法

接口返回200，正常获取返回的entity，如果没有返回200，使用EntityUtils.consumeQuietly(response.getEntity())消费reponse里的entity。

private String executeMethod(HttpUriRequest request) throws IOException {
    if (this.headers != null && this.headers.size() > 0) {
        for (Map.Entry<String, String> entry : this.headers.entrySet()) {
            request.addHeader(entry.getKey(), entry.getValue());
        }
    }
    HttpClient httpClient = HttpConnectionManager.getInst().getHttpClient();
    HttpResponse response = httpClient.execute(request);
    int status = response.getStatusLine().getStatusCode();
    if (status == HttpStatus.SC_OK) {
        HttpEntity entity = response.getEntity();
        return entity != null ? EntityUtils.toString(entity, DEFAULT_CHARSET_NAME) : null;
    } else {
        //状态不是200的时候reponse的流也要消费一下，否则连接不会返回连接池，导致连接泄露
        EntityUtils.consumeQuietly(response.getEntity());
        throw new ClientProtocolException("Unexpected response status: " + status);
    }
}