我将HttpClient 3..0.1与MultiThreadedHttpConnectionManager一起使用,并使用以下代码来获取页面,并获得该页面的最终重定向URL。

多个线程并行访问此代码。运行这段代码一段时间后,我开始连续获取ConnectionPoolTimeoutException,然后没有进一步提取任何页面。

这是否与我应该增加的connectionManagerParam值有关,或者我在代码中做错了什么?

GetMethod get = null;
    try {
        get = new GetMethod();
        get.setURI(uri);
        get.setFollowRedirects(false);
        int status = httpClient.executeMethod(null, get, new HttpState());

        String location = null;
        int retry = 2;
        if (get.getResponseHeader("location") != null) {
            location = get.getResponseHeader("location").getValue();
        }
        while (retry > 0 && ((int) (status / 100) != 2) && ((int) (status / 100) == 3) && location.length() > 0) {
            // To get the final redirected url.
            uri = URLUtil.createAbsoluteURIWithFix(location, null);
            get = new GetMethod();
            get.setURI(uri);
            get.setFollowRedirects(false);
            status = httpClient.executeMethod(null, get, new HttpState());
            if (get.getResponseHeader("location") != null) {
                location = get.getResponseHeader("location").getValue();
            }
            retry--;
        }

        if (status == 200) {
            uri = get.getURI();
            String html = URLUtil.getResponseBodyAsString(get, charsets);
        }
    } catch (Exception e) {

    } finally {
        if (get != null) {
            get.releaseConnection();
        }
    }


异常stackTrace

org.apache.commons.httpclient.ConnectionPoolTimeoutException: Timeout waiting for connection
    at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.doGetConnection(MultiThreadedHttpConnectionManager.java:490)
    at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.getConnectionWithTimeout(MultiThreadedHttpConnectionManager.java:394)
    at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:152)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:396)


我需要在每个execute方法之后调用get.releaseConnection()吗?还是目前的编码还可以?

最佳答案

似乎您没有关闭第一个get并创建一个对相同var影响的新对象。
并循环做同样的事情。

您应该在此代码中仅保留一个实例,并在全局try / final中最后将其清除。

关于java - HttpMethod.releaseConnection()的用法,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/11946577/

10-09 04:12