Java Apache HttpClient HttpRequestRetryHandler从未调用

我正在使用Apache HTTP commons

DefaultHttpClient

，构建之后，我将设置其重试处理程序：

httpClient.setHttpRequestRetryHandler(new HttpRequestRetryHandler() {
                @Override
                public boolean retryRequest(final IOException ioe,
                        final int numRetry, final HttpContext context)
                {
                    Log.d(TAG, "retry handler received exception of type: " + ioe.getClass().getName() + ", num retries: " + numRetry);
                    if (numRetry > 4) { // 3 retries
                        return false;
                    }
                    // Some exceptions we can retry without knowledge of which methods are being invoked
                    if (ioe instanceof NoHttpResponseException
                            || ioe instanceof UnknownHostException
                            || ioe instanceof SocketException) {
                    }
                    return false;
                }
        });

我向其发送请求的服务器经常超时，在execute（）调用的

catch

中，我收到一个IO错误，“操作超时”，但我从未在控制台输出中看到任何“retry handler received exception of type”日志语句。我所有的请求都是POST请求，但它们是幂等的——它们可以安全地多次调用，而不会产生不良副作用

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我是否错误地设置了重试处理程序？重试处理程序是否仅在某些情况下调用？

尝试使用DefaultHttpRequestRetryHandler，它是HttpRequestRetryHandler的子类，如果在处理程序中处理了异常情况，则返回true

这样可以防止抛出异常

您还可以在处理程序中处理超时异常

httpClient.setHttpRequestRetryHandler(new HttpRequestRetryHandler() {
                @Override
                public boolean retryRequest(final IOException ioe,
                        final int numRetry, final HttpContext context)
                {
                    Log.d(TAG, "retry handler received exception of type: " + ioe.getClass().getName() + ", num retries: " + numRetry);
                    if (numRetry > 4) { // 3 retries
                        return false;
                    }
                    // Some exceptions we can retry without knowledge of which methods are being invoked
                    if (ioe instanceof NoHttpResponseException
                            || ioe instanceof UnknownHostException
                            || ioe instanceof SocketException
                            // Replace with the actual type of the exception
                            || ioe instanceof TimeoutException) {
                                  return true;
                    }
                    return false;
                }
        });

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不幸的是，我不再有权访问项目源代码，所以我无法尝试。