PoolingHttpClientConnectionManager:如何做Https请求？

我正在尝试同时做多个HttpGet请求CloseableHttpClient.
我搜索了如何做到这一点,答案是使用一个PoolingHttpClientConnectionManager.

此时我得到了这个:

PoolingHttpClientConnectionManager cManager = new PoolingHttpClientConnectionManager();
CloseableHttpClient httpClient = HttpClients.custom()
    .setConnectionManager(cManager)
    .build();

然后我尝试了一个HttpGet请求http://www.google.com,一切正常.

然后,我通过创建一个CMD信任和进口目标网站的证书,设置一个SSLConnectionSocketFactory与我的信任和设置SSLSocketFactory的httpClient:

KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
FileInputStream inputStream = new FileInputStream(new File("myTrustStore.truststore"));
trustStore.load(inputStream, "nopassword".toCharArray());
inputStream.close();

SSLContext sslContext = SSLContexts.custom().loadTrustMaterial(trustStore).build();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslContext,
    SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);

PoolingHttpClientConnectionManager cManager = new PoolingHttpClientConnectionManager();
CloseableHttpClient httpClient = HttpClients.custom()
    .setSSLSocketFactory(sslsf)
    .setConnectionManager(cManager)
    .build();

如果我尝试执行Https,HttpGet那么我会得到一个PKIX path building failed例外.
如果我做同样的.setConnectionManager(cManager)事情,一切正常.

谁能告诉我如何让这个工作？(别担心,我不创建任何ddos工具)

提前致谢!

PS:我正在使用HttpComponents 4.3.1