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I am using Jetty HTTP Client (v9.2.5) To Send HTTP Request It is Work Fine For HTTP Request {Post,Get,...} But When I send HTTPS Request Post I See This

java.util.concurrent.ExecutionException: java.lang.NullPointerException
at org.eclipse.jetty.client.util.FutureResponseListener.getResult(FutureResponseListener.java:118)
at org.eclipse.jetty.client.util.FutureResponseListener.get(FutureResponseListener.java:101)
at org.eclipse.jetty.client.HttpRequest.send(HttpRequest.java:642)
My Function Is
private Object sendHttpPOSTRequest(String url, List<Header> headers,
        String content, HttpMethod method) {
    try {
        HttpClient client = new HttpClient();
        client.setMaxConnectionsPerDestination(16);
        client.setAddressResolutionTimeout(5000);
        client.setConnectTimeout(5000);
        client.setMaxRedirects(3);
        client.setFollowRedirects(true);
        client.setExecutor(_executor);
        client.start();
        Request req = client.POST(url).content(
                new StringContentProvider(content));
        if (headers != null)
            req = setHeaders(req, headers);
        req.header(HttpHeader.CONTENT_TYPE, "application/json");
        return req.send();
    } catch (Exception e) {
        e.printStackTrace();
        return "Failed";
Whats Wrong?
                Define at the Top of class private ExecutorService _executor = Executors.newCachedThreadPool();
– Ali Kianinejad
                May 5, 2015 at 11:57
For HTTPS you have to use the httpclient initialization like the following way:
// Instantiate and configure the SslContextFactory
SslContextFactory.Client sslContextFactory = new SslContextFactory.Client();
// Instantiate HttpClient with the SslContextFactory
HttpClient httpClient = new HttpClient(sslContextFactory);
// Configure HttpClient, for example:
httpClient.setFollowRedirects(false);
// Start HttpClient
httpClient.start();
You should use (see https://www.eclipse.org/jetty/documentation/current/http-client.html):
// Instantiate and configure the SslContextFactory
SslContextFactory.Client sslContextFactory = new SslContextFactory.Client();
// Instantiate HttpClient with the SslContextFactory
HttpClient httpClient = new HttpClient(sslContextFactory);
// Configure HttpClient, for example:
httpClient.setFollowRedirects(false);
// Start HttpClient
httpClient.start();
        
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