JAX-RS Client, javax.net.ssl.SSLHandshakeException and Solution

The following exception:

javax.ws.rs.ProcessingException: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: 
PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: 
unable to find valid certification path to requested target
    at org.glassfish.jersey.client.internal.HttpUrlConnector.apply(HttpUrlConnector.java:284)
    at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:278)
    at org.glassfish.jersey.client.JerseyInvocation.lambda$invoke$1(JerseyInvocation.java:767)

is thrown during the initialization of JAX-RS / HTTPs connection and caused by the lack of a certificate in Java's keystore. A certificate import fixes the problem, for System Tests, however, a certificate verification is not required (except in cases where certificate verification is tested) and can be omitted:

public class SSLClientIT {
        private Client client;
        private String host = "https://...;
        private WebTarget tut;
        public void init() throws KeyManagementException, NoSuchAlgorithmException {
            TrustManager[] noopTrustManager = new TrustManager[]{
                new X509TrustManager() {
                    public X509Certificate[] getAcceptedIssuers() {
                        return null;
                    public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType) {
                    public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType) {
            SSLContext sc = SSLContext.getInstance("ssl");
            sc.init(null, noopTrustManager, null);
            this.client = ClientBuilder.newBuilder().
            this.tut = this.client.target(this.host);
        public void get() {
            String result = this.tut.request().get(String.class);
            System.out.println("result = " + result);

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