Java: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

The problem appears when your server has self signed certificate. To workaround it you can add this certificate to the list of trusted certificates of your JVM.

In this article author describes how to fetch the certificate from your browser and add it to cacerts file of your JVM. You can either edit JAVA_HOME/jre/lib/security/cacerts file or run you application with -Djavax.net.ssl.trustStore parameter. Verify which JDK/JRE you are using too as this is often a source of confusion.

See also: How are SSL certificate server names resolved/Can I add alternative names using keytool? If you run into java.security.cert.CertificateException: No name matching localhost found

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