How to Resolve 'sun.security.provider.certpath.SunCertPathBuilderException: Unable to Find Valid Certification Path'?

Java: sun.security.provider.certpath.SunCertPathBuilderException: Unable to Find Valid Certification Path to Requested Target

When attempting to download a file from an HTTPS server, you may encounter errors due to certificate issues. The error message "sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target" indicates a problem with the client-server authentication.

Ignoring Client-Server Authentication

If you wish to ignore the client-server authentication to bypass this error, here are the steps you can take:

1. Obtain the Server Certificate: Launch your preferred web browser and navigate to the HTTPS URL. Click on the lock icon in the address bar and select "Certificate." From here, you can export the SSL certificate.

2. Add the Certificate to JVM's Trust Store:

   • Using JAVA_HOME/jre: Navigate to JAVA_HOME/jre/lib/security/cacerts and use the keytool utility to import the certificate:

     keytool -importcert -alias my-server-cert -trustcacerts -keystore cacerts -file YOUR_EXPORTED_CERTIFICATE

   • Using -Djavax.net.ssl.trustStore parameter: Run your application with the following parameter:

     -Djavax.net.ssl.trustStore=YOUR_TRUST_STORE_PATH

3. Verify Correct JDK/JRE Version: Ensure that you are using the correct JDK/JRE version as this can lead to confusion.

By implementing these steps, you can ignore the client-server authentication and establish a secure connection to the HTTPS server.

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