Why Does My Java Application Still Show 'Unable to Find Valid Certification Path' After Importing a Self-Signed Certificate?

Unable to Find Valid Certification Path to Requested Target Error

Despite importing the self-signed certificate into the Java Runtime Environment (JRE) of the Glassfish server, users may still encounter the "unable to find valid certification path to requested target" error when attempting to post to a server with a self-signed certificate.

This issue can arise due to the application server using a different trust store than the one where the certificate was imported. To resolve this:

1. Utilize the -Djavax.net.debug argument along with the -Djavax.net.ssl.trustStore argument to specify the correct trust store. For example:

java -Djavax.net.debug=all -Djavax.net.ssl.trustStore=trustStore ...

2. Understand the distinction between the keystore, which contains the private key and certificate used to verify the user's own identity, and the trust store, which specifies which entities are considered trustworthy.
3. Ensure that the user's own identity also has a chain of trust leading to a root, separate from any chains to roots for entities that the user trusts.

By following these steps, users can adjust trust store settings and gain a clearer understanding of trust relationships to resolve the "unable to find valid certification path to requested target" error for self-signed certificates.

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