## How to Resolve \'PKIX Path Building Failed: Unable to Find Valid Certification Path to Requested Target\'?

PKIX Path Building Failed: Unable to Find Valid Certification Path to Requested Target

Your client is encountering the error "PKIX path building failed: unable to find valid certification path to requested target" when trying to establish an HTTPS connection. This typically indicates a problem with certificate validation.

To resolve this issue, perform the following steps:

1. Check if the Service Certificate is Valid: Ensure that the server certificate presented by the HTTPS service is valid and up-to-date. Verify its expiration date and issuer.
2. Install Intermediate CA Certificates: If the service certificate is signed by an intermediate certificate authority (CA), you need to install the intermediate CA certificates in the Java truststore.
3. Set the Keystore for Trust Verification: Use the System.setProperty() method to specify the path to the truststore containing the service certificate and intermediate CA certificates:

<code class="Java">System.setProperty("javax.net.ssl.trustStore", "clientTrustStore.key");
System.setProperty("javax.net.ssl.trustStorePassword", "qwerty");</code>

4. Create a Client Keystore for IE and Firefox: Browsers like IE and Firefox use their own certificate stores. Consider creating a client keystore specific to the Java client, which can be referenced using the ClientKeyStore property in the TLS configuration.

Note: Specific certificate requirements may vary based on the HTTPS service you are accessing. Consult the service documentation or contact the service provider for further guidance.

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