Trying to start a new installation of the S3 agent and the log only shows the message:
ERROR: Connection Failed.
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
Automic Workload Automation 21.0.x
S3 21.0
The connection to the S3 storage URL is HTTPS (ie https://s3._server).
The certificate for the S3 server was not in the Java cacerts trust store.
Get the certificate for the S3 storage server and import it into the Java cacerts trust store on the S3 agent server.
Either the Java keytool command or the GUI app Keystore Explorer can be used to import the certificate into the Java cacerts trust store.