Error: Unable to find valid certification path to requested target

To fix this issue, perform the following steps:

1. Get the public cert:
   # openssl s_client -connect tm1server.tux:5010 -servername tm1server.tux:5010 < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > public.crt

2. Import into the java store:
   # /usr/lib/jvm/java-8-openjdk-amd64$ sudo bin/keytool -import -alias tm1server.tux -keystore jre/lib/security/cacerts -file /home/administrator/public.crt

📓 Keystore Password

The password for keystore is usually "changeit" without quotes.