secrets created with Java 16 not valid

[rohits-dev]

While following the lab, for creating secure cluster I found that if java 16 is default java version or active version then keystore.jks created with it are incompatible with kafka broker. to workaround the script should use legacy switch
-J-Dkeystore.pkcs12.legacy in keytool create key command as OpenJDK16 has improved to use more secure algorithm by default which are not supported in Java 8 and 11.
This stackoverflow question helped me identify the issue on my machine. of course when I set jdk 11 as active version it is not a problem.