Bigdata

Enable verbose Kerberos and token logging on Spark driver and executor nodes to capture the diagnostic data you need when authentication is failing. Covers log4j configuration files and the exact spark-submit flags to wire them in.

A troubleshooting guide for the Kerberos error ‘Cannot find key of the appropriate type to decrypt AP REP,’ covering encryption type mismatches between keytabs and Active Directory, plus practical steps to align AES and RC4 settings.