Security-related issues can manifest in various ways and can be associated with various sources, including Kerberos authentication, HDFS encryption, and TLS/SSL (data in transit encryption). This section includes error messages and troubleshooting for common issues and some architectural details about some of the underlying components.

For information about Sentry troubleshooting, see Troubleshooting Sentry.

• Error Messages and Various Failures
• Authentication and Kerberos Issues
• HDFS Encryption Issues
• Key Trustee KMS Encryption Issues
• Troubleshooting TLS/SSL Issues in Cloudera Manager
• YARN, MRv1, and Linux OS Security