@raghu9raghavend This error is coming due the the Kerberos Authentication is configured for your RM UI. You have 2 options:
1. Configure Browsers for Kerberos Authentication (Recommended)
2. Disable the Kerberos Authentication for Web UI from service configuration. CM > Yarn > Configuration > Enable Kerberos Authentication for HTTP Web-Consoles > Disable/uncheck this option and restart Yarn.
Cheers!
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