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AI-generatedFailed to obtain/user credentials when Kerberos ticket expires in Hadoop YARN
When a Kerberos ticket used by a long-running Hadoop job expires, the client throws an AuthenticationFailedException with the message “Failed to obtain/user credentials”, causing the operation to fail unless the ticket is renewed manually or the job is restarted. The goal is to allow such jobs to continue running without manual re‑login by enabling automatic
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