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In a Hadoop cluster using Kerberos, a user reports 'Ticket expired' errors after some time. What is the best solution to avoid this issue?

hard📝 Application Q9 of 15
Hadoop - Security
In a Hadoop cluster using Kerberos, a user reports 'Ticket expired' errors after some time. What is the best solution to avoid this issue?
AConfigure ticket renewal with a valid renewable lifetime
BIncrease HDFS block size
CDisable Kerberos authentication temporarily
DRestart the NameNode service frequently
Step-by-Step Solution
Solution:

  1. Step 1: Understand ticket expiration in Kerberos

    Kerberos tickets have a lifetime and can expire, causing authentication failures.

  2. Step 2: Identify solution to prevent expiration issues

    Configuring ticket renewal with a renewable lifetime allows tickets to be refreshed automatically.

  3. Final Answer:

    Configure ticket renewal with a valid renewable lifetime -> Option A

  4. Quick Check:

    Renew tickets to avoid expiration errors [OK]
Quick Trick: Use renewable tickets to prevent expiration errors [OK]
Common Mistakes:
  • Disabling security
  • Restarting services unnecessarily

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