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An admin sees cluster health stuck at yellow after adding a new node. What could fix this?

medium📝 Debug Q7 of Q15
Elasticsearch - Cluster Management
An admin sees cluster health stuck at yellow after adding a new node. What could fix this?
AIncrease replica count or wait for shard allocation
BRestart the cluster immediately
CDelete all indices
DDisable shard allocation permanently
Step-by-Step Solution
Solution:

  1. Step 1: Understand yellow status after node addition

    Yellow means replicas are unassigned; new node may need time to allocate shards.

  2. Step 2: Identify proper fix

    Increasing replica count or waiting allows shards to allocate properly; restarting or deleting indices is drastic and disabling allocation harms reliability.

  3. Final Answer:

    Increase replica count or wait for shard allocation -> Option A

  4. Quick Check:

    Yellow fix = allocate replicas or wait [OK]
Quick Trick: Wait or adjust replicas to fix yellow status [OK]
Common Mistakes:
MISTAKES
  • Restarting cluster unnecessarily
  • Deleting indices without cause
  • Disabling shard allocation

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