Elastic Certified Engineer (ECE)

You run GET /_cluster/allocation/explain and see 'no_attempt' for a shard. What is the most likely cause?

The shard is actively being relocated Allocation is disabled via cluster.routing.allocation.enable set to 'none' The node hosting the shard has left the cluster The index has been closed

Correct Answer:

Allocation is disabled via cluster.routing.allocation.enable set to 'none'

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