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[BUG] Remote state read thread-pool build up on download task timeout #17411

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@SwethaGuptha

Description

@SwethaGuptha

Describe the bug

With remote publication, in case of an full cluster state download timeout, threads continue to work on the read tasks in thread pool even though the cluster state download attempt has been marked as failed. This causes the queue build up and impacts the threads available for subsequent downloads.

Related component

Cluster Manager

To Reproduce

  1. Create a cluster with data nodes having 2vcpu
  2. Create 10k indices
  3. Simulate node drop

Expected behavior

Tasks from timed-out cluster state download should be terminated.

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  • OS: [e.g. iOS]
  • Version [e.g. 22]

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