I want to disable cluster.routing.use_strict_weighted_shard_preference on managed opensearch cluster domain

Question

I'm unable to use the Alerting plugin monitors (per query and per bucket) 
due to the following error:

"PreferenceBasedSearchNotAllowedException: Preference type based routing 
not allowed with strict weighted shard routing enabled"

cluster.routing.use_strict_weighted_shard_preference is enabled by default 
on managed domains but cannot be changed via cluster settings API.

Could anyone please help me to disable cluster.routing.use_strict_weighted_shard_preference 
on our domain so that the Alerting plugin monitors can execute search queries 
normally?

"version": {
    "distribution": "opensearch",
    "number": "3.3.0",
    "build_type": "tar",
    "build_hash": "unknown",
    "build_date": "2025-12-22T16:42:07.599198842Z",
    "build_snapshot": false,
    "lucene_version": "10.3.1",
    "minimum_wire_compatibility_version": "2.19.0",
    "minimum_index_compatibility_version": "2.0.0"
  }

Riku_Kobayashi · Answer

Hello.

To my knowledge, that setting cannot be changed in AWS OpenSearch.  
The response to the following reply also stated that it could not be changed.  
As mentioned in the answer below, contacting AWS support may resolve the issue.  
https://repost.aws/questions/QUZ6T3FrI5SX6Dnbfh3tE3ig/aws-opensearch-alerts-issue-after-upgrade-from-2-9-to-3-1-version#ANrs_aRiSrS9qvtUFU466OVw

Jeongho Kim · Answer

Hi, mehdi.
You can change "cluster.routing.weighted.strict" cluster setting by contacting AWS Technical Support.
[+] https://console.aws.amazon.com/support/home#/case/create?issueType=technical
Thank you.

I want to disable cluster.routing.use_strict_weighted_shard_preference on managed opensearch cluster domain

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