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Summary

Remove flaky and unstable functionality of suggesting (i.e. guessing) of a cluster id. Use optional parameter clusterId instead.

For applications that use a single cluster database no changes are required. For application that access multiple database clusters, all connection string should be reviewed and a mandatory clusterId parameter should be added.

See clusterId parameter description at https://github.com/aws/aws-advanced-jdbc-wrapper/blob/main/docs/using-the-jdbc-driver/using-plugins/UsingTheFailover2Plugin.md

Description

remove suggested clusterId functionality
change logic of configuration parameter clusterId

Additional Reviewers

@karenc-bq
@aaron-congo

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

changelog
rebase and fix unit tests
remove suggested clusterId functionality; change logic of configuration parameter clusterId.
@sergiyvamz sergiyvamz merged commit 739c421 into main-3.x Oct 21, 2025
7 of 8 checks passed
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