Motivation

The ResourceLock revalidation, after a session expiry, is only getting triggered after the signal of session reconnected. If this is not coming through, there is no further attempt to re-validate and re-acquire the lock.

We should improve the logic to also add timed-based retry logic, with exponential backoff.

Modifications

• Moved Backoff class from pulsar-client -> pulsar-common so that it can be used from pulsar-metadata module.
• Added additional time based logic that triggers revalidation

Verifying this change

• Make sure that the change passes the CI checks.

(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

(or)

This change is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

(example:)

• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Does this pull request potentially affect one of the following parts:

If the box was checked, please highlight the changes

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

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