Fixes #xyz

Main Issue: #xyz

PIP: #xyz

Motivation

Fixed race conditions in thread safety tests that were causing intermittent IllegalReferenceCountException failures due to improper resource cleanup order and unrealistic concurrent write patterns.

Modifications

1. Enhanced Thread Safety Test Design

• Fixed concurrent write race condition: Changed testConcurrentContainsMessageWithWrites from concurrent writes to sequential writes with concurrent reads, matching real-world
  usage patterns where addMessage is called sequentially
• Improved test structure: Single writer thread generates sequential ledgerIds (1000, 1001, 1002...) while multiple reader threads concurrently call containsMessage()
• Added proper error handling: Enhanced exception tracking and reporting with detailed logging

2. Fixed Resource Cleanup Race Condition

• Resolved IllegalReferenceCountException: Fixed tearDown method to shutdown ExecutorService before closing tracker, preventing threads from accessing released Netty ByteBufs
• Improved cleanup order: Ensures all background threads are terminated before releasing resources

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

Matching PR in forked repository

PR in forked repository: apache#24620