Worked on enhancing the reliability of scheduled tasks in the apache/pinot repository by addressing a critical validation issue in the Minion Instance Tag logic. Focused on backend development using Java, the work involved refining configuration management and validation logic to ensure that minion instances with the required tags are always available before task execution. This fix prevents task failures due to missing or misconfigured instances. The solution included improved error messaging and comprehensive tests to cover new validation scenarios, increasing both debuggability and test coverage. These changes contributed to more robust scheduling reliability and reduced downtime for Pinot scheduled tasks.