Sojan Mathew enhanced error handling and observability in the temporalio/sdk-java repository by delivering a targeted feature that introduces a default failure cause for unhandled workflow task exceptions. Using Java and backend development skills, Sojan implemented logic to improve error categorization in observability tools, enabling faster triage and root cause analysis for workflow failures. The approach preserved existing behavior for NonDeterministicException to maintain backward compatibility, ensuring that legacy workflows remained unaffected. This work focused on maintainability and reliability, laying the foundation for improved customer support and diagnosis. Unit testing was used to validate the changes and support future maintenance efforts.