Piotr Prz worked on stabilizing MDC handling for Logback 1.2 compatibility within the Discovery Agent repository for apache/flink. He addressed a bug where null MDC context maps caused issues in older Logback versions by updating MdcUtils.java to ensure proper context restoration. To prevent future regressions, he introduced comprehensive regression test coverage in MdcLogbackCompatibilityTest.java, linking the work to FLINK-36227. His approach focused on compatibility testing, logging, and unit testing using Java, resulting in reduced runtime errors and improved observability for Flink integration. The work demonstrated careful attention to backward compatibility and reliability in a complex logging environment.