November 2025 monthly summary for open-telemetry/opentelemetry-collector-contrib: Key feature delivered: Datadog Receiver: Thread-safe LRU Cache Replacement by switching from a non-thread-safe simplelru to golang-lru's thread-safe LRU to improve concurrency safety. Commit reference: b35fce189865f1ee1ef43874c8f5a02719c0c3c8. Major bugs fixed: Addresses concurrency risks in the Datadog receiver cache, linked to issue 42644; may also help with 40557 though not reproduced; testing performed per contributing guidelines to validate correctness and race conditions. Overall impact and accomplishments: Improves reliability and throughput of Datadog ingestion by reducing race conditions in the cache layer; aligns with reliability and performance goals for the collector-contrib repo; demonstrates effective code maintenance and testing discipline in a high-concurrency path. Technologies/skills demonstrated: Go; thread-safe caches (golang-lru); concurrency safety; code testing and validation per contributing guidelines; issue tracking and traceability.