# Common Runtime Errors ## About This section captures frequently encountered runtime failures that occur in production systems due to resource exhaustion, misconfiguration, or design oversights. It focuses on critical low-level issues such as out-of-memory errors, native thread limits, file descriptor exhaustion, garbage collection stalls, and CPU saturation. ## **Importance in System Design** * **Reveals the hidden costs of poor design choices**: Using unbounded queues or thread pools may work in test environments but lead to production crashes. * **Promotes production-aware architecture**: Understanding runtime errors helps you design systems that stay healthy under stress. * **Links theory to practice**: Shows how architectural patterns (e.g., concurrency, async processing) translate into real-world risks. * **Strengthens operational readiness**: Anticipating common runtime issues allows better defaults, safeguards, and observability from the beginning. * **Supports capacity planning and resource tuning**: Helps determine sensible limits for threads, memory, and CPU in design and deployment configurations. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.pranaypourkar.co.in/the-programmers-guide/system-design/operational-issues/common-runtime-errors.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.