Lessons from debugging a tricky direct memory leak

Lessons from debugging a tricky direct memory leak

摘要

To support metrics reporting for ads from external advertisers and real-time ad budget calculations at Pinterest, we run streaming pipelines using Apache Flink. These jobs have guaranteed an overall 99th percentile availability to our users; however, every once in a while some tasks get hit with nasty direct out-of-memory (OOM) errors on multiple operators.