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Hello everyone, hope your year is off to a good start! In our resource list today we’ve got some very cool code repository diagrams, sage advice from Pinterest engineers on tuning Flink clusters, and a post on why ZenDesk uses mTLS with Kafka. Our "terminal tip" is Flink-themed this week, with a snippet demonstrating how to fix watermarking issues. You will also find several in-person meetups coming up soon, so if you’re near London, Bangalore, Berlin, Kansas City, or Sunnyvale in the next month or so, stop on by!
This week’s terminal tip focuses on Flink SQL: if your windows or MATCH_RECOGNIZE queries fail to produce any results, often the root cause is a problem with watermarking. You can use the built-in CURRENT_WATERMARK function to check if watermarks are being generated correctly. E.g., if your time attribute column is named $rowtime:
SELECT ..., $rowtime, CURRENT_WATERMARK($rowtime) FROM table;
In-person and online:
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