Flink
Debugging Flink Backpressure and Checkpoints: Locate the Slow Stage First
Use a source-to-sink pipeline to distinguish downstream bottlenecks, data skew, state I/O, and barrier-alignment delays.
Troubleshooting
Earlier notes · 2021
Merging Jupyter Notebooks and Fixing an Encoding Problem
An archived note on combining notebook cells and outputs with nbmerge, and diagnosing an incorrectly encoded output file.