Tailscale Debug Log: Tracking Down a 16-Year-Old SQLite WAL Bug
JeremyCMorgan · x · 2026-08-20
Tailscale published a detailed technical post-mortem on tracking down a 16-year-old WAL race condition bug deep within SQLite. The bug caused intermittent database corruption and service instability from last year into early 2026. The post highlights the forensic workflow: reproducing rare corruption, eliminating hypotheses, and working upstream. Tailscale has used SQLite as its primary database since 2022, and this fix underscores the importance of deep debugging skills in maintaining reliable infrastructure.
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