esh-pfi-infrastructure/persistent-memory.d/2026-09-15-two-restart-patterns-from-svos-dev-worth-stealing-a-dry-run.md

# `[2026-09-15]` Two restart patterns from svos-dev worth stealing: (a) DRY-RUN BOOT against the still-held port

⭐⭐ **Two restart patterns from svos-dev worth stealing: (a) DRY-RUN BOOT against the still-held port** — start the new process while the old one holds the socket; it proves every check above the bind and dies on `[Errno 98]`, so a one-way restart becomes a rehearsed one at zero cost. **(b) ⚠ SIGTERM freed the port but left the process alive for 35 s** — a script waiting on the port would have run two copies. **Kill by PID, wait on the PID, never on the port.** A freed port is not evidence of a dead process.
	# `[2026-09-15]` Two restart patterns from svos-dev worth stealing: (a) DRY-RUN BOOT against the still-held port

	⭐⭐ Two restart patterns from svos-dev worth stealing: (a) DRY-RUN BOOT against the still-held port — start the new process while the old one holds the socket; it proves every check above the bind and dies on `[Errno 98]`, so a one-way restart becomes a rehearsed one at zero cost. (b) ⚠ SIGTERM freed the port but left the process alive for 35 s — a script waiting on the port would have run two copies. Kill by PID, wait on the PID, never on the port. A freed port is not evidence of a dead process.