Hacktoberfest 2026: as issues que os mantenedores marcaram para outubro, abertas e boas para iniciantes. Ver issues do Hacktoberfest

Proposal: handle SIGTERM by default to initiate graceful worker shutdown

Aberta
  • Algo errado?
#1,948 0 comentários 0 reações 1 responsável Ver no GitHub

Mantenedores costumam responder em até 1 dia

@eamsden já está trabalhando nisso.

Desde 8/10/2026.

Avaliação

Esta issue ainda não foi avaliada.

Descrição

Summary

A Temporal Python worker installs no OS signal handler by default, so when the process receives SIGTERM (Kubernetes pod stop, Cloud Run scale-down/redeploy, docker stop, systemd), the OS default disposition applies and the process is terminated immediately — before the worker can stop polling or drain in-flight work. In-flight activities are abandoned and retried server-side after their timeouts. (Python installs a handler for SIGINT but deliberately leaves SIGTERM at the OS default.)

Proposal: consider initiating the worker's existing graceful-shutdown path on SIGTERM by default (opt-out-able), so the common containerized case — stop polling → drain for graceful_shutdown_timeout → cancel — works without extra wiring.

Current workaround

loop.add_signal_handler(signal.SIGTERM, ...) to trigger await worker.shutdown() (or to exit an async with worker: block).

Precedent

The TypeScript SDK already does this: its Runtime installs handlers for SIGINT/SIGTERM/SIGQUIT/SIGUSR2 by default and calls shutdown() on every worker.

Trade-offs / open questions (why it is not already the default)

  • A worker usually runs inside a larger process (HTTP server, DI host, other lifecycle). A library installing a process-global signal handler can conflict with the host application's own signal handling, so any default must be clearly opt-out-able and should no-op when a host framework already owns the signal.
  • Default-on vs. an explicit opt-in flag?
  • If added, match the TypeScript semantics and honor the existing grace/drain config.

Why this comes up

SIGTERM-before-SIGKILL is the standard stop protocol for Kubernetes, Cloud Run, ECS, docker stop, and systemd. Users commonly expect a worker to drain on SIGTERM without extra wiring, and it is a recurring support question (e.g. https://community.temporal.io/t/proper-way-to-shutdown-on-sigterm-sigint/5485).

One of a set of sibling issues on default SIGTERM handling across the SDKs that do not auto-handle it today (Go, Python, Java, .NET, Ruby, Rust). TypeScript already does; PHP delegates process lifecycle to RoadRunner.

Linguagem predominante
Python
Estrelas
1.2k
Forks
269
Merge médio
1d 11h
PRs com merge (30d)
64

Preparar o ambiente

Primeiros passos

  1. Leia a issue inteira e depois o guia de contribuição do projeto.
  2. Comente na issue dizendo que vai assumir — evita que duas pessoas façam o mesmo trabalho.
  3. Faça um fork do repositório e trabalhe em uma branch.
  4. Abra um pull request que referencie o número da issue.

Mais de temporalio/sdk-python

Todas as issues de temporalio/sdk-python

Issues semelhantes

Mais issues de Python

Receba novas issues na sua caixa de entrada

Um resumo curto de issues do GitHub para quem está começando.