Answer
PID 1 does not forward signals properly; using tini or an init wrapper is recommended.
Quick Answer
PID 1 is the init process — it must handle signals properly and reap zombie child processes. In Docker, your app IS PID 1. Many apps aren't written to handle SIGTERM correctly as PID 1, causing containers to ignore graceful shutdown signals. Solutions: use ENTRYPOINT exec form, or prepend your command with tini (a minimal init).
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ