Nothing bounded shutdown, and a module that failed to start was never cleaned up.
`startModules` appended to its rollback set only after `start()` resolved, so a
hook that acquired a connection, registered a listener, or recorded partial
initialization and then threw had its own `stop()` skipped, while every
previously completed module was rolled back correctly. A module now joins the
rollback set the moment its start hook is invoked: its own stop hook runs first,
then earlier modules in reverse order. The original start issue stays first in
the reported issues, and a failure stopping the failing module is appended
without preventing the rest of the rollback. The consequence for module authors
is explicit and documented — `stop()` may run after a partially completed
`start()` and must be safe and idempotent about resources it may or may not
hold.
Neither stage of shutdown had a deadline. `shutdown()` awaited `server.close()`
with no bound, so one open connection could hold it forever, and each stop or
rollback hook was awaited without a bound, so a hook that never settled kept the
pool open indefinitely. Both now have fixed, non-configurable defaults: 10
seconds per module hook and 30 seconds for the graceful HTTP drain. A hook that
reaches its deadline records MODULE_STOP_TIMEOUT or MODULE_ROLLBACK_TIMEOUT and
the sequence continues with the next module, so the whole stop sequence is
finite in the started module count rather than one global ten-second bound.
Timers that lose the race are cleared, the losing promise gets a permanent
rejection handler so a late throw cannot become an unhandled rejection, and a
timed-out hook is never awaited again.
At the drain deadline the platform closes idle and then active connections
through Node's own public closeIdleConnections/closeAllConnections, after
server.close(), touching no private field, and stops waiting for the close
callback. It then runs the bounded module stop sequence and closes the pool, so
a drain timeout or a stop failure never skips later cleanup. Both are reported
together as an ApiShutdownError carrying only fixed booleans and the already
sanitized module error; a forced drain is a shutdown failure, not a success.
Stated honestly rather than overstated: a deadline bounds how long the platform
waits, not how long module code runs. An in-process promise cannot be canceled,
and closing a socket does not prove a handler promise ended. What is guaranteed
is that shutdown stops waiting and the pool closes afterwards, so late database
work fails.
Co-Authored-By: Claude Opus 5 <[email protected]>
