John Spray 7eaa7a496b pageserver: cancellation handling in writes to postgres client socket (#5503) ...

## Problem

Writes to the postgres client socket from the page server were not
wrapped in cancellation handling, so a stuck client connection could
prevent tenant shutdowwn.

## Summary of changes

All the places we call flush() to write to the socket, we should be
respecting the cancellation token for the task.

In this PR, I explicitly pass around a CancellationToken rather than
doing inline `task_mgr::shutdown_token` calls, to avoid coupling it to
the global task_mgr state and make it easier to refactor later.

I have some follow-on commits that add a Shutdown variant to QueryError
and use it more extensively, but that's pure refactor so will keep
separate from this bug fix PR.

Closes: https://github.com/neondatabase/neon/issues/5341

2023-10-09 15:54:17 +01:00

..

src

pageserver: cancellation handling in writes to postgres client socket (#5503)

2023-10-09 15:54:17 +01:00

tests

Make postgres_backend use generic IO type (#3789)

2023-03-13 12:18:10 +03:00

Cargo.toml

Remove sync postgres_backend, tidy up its split usage.

2023-03-09 20:45:56 +03:00