Eric Traut 92fb848065 Allow large remote app-server resume responses (#19920) ...

## Why

Remote TUI resume uses the app-server websocket client. That client
inherited tungstenite's default `16 MiB` frame limit, so a large saved
session could make `thread/resume` return a single JSON-RPC response
frame that the client rejected before the TUI could deserialize or
render it.

Fixes #19837

## What Changed

- Configure the remote app-server websocket client with a bounded `128
MiB` max frame/message size.
- Preserve the concrete remote worker exit reason when completing
pending requests after a transport/read failure instead of replacing it
with a generic channel-closed error.
- Add a regression test that sends a single `>16 MiB` JSON-RPC response
frame and verifies the typed request succeeds.

Note: This isn't a perfect fix. It really just moves the limit to a much
larger value. I looked at a bunch of other potential fixes (both
server-side and client-side), and they all involved significant
complexity, had backward-compatibility impact, or impacted performance
of common use cases. This simple fix should address the vast majority of
remote use cases.

## Verification

I reproed the problem locally using a long rollout. Verified that fix
addresses connection drop.

92fb848065 · 2026-04-27 22:44:10 -07:00

History

..

lib.rs

Allow large remote app-server resume responses (#19920)

2026-04-27 22:44:10 -07:00

remote.rs

Allow large remote app-server resume responses (#19920)

2026-04-27 22:44:10 -07:00