Mitsuhiro Kotake 44ab72674e Close MCP stderr readers on client teardown (#43870) ...

## Why

A descendant outside an MCP server's process group can keep stderr open after the server exits, leaving the reader task and its file descriptor alive.

## What changed

Signal the local stderr reader during explicit shutdown and when the process handle is dropped. Allow up to 250 ms to drain queued diagnostics before closing the reader, even if stderr never reaches EOF.

## Testing

Add a Unix regression test covering explicit shutdown and client drop with a descendant that keeps stderr open. Verify that file descriptor counts return to baseline while the descendant remains alive and that queued diagnostics are logged.

GitOrigin-RevId: 1b544e8dba2b5616db6739d075e7232564c92884

2026-09-08 17:42:14 +00:00

..

foreign_stdio_cwd.rs

mcp: accept foreign absolute cwd for remote stdio (#29493)

2026-06-23 01:33:51 +00:00

mcp_2026_discovery.rs

Update rmcp to 3.1.3 (#39798)

2026-08-20 20:53:17 +00:00

mcp_2026_message_limits.rs

Complete MCP 2026 client support (#35725)

2026-07-28 06:06:58 +00:00

mcp_2026_mrtr.rs

Update rmcp to 3.1.2 (#39101)

2026-08-17 23:04:09 +00:00

mcp_2026_oauth_discovery.rs

Harden MCP OAuth callback handling (#40691)

2026-08-25 20:26:23 +00:00

mcp_2026_sse_discovery.rs

Add MCP 2026-07-28 discovery support (#35724)

2026-07-28 05:52:12 +00:00

mcp_2026_stdio_discovery.rs

Propagate custom CA settings to local MCP servers (#38040)

2026-08-11 17:24:04 +00:00

mcp_2026_stdio.rs

Fix relative MCP server spawning on macOS (#42117)

2026-09-01 18:53:06 +00:00

mcp_events.rs

Add MCP event discovery and subscriptions (#37494)

2026-08-07 19:36:52 +00:00

process_group_cleanup.rs

Fix relative MCP server spawning on macOS (#42117)

2026-09-01 18:53:06 +00:00

resources.rs

Improve sandboxing, MCP errors, and cached approvals (#41196)

2026-08-27 20:05:08 +00:00

stdio_message_limits.rs

Harden local MCP server process tree cleanup (#37366)

2026-08-07 03:34:49 +00:00

stdio_stderr_cleanup.rs

Close MCP stderr readers on client teardown (#43870)

2026-09-08 17:42:14 +00:00

streamable_http_oauth_startup.rs

Preserve MCP authentication challenges on tool calls (#42552)

2026-09-03 15:12:02 +00:00

streamable_http_oauth_store_pinning.rs

Enable coordinated MCP OAuth refresh (#42413)

2026-09-03 02:00:12 +00:00

streamable_http_recovery.rs

Preserve MCP authentication challenges on tool calls (#42552)

2026-09-03 15:12:02 +00:00

streamable_http_remote.rs

Cache executor metadata from initialization (#40343)

2026-08-24 06:43:07 +00:00

streamable_http_test_support.rs

Avoid port races in streamable HTTP tests (#42767)

2026-09-04 13:35:41 +00:00

streamable_http_user_agent.rs

Set a default user agent for MCP HTTP requests (#34883)

2026-07-23 06:13:12 +00:00