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Naman Trivedi
0700e749eb
When OutgoingMessage transitions from pre-socket buffering (Path B) to socket-connected writing (Path A), the backpressure domain changes — subsequent writes go directly to the socket, which enforces its own backpressure via socket.write() return values. The OM should emit drain at this transition point to signal that its buffer is clear and the caller can resume writing under the socket backpressure regime. Previously, _flush() gated drain emission on writableLength === 0 which included socket.writableLength. This conflated two independent backpressure domains: the OM pre-socket buffer and the socket kernel write queue. When the socket had a higher writableHighWaterMark than the OM (e.g. agent-reused socket from a prior request), the socket was never backpressured and never emitted drain, causing a permanent deadlock. Additionally, avoid reusing a pooled socket in http.Agent when its writableHighWaterMark differs from the request highWaterMark, so that the user backpressure threshold is respected for the common case of the built-in Agent. Signed-off-by: Naman Trivedi <trivenay@amazon.com> Fixes: https://github.com/nodejs/node/issues/64680 Refs: https://github.com/nodejs/node/pull/64653 Refs: https://github.com/nodejs/node/pull/62936 PR-URL: https://github.com/nodejs/node/pull/64991 Reviewed-By: Robert Nagy <ronagy@icloud.com> Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Gürgün Dayıoğlu <hey@gurgun.day>
Node.js Core Tests
This directory contains code and data used to test the Node.js implementation.
For a detailed guide on how to write tests in this directory, see the guide on writing tests.
On how to run tests in this directory, see the contributing guide.
For the tests to run on Windows, be sure to clone Node.js source code with the
autocrlf git config flag set to true.
Test Directories
| Directory | Runs on CI | Purpose |
|---|---|---|
abort |
Yes | Tests that use --abort-on-uncaught-exception and other cases where we want to avoid generating a core file. |
addons |
Yes | Tests for addon functionality along with some tests that require an addon. |
async-hooks |
Yes | Tests for async_hooks functionality. |
benchmark |
Yes | Test minimal functionality of benchmarks. |
cctest |
Yes | C++ tests that are run as part of the build process. |
code-cache |
No | Tests for a Node.js binary compiled with V8 code cache. |
common |
N/A | Common modules shared among many tests.1 |
doctool |
Yes | Tests for the documentation generator. |
es-module |
Yes | Test ESM module loading. |
fixtures |
N/A | Test fixtures used in various tests throughout the test suite. |
internet |
No | Tests that make real outbound network connections.2 |
js-native-api |
Yes | Tests for Node.js-agnostic Node-API functionality. |
known_issues |
Yes | Tests reproducing known issues within the system.3 |
message |
Yes | Tests for messages that are output for various conditions |
node-api |
Yes | Tests for Node.js-specific Node-API functionality. |
parallel |
Yes | Various tests that are able to be run in parallel. |
pseudo-tty |
Yes | Tests that require stdin/stdout/stderr to be a TTY. |
pummel |
No | Various tests for various modules / system functionality operating under load. |
sequential |
Yes | Various tests that must not run in parallel. |
testpy |
N/A | Test configuration utility used by various test suites. |
tick-processor |
No | Tests for the V8 tick processor integration.4 |
v8-updates |
No | Tests for V8 performance integration. |
-
Tests for networking related modules may also be present in other directories, but those tests do not make outbound connections. ↩︎
-
All tests inside of this directory are expected to fail. If a test doesn't fail on certain platforms, those should be skipped via
known_issues.status. ↩︎ -
The tests are for the logic in
lib/internal/main/prof_process.jsandlib/internal/v8_prof_polyfill.js. The tests confirm that the profile processor packages the correct set of scripts from V8 and introduces the correct platform specific logic. ↩︎