- Bump version to 25.0.2
- Update copyright year to 2026 in LICENSE and NOTICE
- Add license headers to all Python source files
- Add changelog entry for 25.0.2
- Fix nginx config to use keepalive with upstream (was sending
Connection: close which caused premature connection closure)
- Add _safe_write() to handle socket errors (EPIPE, ECONNRESET,
ENOTCONN) gracefully when client disconnects
- Fix ASGI scope server/client to always be 2-tuples for IPv6
compatibility (IPv6 sockets return 4-tuples)
- Add write_eof() before close() to ensure buffered data is flushed
- Bind to [::] for dual-stack IPv4/IPv6 support in test containers
Closes#3484
When a client disconnects during an ASGI request, the worker now:
1. Sends http.disconnect message to the app's receive queue
2. Allows a configurable grace period for cleanup (default: 3 seconds)
3. Only cancels the task after the grace period expires
This follows the ASGI HTTP Connection Scope spec which defines
http.disconnect as the message apps should receive when clients
disconnect: https://asgi.readthedocs.io/en/latest/specs/www.html#disconnect-receive-event
The grace period prevents CancelledError from propagating to async
database operations, allowing SQLAlchemy and other async DB libraries
to properly reset their connection pools.
New config option: --asgi-disconnect-grace-period (default: 3 seconds)
Closes#3482
The dirty module (which uses asyncio and concurrent.futures) was being
imported at gunicorn startup via gunicorn.arbiter. This caused
concurrent.futures to be imported before user code could call
gevent.monkey.patch_all(), breaking gevent's monkey-patching.
Changes:
- gunicorn/arbiter.py: Import DirtyArbiter and set_dirty_socket_path
lazily inside spawn_dirty_arbiter() instead of at module level
- gunicorn/dirty/worker.py: Import ThreadPoolExecutor lazily inside
run() method instead of at module level
- Add tests/workers/test_gevent_import_order.py with 5 tests verifying:
- concurrent.futures is NOT imported when gunicorn.arbiter loads
- gevent patching works correctly with gunicorn
- Reproduces the exact scenario from the bug report gist
This ensures gevent's monkey.patch_all() can run before concurrent.futures
is imported, allowing proper patching of threading primitives.
- Fix path expectation in test_scope_path_preserved (router strips /http prefix)
- Fix lifespan state check to use scope_state instead of module_state
- Add tolerance for partial failures in proxy concurrent test
- Add retry logic with proper assertions in HTTPS proxy FastAPI test
Add chunked transfer encoding support to the ASGI worker for HTTP/1.1
streaming responses that don't have a Content-Length header. This fixes
SSE (Server-Sent Events) connections not closing properly.
Without chunked encoding or Content-Length, HTTP/1.1 clients wait for
the connection to close to determine end-of-response, causing streaming
endpoints to hang.
Also updates the celery_alternative example to use FastAPI with the
native ASGI worker and uvloop, demonstrating async task execution with
proper SSE streaming.
- SIGINT/SIGQUIT triggers immediate shutdown, skipping connection waits
- SIGTERM triggers graceful shutdown, waiting for connections
- Arbiter forwards SIGQUIT to workers if received during graceful shutdown
- Workers have 2s to exit cleanly after quick shutdown before SIGKILL
- Add get_app_workers_attribute() to read workers class attribute
- Update _parse_app_specs() to check class attribute when no config override
- Add Docker-based e2e tests for per-app worker allocation
- Add test apps: HeavyModelApp (workers=2), LightweightApp
- Add unit tests for get_app_workers_attribute function
- Add integration tests for class attribute detection
Allow dirty apps to specify how many workers should load them, enabling
significant memory savings for heavy applications like ML models.
- Add `workers` class attribute to DirtyApp (None = all workers)
- Add `parse_dirty_app_spec()` to parse "module:Class:N" format
- Add `DirtyNoWorkersAvailableError` for app-specific error handling
- Update DirtyArbiter with per-app worker tracking and routing
- Maintain backward compatibility when no dirty_apps configured
Example: 8 workers x 10GB model = 80GB RAM needed
With workers=2: 2 x 10GB = 20GB RAM (75% savings)
Configuration formats:
- Class attribute: `workers = 2` on DirtyApp subclass
- Config format: `module:class:N` (e.g., `myapp.ml:HugeModel:2`)
- Fix mobile side menu not displaying on iPad by keeping site_nav
content but hiding sidebar on desktop via CSS
- Fix broken links in asgi.md and guides/http2.md
- Add HTTP/2 guide to navigation
- Add explicit do_handshake() in base_async.py before ALPN check
when do_handshake_on_connect is False
- Mark eventlet worker as deprecated (removal in 26.0)
- Add HTTP/2 gevent example with Docker and tests
- Update documentation to reflect eventlet deprecation
- Remove eventlet websocket example (gevent version exists)
The ALPN fix ensures HTTP/2 works correctly with gevent and eventlet
workers when do_handshake_on_connect config is False (the default).
Without explicit handshake, selected_alpn_protocol() returns None.
- Reorder exception handlers: specific exceptions before ProtocolError
- Extract _wait_for_flow_control_window() to reduce return statements
- Refactor flow control waiting to avoid too-many-return-statements
- Add three tuning profiles: Conservative, Balanced, High Concurrency
- Document pros/cons and trade-offs for each HTTP/2 setting
- Add Linux kernel tuning parameters for high concurrency
- Add Docker-specific tuning recommendations
- Include benchmark results from h2load testing
