🎨 improve investigate log streaming

services/api-server/src/simcore_service_api_server/api/dependencies/rabbitmq.py

@@ -18,8 +18,6 @@ def get_log_distributor(app: Annotated[FastAPI, Depends(get_app)]) -> LogDistrib
     return cast(LogDistributor, app.state.log_distributor)
 
 
-def get_max_log_check_seconds(
-    app: Annotated[FastAPI, Depends(get_app)]
-) -> NonNegativeInt:
+def get_log_check_timeout(app: Annotated[FastAPI, Depends(get_app)]) -> NonNegativeInt:
     assert app.state.settings  # nosec
-    return cast(NonNegativeInt, app.state.settings.API_SERVER_MAX_LOG_CHECK_SECONDS)
+    return cast(NonNegativeInt, app.state.settings.API_SERVER_LOG_CHECK_TIMEOUT_SECONDS)

services/api-server/src/simcore_service_api_server/api/routes/solvers_jobs_getters.py

@@ -6,7 +6,7 @@
 from typing import Annotated
 from uuid import UUID
 
-from fastapi import APIRouter, Depends, status
+from fastapi import APIRouter, Depends, Request, status
 from fastapi.exceptions import HTTPException
 from fastapi.responses import RedirectResponse
 from fastapi_pagination.api import create_page
@@ -17,6 +17,7 @@
 from models_library.users import UserID
 from pydantic import NonNegativeInt
 from pydantic.types import PositiveInt
+from servicelib.fastapi.requests_decorators import cancel_on_disconnect
 from servicelib.logging_utils import log_context
 from starlette.background import BackgroundTask
 
@@ -35,7 +36,7 @@
 from ..dependencies.application import get_reverse_url_mapper
 from ..dependencies.authentication import get_current_user_id, get_product_name
 from ..dependencies.database import Engine, get_db_engine
-from ..dependencies.rabbitmq import get_log_distributor, get_max_log_check_seconds
+from ..dependencies.rabbitmq import get_log_check_timeout, get_log_distributor
 from ..dependencies.services import get_api_client
 from ..dependencies.webserver import AuthSession, get_webserver_session
 from ..errors.custom_errors import InsufficientCredits, MissingWallet
@@ -380,17 +381,17 @@ async def get_job_pricing_unit(
     response_class=LogStreamingResponse,
     include_in_schema=API_SERVER_DEV_FEATURES_ENABLED,
 )
+@cancel_on_disconnect
 async def get_log_stream(
+    request: Request,
     solver_key: SolverKeyId,
     version: VersionStr,
     job_id: JobID,
     webserver_api: Annotated[AuthSession, Depends(get_webserver_session)],
     director2_api: Annotated[DirectorV2Api, Depends(get_api_client(DirectorV2Api))],
     log_distributor: Annotated[LogDistributor, Depends(get_log_distributor)],
     user_id: Annotated[UserID, Depends(get_current_user_id)],
-    max_log_check_seconds: Annotated[
-        NonNegativeInt, Depends(get_max_log_check_seconds)
-    ],
+    log_check_timeout: Annotated[NonNegativeInt, Depends(get_log_check_timeout)],
 ):
     job_name = _compose_job_resource_name(solver_key, version, job_id)
     with log_context(
@@ -403,7 +404,7 @@ async def get_log_stream(
             director2_api=director2_api,
             job_id=job_id,
             log_distributor=log_distributor,
-            max_log_check_seconds=max_log_check_seconds,
+            log_check_timeout=log_check_timeout,
         )
         await log_streamer.setup()
         return LogStreamingResponse(

services/api-server/src/simcore_service_api_server/core/settings.py

@@ -137,7 +137,7 @@ class ApplicationSettings(BasicSettings):
     API_SERVER_DIRECTOR_V2: DirectorV2Settings | None = Field(
         auto_default_from_env=True
     )
-    API_SERVER_MAX_LOG_CHECK_SECONDS: NonNegativeInt = 30
+    API_SERVER_LOG_CHECK_TIMEOUT_SECONDS: NonNegativeInt = 3 * 60
     API_SERVER_PROMETHEUS_INSTRUMENTATION_ENABLED: bool = True
     # DEV-TOOLS
     API_SERVER_DEV_HTTP_CALLS_LOGS_PATH: Path | None = Field(

services/api-server/src/simcore_service_api_server/services/log_streaming.py

@@ -1,7 +1,6 @@
 import asyncio
 import logging
 from asyncio import Queue
-from datetime import datetime, timezone
 from typing import AsyncIterable, Awaitable, Callable, Final
 
 from models_library.rabbitmq_messages import LoggerRabbitMessage
@@ -110,15 +109,15 @@ def __init__(
         director2_api: DirectorV2Api,
         job_id: JobID,
         log_distributor: LogDistributor,
-        max_log_check_seconds: NonNegativeInt,
+        log_check_timeout: NonNegativeInt,
     ):
         self._user_id = user_id
         self._director2_api = director2_api
         self._queue: Queue[JobLog] = Queue()
         self._job_id: JobID = job_id
         self._log_distributor: LogDistributor = log_distributor
         self._is_registered: bool = False
-        self._max_log_check_seconds: NonNegativeInt = max_log_check_seconds
+        self._log_check_timeout: NonNegativeInt = log_check_timeout
 
     async def setup(self):
         await self._log_distributor.register(self._job_id, self._queue.put)
@@ -137,26 +136,19 @@ async def __aexit__(self, exc_type, exc, tb):
 
     async def _project_done(self) -> bool:
         task = await self._director2_api.get_computation(self._job_id, self._user_id)
-        return not task.stopped is None
+        return task.stopped is not None
 
     async def log_generator(self) -> AsyncIterable[str]:
         if not self._is_registered:
             raise LogStreamerNotRegistered(
                 f"LogStreamer for job_id={self._job_id} is not correctly registered"
             )
-        last_log_time: datetime | None = None
-        while True:
-            while self._queue.empty():
-                if await self._project_done():
-                    return
-                await asyncio.sleep(
-                    0.2
-                    if last_log_time is None
-                    else min(
-                        (datetime.now(tz=timezone.utc) - last_log_time).total_seconds(),
-                        self._max_log_check_seconds,
-                    )
+        done: bool = False
+        while not done:
+            try:
+                log: JobLog = await asyncio.wait_for(
+                    self._queue.get(), timeout=self._log_check_timeout
                 )
-            log: JobLog = await self._queue.get()
-            last_log_time = datetime.now(tz=timezone.utc)
-            yield log.json() + _NEW_LINE
+                yield log.json() + _NEW_LINE
+            except asyncio.TimeoutError:
+                done = await self._project_done()

services/api-server/tests/unit/api_solvers/test_api_routers_solvers_jobs_logs.py

@@ -87,6 +87,7 @@ def fake_project_for_streaming(
     yield fake_project
 
 
+@pytest.mark.parametrize("disconnect", [True, False])
 async def test_log_streaming(
     app: FastAPI,
     auth: httpx.BasicAuth,
@@ -96,6 +97,7 @@ async def test_log_streaming(
     fake_log_distributor,
     fake_project_for_streaming: ProjectGet,
     mocked_directorv2_service: MockRouter,
+    disconnect: bool,
 ):
 
     job_id: JobID = fake_project_for_streaming.uuid
@@ -107,10 +109,13 @@ async def test_log_streaming(
         auth=auth,
     ) as response:
         response.raise_for_status()
-        async for line in response.aiter_lines():
-            job_log = JobLog.parse_raw(line)
-            pprint(job_log.json())
-            collected_messages += job_log.messages
+        if not disconnect:
+            async for line in response.aiter_lines():
+                job_log = JobLog.parse_raw(line)
+                pprint(job_log.json())
+                collected_messages += job_log.messages
+
+    assert fake_log_distributor.deregister_is_called
 
     assert (
         collected_messages

services/api-server/tests/unit/test_services_rabbitmq.py

@@ -348,7 +348,7 @@ def _get_computation(request: httpx.Request, **kwargs) -> httpx.Response:
         director2_api=d2_client,
         job_id=project_id,
         log_distributor=log_distributor,
-        max_log_check_seconds=1,
+        log_check_timeout=1,
     ) as log_streamer:
         yield log_streamer
 
@@ -393,7 +393,7 @@ async def test_log_generator(mocker: MockFixture, faker: Faker):
         "simcore_service_api_server.services.log_streaming.LogStreamer._project_done",
         return_value=True,
     )
-    log_streamer = LogStreamer(user_id=3, director2_api=None, job_id=None, log_distributor=None, max_log_check_seconds=1)  # type: ignore
+    log_streamer = LogStreamer(user_id=3, director2_api=None, job_id=None, log_distributor=None, log_check_timeout=1)  # type: ignore
     log_streamer._is_registered = True
 
     published_logs: list[str] = []
@@ -414,7 +414,7 @@ async def test_log_generator(mocker: MockFixture, faker: Faker):
 
 
 async def test_log_generator_context(mocker: MockFixture, faker: Faker):
-    log_streamer = LogStreamer(user_id=3, director2_api=None, job_id=None, log_distributor=None, max_log_check_seconds=1)  # type: ignore
+    log_streamer = LogStreamer(user_id=3, director2_api=None, job_id=None, log_distributor=None, log_check_timeout=1)  # type: ignore
     with pytest.raises(LogStreamerNotRegistered):
         async for log in log_streamer.log_generator():
             print(log)