[WORKFLOW SDK BUG] Activity concurrency is throttled too much
Nadie ha tomado este issue todavía.
Evaluación
- Dificultad
- 4/5
- Tiempo estimado
- 3-5 días
- Aptitud para principiantes
- 50/100
- Tipo de issue
- Error
- Claridad
- Bastante claro
- Estado de actividad
- Tranquilo
- Stack tecnológico
- python
- Área
- backend, distributed-systems
Línea de trabajo
Reproduce el problema con un workflow que distribuya 100 activities, cada una con una espera de 60 segundos, y compara las marcas de tiempo de programación y activación en los logs. Rastrea la ruta de programación y activación de activities del Python workflow SDK. Se considera terminado cuando la distribución no impone el límite observado de 10–15 activities y las activities pueden ejecutarse simultáneamente como se espera.
Escrito por el modelo de indexación a partir del texto del issue.
Descripción
runtime
1.17.rc2
SDK
dapr>=1.17.0rc2
dapr-ext-workflow>=1.17.0rc2
Expected Behavior
Activities are allowed to run concurrently
Actual Behavior
The SDK is throttling how many activities can be ran at any one point time
Steps to Reproduce the Problem
Create a workflow, fan out 100 instances of Activities, have each activity sleep for 60 seconds before completing.
Look at the logs and notice that there are at most 10-15 activities running at the same time. Despite all Activities being scheduled at the same time, Activities won't Activate untill previous activities have finished.
Look at the timestamps in the logs below
note : When comparing this exact same workflow authored in dotnet, dotnet allows all activities to run concurrently.
2026-01-27 12:49:47
2026-01-27 12:49:47,810 - hello_world_app.workflows.fan_out_workflow - INFO - Starting fan-out workflow with 100 iterations
2026-01-27 12:49:47
2026-01-27 12:49:47.812 durabletask-worker INFO: 0-312: Orchestrator yielded with 100 task(s) and 0 event(s) outstanding.
2026-01-27 12:49:47
2026-01-27 12:49:47,812 - hello_world_app.workflows.fan_out_workflow - INFO - Waiting for 100 activities to complete
2026-01-27 12:49:47
2026-01-27 12:49:47,812 - durabletask-worker - INFO - 0-312: Orchestrator yielded with 100 task(s) and 0 event(s) outstanding.
2026-01-27 12:49:47
2026-01-27 12:49:47,824 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #0 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,826 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #1 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,826 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #2 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,828 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #3 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,829 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #4 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,833 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #5 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,835 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #6 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,846 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #7 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,855 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #8 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,865 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #9 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,866 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #10 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,869 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #11 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,870 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #12 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
2026-01-27 12:49:47,872 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #13 - scheduled=12:49:47 activated=12:49:47
2026-01-27 12:49:47
INFO: 172.20.0.11:53174 - "POST /fanout-workflow HTTP/1.1" 200 OK
2026-01-27 12:50:47
2026-01-27 12:50:47,827 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #0 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,831 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #1 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,832 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #3 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,832 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #2 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,833 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #4 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,834 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #5 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,836 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #6 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,845 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #14 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,845 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #15 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,846 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #16 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,847 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #17 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,847 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #18 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,848 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #19 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,849 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #7 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,850 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #20 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,852 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #21 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,857 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #8 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,859 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #22 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,867 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #9 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,868 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #10 - scheduled=12:49:47 activated=12:49:47 finished=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,870 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #23 - scheduled=12:49:47 activated=12:50:47
2026-01-27 12:50:47
2026-01-27 12:50:47,870 - hello_world_app.activities.super_slow_activity - INFO - 0-312 - super_slow_activity (1) #24 - scheduled=12:49:47 activated=12:50:47
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