Activity throws error `tsync_worker_receive_frame: EOF` in Docker setup

cristianocz
Mon, 24 Nov 2025 20:01:56 +0000
Community Support

I recently experimented converting high workload queued jobs to Temporal workflows and activities.

One in particular involves processing very large CSV files by splitting them in multiple activities.

The issue I have on my end is that the activity eventually re-attempts but I am unsure what the issue could be.

I have posted the error below but if my colleague runs the exact same code the file processed correctly with all the activities never retrying in the first place.

Same amount of workers (1) and num_workers: 10 in .rr.yaml.

We both run the same Docker setup using docker compose which describes the containers necessary to run the application.

Has anyone hit a similar issue? Seems like something to do with my setup, any help would be very much appreciated.

2025-11-24T19:45:46+0000	ERROR	temporal    	Activity error.	{“Namespace”: “default”, “TaskQueue”: “import_create_contacts”, “WorkerID”: “roadrunner:import_create_contacts:4cd9cfb3-050f-4eb4-ba4d-1d791423b919”, “WorkflowID”: “import-contacts-14-1764013389”, “RunID”: “019ab764-366b-7651-9493-0626a82d7dd7”, “ActivityType”: “ProcessCSVChunk”, “Attempt”: 1, “Error”: “activity_pool_execute_activity: Network:\n\tsync_worker_receive_frame: EOF”}

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