Fix BrokenPipeError

✅ Solution

BrokenPipeError in llamaindex pipelines with `num_workers > 0` usually stems from a worker process dying unexpectedly, often due to memory issues or unhandled exceptions causing the parent process to lose connection while still trying to send data. To fix, reduce `num_workers` to lower memory pressure, add robust error handling within the worker function to prevent crashes, or explicitly manage the lifecycle of worker processes by using a `try...except` block when interacting with them. Inspecting logs, specifically from the worker process helps identify the root cause of the process failure and helps to implement targeted fixes.