BUG FIX: daemonic processes are not allowed to have children #135
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Error:
PDF file used in Marker: crowd.pdf from benchmark dataset
Reason:
In Python, a daemon process cannot have child processes. The ProcessPoolExecutor is likely being used in a context where its parent process is a daemon.
Fix:
To fix this, ensure that the parent process is not a daemon or refactor the code to use ThreadPoolExecutor instead if parallelism is needed and I/O-bound tasks dominate the workload. For CPU-bound tasks, you might need to avoid creating processes within daemon threads.