when multiprocessing in a tool, and start mcp client by STDIO, the mcp server never response. To Reproduce Steps to reproduce the behavior: write mcp server: ## test_mcp.py from mcp.server.fastmcp ...

RuntimeError: One of the subprocesses has abruptly died during map operation.To debug the error, disable multiprocessing. 2025-05-27 07:34:04 | INFO | data_juicer.utils.logger_utils:230 - Processing ...