flink-python/pyflink/fn_execution/pickle.py

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from threading import RLock

import cloudpickle

_lock = RLock()


def loads(payload):
    with _lock:
        # there is race condition for pickle.load() used in multi-thread environment,
        # see https://bugs.python.org/issue36773 for more details.
        return cloudpickle.loads(payload)