pyspark流无法使用广播变量从检查点恢复

我创建了一个pyspark流媒体，它有检查点和广播变量。首次启动成功，但当我希望它从检查点恢复时，它出现了一些错误：

Caused by: org.apache.spark.SparkException: An exception was raised by Python:
Traceback (most recent call last):
  File "/usr/local/python3/lib/python3.5/site-packages/pyspark/streaming/util.py", line 123, in loads
    f, wrap_func, deserializers = self.serializer.loads(bytes(data))
  File "/usr/local/python3/lib/python3.5/site-packages/pyspark/serializers.py", line 580, in loads
    return pickle.loads(obj, encoding=encoding)
  File "/usr/local/python3/lib/python3.5/site-packages/pyspark/broadcast.py", line 46, in _from_id
    raise Exception("Broadcast variable '%s' not loaded!" % bid)
Exception: Broadcast variable '1' not loaded!

在官方文件中，它说您必须创建延迟实例化的单例实例，我创建了一个方法：

    def get_broadcast_tables(self, table: str):
        if table not in globals():
            globals()[table] = self.sc.broadcast(table)
        return globals()[table]

我将它与

bc=self.get\u broadcast\u tables（“我的表”）

一起使用，但它仍然出错，我该如何处理它

我的spark版本是2.4.3和python版本3.5