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Starts all queue runners collected in the graph. (deprecated)

This is a companion method to add_queue_runner(). It just starts threads for all queue runners collected in the graph. It returns the list of all threads.

sess Session used to run the queue ops. Defaults to the default session.
coord Optional Coordinator for coordinating the started threads.
daemon Whether the threads should be marked as daemons, meaning they don't block program exit.
start Set to False to only create the threads, not start them.
collection A GraphKey specifying the graph collection to get the queue runners from. Defaults to GraphKeys.QUEUE_RUNNERS.

ValueError if sess is None and there isn't any default session.
TypeError if sess is not a tf.compat.v1.Session object.

A list of threads.

RuntimeError If called with eager execution enabled.
ValueError If called without a default tf.compat.v1.Session registered.

Eager Compatibility

Not compatible with eager execution. To ingest data under eager execution, use the API instead.