client: don't hang indefinitive when the connection break #153
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When the connection closes all client task should terminate. But following example would hang even when the broker closes the connection:
The problem lies in the task.set_exception(). It should terminate all pending task. But the problem is Tasks doesn't support set_exception() and this call raise itself an exception.
As the docs state:
"asyncio.Task inherits from Future all of its APIs except Future.set_result() and Future.set_exception()."
However after implementing it. message will return None without any exception.