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@ -125,6 +125,10 @@ class RetryDestinationLimiter(object):
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def __exit__(self, exc_type, exc_val, exc_tb):
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def __exit__(self, exc_type, exc_val, exc_tb):
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valid_err_code = False
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valid_err_code = False
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if exc_type is not None and issubclass(exc_type, CodeMessageException):
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if exc_type is not None and issubclass(exc_type, CodeMessageException):
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# Some error codes are perfectly fine for some APIs, whereas other
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# APIs may expect to never received e.g. a 404. It's important to
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# handle 404 as some remote servers will return a 404 when the HS
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# has been decommissioned.
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if exc_val.code < 400:
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if exc_val.code < 400:
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valid_err_code = True
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valid_err_code = True
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elif exc_val.code == 404 and self.backoff_on_404:
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elif exc_val.code == 404 and self.backoff_on_404:
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