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[Python.Azure] LRO delete failed with exception

See original GitHub issue

I was using a LRO delete method from Azure Python SDK for IoT Hub. An exception was thrown when polling the status of the operation status. Not sure whether this error is related to Azure Python SDK or msrest. Could someone help take a look? Thanks!

Also I have a question regarding what is the correct behavior of LRO delete method. After the resource is deleted completely, the status link will return 404 (in the case of IoT Hub). But looks like 404 is not handled right now.

Paste msrest logging as below for your reference. I’ve removed subscription related information. BTW, I am using msrestazure-0.4.4, but the version is not updated in the package. So the agent info is showing msrest_azure/0.4.3.

msrest.pipeline : Configuring request: timeout=100, verify=True, cert=None
msrest.pipeline : Configuring redirects: allow=True, max=30
msrest.pipeline : Configuring proxies: ''
msrest.pipeline : Evaluate proxies against ENV settings: True
msrest.pipeline : Configuring retry: max_retries=3, backoff_factor=0.8, max_backoff=90
msrest.http_logger : Request URL: 'https://management.azure.com/subscriptions/xxxxxxxxxx/resourceGroups/iot-sample-kevinzha/providers/Microsoft.Devices/IotHubs/kevinzha-iot-hub?api-version=2016-02-03'
msrest.http_logger : Request method: 'DELETE'
msrest.http_logger : Request headers:
msrest.http_logger :     'Connection': 'keep-alive'
msrest.http_logger :     'Accept-Encoding': 'gzip, deflate'
msrest.http_logger :     'Accept': 'application/json'
msrest.http_logger :     'User-Agent': 'python/3.5.0 (Windows-10.0.14393) requests/2.11.1 msrest/0.4.4 msrest_azure/0.4.3 iothubclient/0.1.0 Azure-SDK-For-Python AZURECLI/0.1.0b7'
msrest.http_logger :     'Authorization': 'Bearer xxxxxxxxxx'
msrest.http_logger :     'CommandName': 'iot hub delete'
msrest.http_logger :     'x-ms-client-request-id': 'xxxxxxxxxx'
msrest.http_logger :     'Content-Type': 'application/json; charset=utf-8'
msrest.http_logger :     'accept-language': 'en-US'
msrest.http_logger :     'Content-Length': '0'
msrest.http_logger : Request body:
msrest.http_logger : None
requests.packages.urllib3.connectionpool : "DELETE /subscriptions/xxxxxxxxxx/resourceGroups/iot-sample-kevinzha/providers/Microsoft.Devices/IotHubs/kevinzha-iot-hub?api-version=2016-02-03 HTTP/1.1" 202 4
msrest.pipeline : Received status: 202 for method 'DELETE'
msrest.pipeline : Is forced retry: False
msrest.http_logger : Response status: 202
msrest.http_logger : Response headers:
msrest.http_logger :     'Cache-Control': 'no-cache'
msrest.http_logger :     'Pragma': 'no-cache'
msrest.http_logger :     'Content-Length': '4'
msrest.http_logger :     'Content-Type': 'application/json; charset=utf-8'
msrest.http_logger :     'Expires': '-1'
msrest.http_logger :     'Location': 'https://management.azure.com/subscriptions/xxxxxxxxxx/resourceGroups/iot-sample-kevinzha/providers/Microsoft.Devices/IotHubs/kevinzha-iot-hub/operationResults/NWM2MDU1NzMtNzMxOS00ODc5LTk0NWYtYTIyYzU2MTg5Mzcz?api-version=2016-02-03'
msrest.http_logger :     'Retry-After': '15'
msrest.http_logger :     'Azure-AsyncOperation': 'https://management.azure.com/subscriptions/xxxxxxxxxx/resourceGroups/iot-sample-kevinzha/providers/Microsoft.Devices/IotHubs/kevinzha-iot-hub/operationResults/NWM2MDU1NzMtNzMxOS00ODc5LTk0NWYtYTIyYzU2MTg5Mzcz?api-version=2016-02-03&asyncinfo'
msrest.http_logger :     'Server': 'Microsoft-HTTPAPI/2.0'
msrest.http_logger :     'x-ms-ratelimit-remaining-subscription-writes': '1198'
msrest.http_logger :     'x-ms-request-id': 'xxxxxxxxxx'
msrest.http_logger :     'x-ms-correlation-request-id': 'xxxxxxxxxx'
msrest.http_logger :     'x-ms-routing-request-id': 'JAPANEAST:20161024T024101Z:xxxxxxxxxx'
msrest.http_logger :     'Strict-Transport-Security': 'max-age=31536000; includeSubDomains'
msrest.http_logger :     'Date': 'Mon, 24 Oct 2016 02:41:01 GMT'
msrest.http_logger : Response content:
msrest.http_logger : b'null'
...
msrest.pipeline : Configuring request: timeout=100, verify=True, cert=None
msrest.pipeline : Configuring redirects: allow=True, max=30
msrest.pipeline : Configuring proxies: ''
msrest.pipeline : Evaluate proxies against ENV settings: True
msrest.pipeline : Configuring retry: max_retries=3, backoff_factor=0.8, max_backoff=90
msrest.http_logger : Request URL: 'https://management.azure.com/subscriptions/xxxxxxxxxx/resourceGroups/iot-sample-kevinzha/providers/Microsoft.Devices/IotHubs/kevinzha-iot-hub/operationResults/NWM2MDU1NzMtNzMxOS00ODc5LTk0NWYtYTIyYzU2MTg5Mzcz?api-version=2016-02-03&asyncinfo'
msrest.http_logger : Request method: 'GET'
msrest.http_logger : Request headers:
msrest.http_logger :     'Connection': 'keep-alive'
msrest.http_logger :     'Accept-Encoding': 'gzip, deflate'
msrest.http_logger :     'Accept': 'application/json'
msrest.http_logger :     'User-Agent': 'python/3.5.0 (Windows-10.0.14393) requests/2.11.1 msrest/0.4.4 msrest_azure/0.4.3 iothubclient/0.1.0 Azure-SDK-For-Python AZURECLI/0.1.0b7'
msrest.http_logger :     'Authorization': 'Bearer xxxxxxxxxx'
msrest.http_logger :     'CommandName': 'iot hub delete'
msrest.http_logger :     'x-ms-client-request-id': 'xxxxxxxxxx'
msrest.http_logger :     'Content-Type': 'application/json; charset=utf-8'
msrest.http_logger :     'accept-language': 'en-US'
msrest.http_logger : Request body:
msrest.http_logger : None
requests.packages.urllib3.connectionpool : Starting new HTTPS connection (1): management.azure.com
requests.packages.urllib3.connectionpool : "GET /subscriptions/xxxxxxxxxx/resourceGroups/iot-sample-kevinzha/providers/Microsoft.Devices/IotHubs/kevinzha-iot-hub/operationResults/NWM2MDU1NzMtNzMxOS00ODc5LTk0NWYtYTIyYzU2MTg5Mzcz?api-version=2016-02-03&asyncinfo HTTP/1.1" 200 None
msrest.pipeline : Received status: 200 for method 'GET'
msrest.pipeline : Is forced retry: False
msrest.http_logger : Response status: 200
msrest.http_logger : Response headers:
msrest.http_logger :     'Cache-Control': 'no-cache'
msrest.http_logger :     'Pragma': 'no-cache'
msrest.http_logger :     'Transfer-Encoding': 'chunked'
msrest.http_logger :     'Content-Type': 'application/json; charset=utf-8'
msrest.http_logger :     'Content-Encoding': 'gzip'
msrest.http_logger :     'Expires': '-1'
msrest.http_logger :     'Vary': 'Accept-Encoding'
msrest.http_logger :     'Server': 'Microsoft-HTTPAPI/2.0'
msrest.http_logger :     'x-ms-ratelimit-remaining-subscription-reads': '14997'
msrest.http_logger :     'x-ms-request-id': 'xxxxxxxxxx'
msrest.http_logger :     'x-ms-correlation-request-id': 'xxxxxxxxxx'
msrest.http_logger :     'x-ms-routing-request-id': 'JAPANEAST:20161024T024118Z:xxxxxxxxxx'
msrest.http_logger :     'Strict-Transport-Security': 'max-age=31536000; includeSubDomains'
msrest.http_logger :     'Date': 'Mon, 24 Oct 2016 02:41:18 GMT'
msrest.http_logger : Response content:
msrest.http_logger : Body contains chunked data.
msrest.exceptions : Unknown error