Monitoring outputs different results depending on what times I enter to the query

[bulkware]

• Package Name: azure-mgmt-monitor
• Package Version: 0.9.0
• Operating System: CentOS Linux 7
• Python Version: 2.7.5

Describe the bug
Monitoring outputs different results depending on what times I enter to the query.

To Reproduce
Steps to reproduce the behavior:

1. Run example code:

#!/usr/bin/python

# Python imports
import datetime
import json

# Azure imports
import adal
from azure.mgmt.monitor import MonitorManagementClient
from azure.mgmt.resource import ResourceManagementClient
from msrestazure.azure_active_directory import AADTokenCredentials
from msrestazure.azure_cloud import AZURE_PUBLIC_CLOUD

# Customer data
client_id = "<snip>"
pem_file = "<snip>"
pem_thumbprint = "<snip>"
resource_group = "<snip>"
resource_name = "<snip>"
subscription_id = "<snip>"
tenant_id = "<snip>"

# Read PEM-file
with open(pem_file, 'r') as file:
  pem_key = file.read()

# Create authentication context
login_endpoint = AZURE_PUBLIC_CLOUD.endpoints.active_directory
api = AZURE_PUBLIC_CLOUD.endpoints.active_directory_resource_id
context = adal.AuthenticationContext("{}/{}".format(
    login_endpoint,
    tenant_id
))

# Acquire token with client certificate
management_token = context.acquire_token_with_client_certificate(
    api,
    client_id,
    pem_key,
    pem_thumbprint
)

# Create credentials object
credentials = AADTokenCredentials(
    management_token,
    client_id
)

# Instantiate new monitoring client
client = MonitorManagementClient(
    credentials,
    subscription_id
)

# Create resource ID
resource_id = ('subscriptions/{}/resourceGroups/{}/providers/Microsoft.DBforMySQL/servers/{}').format(
  subscription_id,
  resource_group,
  resource_name
)

# Set explicit datetimes to retrieve data from
datetimes = [
  {
    "start_time": datetime.datetime.strptime('2020-05-27T10:19:25', '%Y-%m-%dT%H:%M:%S'), # Zabbix epoch
    "end_time": datetime.datetime.strptime('2020-05-27T10:20:25', '%Y-%m-%dT%H:%M:%S')
  },
  {
    "start_time": datetime.datetime.strptime('2020-05-27T10:20:25', '%Y-%m-%dT%H:%M:%S'), # Zabbix epoch
    "end_time": datetime.datetime.strptime('2020-05-27T10:21:25', '%Y-%m-%dT%H:%M:%S')
  },
  {
    "start_time": datetime.datetime.strptime('2020-05-27T10:21:25', '%Y-%m-%dT%H:%M:%S'), # Zabbix epoch
    "end_time": datetime.datetime.strptime('2020-05-27T10:22:26', '%Y-%m-%dT%H:%M:%S')
  },
  {
    "start_time": datetime.datetime.strptime('2020-05-27T10:19:00', '%Y-%m-%dT%H:%M:%S'), # Even minute
    "end_time": datetime.datetime.strptime('2020-05-27T10:20:00', '%Y-%m-%dT%H:%M:%S')
  },
  {
    "start_time": datetime.datetime.strptime('2020-05-27T10:20:00', '%Y-%m-%dT%H:%M:%S'), # Even minute
    "end_time": datetime.datetime.strptime('2020-05-27T10:21:00', '%Y-%m-%dT%H:%M:%S')
  },
  {
    "start_time": datetime.datetime.strptime('2020-05-27T10:21:00', '%Y-%m-%dT%H:%M:%S'), # Even minute
    "end_time": datetime.datetime.strptime('2020-05-27T10:22:00', '%Y-%m-%dT%H:%M:%S')
  },
  {
    "start_time": datetime.datetime.strptime('2020-05-27T10:20:00', '%Y-%m-%dT%H:%M:%S'), # Two minutes
    "end_time": datetime.datetime.strptime('2020-05-27T10:22:00', '%Y-%m-%dT%H:%M:%S')
  }
]

# Loop datetimes, retrieve and output data
for item in datetimes:

  print("start_time: {}".format(item["start_time"].strftime('%Y-%m-%dT%H:%M:%SZ')))
  print("end_time: {}".format(item["end_time"].strftime('%Y-%m-%dT%H:%M:%SZ')))

  metrics_data = client.metrics.list(
      resource_id,
      timespan="{}/{}".format(
          item["start_time"].strftime('%Y-%m-%dT%H:%M:%SZ'),
          item["end_time"].strftime('%Y-%m-%dT%H:%M:%SZ')
      ),
      interval="PT1M",
      metricnames="connections_failed",
      aggregation="Total",
      result_type="Data",
      timeout=15
  )

  # Loop metric/timeserie/data and output results
  for item in metrics_data.value:
      for timeserie in item.timeseries:
          for data in timeserie.data:
              print(data)

  print("")

2. Check output:

start_time: 2020-05-27T10:19:25Z
end_time: 2020-05-27T10:20:25Z
{'count': None, 'average': None, 'maximum': None, 'minimum': None, 'additional_properties': {}, 'time_stamp': datetime.datetime(2020, 5, 27, 10, 19, tzinfo=<isodate.tzinfo.Utc object at 0x7fc3615f0550>), 'total': 0.0}

start_time: 2020-05-27T10:20:25Z
end_time: 2020-05-27T10:21:25Z
{'count': None, 'average': None, 'maximum': None, 'minimum': None, 'additional_properties': {}, 'time_stamp': datetime.datetime(2020, 5, 27, 10, 20, tzinfo=<isodate.tzinfo.Utc object at 0x7fc3615f0550>), 'total': 0.0}

start_time: 2020-05-27T10:21:25Z
end_time: 2020-05-27T10:22:26Z
{'count': None, 'average': None, 'maximum': None, 'minimum': None, 'additional_properties': {}, 'time_stamp': datetime.datetime(2020, 5, 27, 10, 21, tzinfo=<isodate.tzinfo.Utc object at 0x7fc3615f0550>), 'total': 0.0}

start_time: 2020-05-27T10:19:00Z
end_time: 2020-05-27T10:20:00Z
{'count': None, 'average': None, 'maximum': None, 'minimum': None, 'additional_properties': {}, 'time_stamp': datetime.datetime(2020, 5, 27, 10, 19, tzinfo=<isodate.tzinfo.Utc object at 0x7fc3615f0550>), 'total': 0.0}

start_time: 2020-05-27T10:20:00Z
end_time: 2020-05-27T10:21:00Z
{'count': None, 'average': None, 'maximum': None, 'minimum': None, 'additional_properties': {}, 'time_stamp': datetime.datetime(2020, 5, 27, 10, 20, tzinfo=<isodate.tzinfo.Utc object at 0x7fc3615f0550>), 'total': 0.0}

start_time: 2020-05-27T10:21:00Z
end_time: 2020-05-27T10:22:00Z
{'count': None, 'average': None, 'maximum': None, 'minimum': None, 'additional_properties': {}, 'time_stamp': datetime.datetime(2020, 5, 27, 10, 21, tzinfo=<isodate.tzinfo.Utc object at 0x7fc3615f0550>), 'total': 0.0}

start_time: 2020-05-27T10:20:00Z
end_time: 2020-05-27T10:22:00Z
{'count': None, 'average': None, 'maximum': None, 'minimum': None, 'additional_properties': {}, 'time_stamp': datetime.datetime(2020, 5, 27, 10, 20, tzinfo=<isodate.tzinfo.Utc object at 0x7fc3615f0550>), 'total': 2.0}
{'count': None, 'average': None, 'maximum': None, 'minimum': None, 'additional_properties': {}, 'time_stamp': datetime.datetime(2020, 5, 27, 10, 21, tzinfo=<isodate.tzinfo.Utc object at 0x7fc3615f0550>), 'total': 3.0}

Expected behavior
I expected to receive a total of 2.0 at time 10:20 and a total of 3.0 at time 10:21.

Additional context
I cannot enter customer data here so I believe this might not be as easy to reproduce. If you need further information, please contact me. I can also reproduce this using the Azure CLI. I'll be happy to provide additional information about this.

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @sameergMS, @dadunl.

[bulkware]

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