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Investigate novel pub/sub system test failures

  1. Subscription.pull(return_immedately=False, max_messages=2) returns immediately (See 'Subscription.pull(return_immedately=False, max_messages=2)' returns immediately :( #893)
  2. Missing ACK ID
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ERROR: test_message_pull_mode_e2e (pubsub.TestPubsub)
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Traceback (most recent call last):
  File "/home/travis/build/GoogleCloudPlatform/gcloud-python/system_tests/pubsub.py", line 123, in test_message_pull_mode_e2e
    subscription.acknowledge(ack_ids)
  File "/home/travis/build/GoogleCloudPlatform/gcloud-python/.tox/system-tests/lib/python2.7/site-packages/gcloud/pubsub/subscription.py", line 230, in acknowledge
    method='POST', path='%s:acknowledge' % (self.path,), data=data)
  File "/home/travis/build/GoogleCloudPlatform/gcloud-python/.tox/system-tests/lib/python2.7/site-packages/gcloud/connection.py", line 419, in api_request
    error_info=method + ' ' + url)
gcloud.exceptions.BadRequest: 400 You have not specified an ack ID in the request. (POST https://pubsub.googleapis.com/v1/projects/precise-truck-742/subscriptions/subscribing-now:acknowledge)
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From:

  1. https://travis-ci.org/GoogleCloudPlatform/gcloud-python/builds/75334450
  2. https://travis-ci.org/GoogleCloudPlatform/gcloud-python/builds/77188348
  3. https://travis-ci.org/GoogleCloudPlatform/gcloud-python/builds/77564743
  4. https://travis-ci.org/GoogleCloudPlatform/gcloud-python/builds/94920686
  5. Only one message returned
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ERROR: test_message_pull_mode_e2e (pubsub.TestPubsub)
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Traceback (most recent call last):
  File "/home/travis/build/GoogleCloudPlatform/gcloud-python/system_tests/pubsub.py", line 129, in test_message_pull_mode_e2e
    message1, message2 = sorted(messages, key=_by_timestamp)
ValueError: need more than 1 value to unpack
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From:

  1. https://travis-ci.org/GoogleCloudPlatform/gcloud-python/builds/77052107
  2. https://travis-ci.org/GoogleCloudPlatform/gcloud-python/builds/98407178
  3. Eventual Consistency Error
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FAIL: test_list_subscriptions (pubsub.TestPubsub)
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Traceback (most recent call last):
  File "/home/travis/build/GoogleCloudPlatform/gcloud-python/system_tests/pubsub.py", line 100, in test_list_subscriptions
    self.assertEqual(len(created), len(subscriptions_to_create))
AssertionError: 2 != 3
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FAIL: test_list_topics (pubsub.TestPubsub)
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Traceback (most recent call last):
  File "/home/travis/build/GoogleCloudPlatform/gcloud-python/system_tests/pubsub.py", line 62, in test_list_topics
    self.assertEqual(len(created), len(topics_to_create))
AssertionError: 2 != 3
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Ran 5 tests in 66.301s
FAILED (failures=2)

From:

  1. https://travis-ci.org/GoogleCloudPlatform/gcloud-python/builds/77600321
  2. https://travis-ci.org/GoogleCloudPlatform/gcloud-python/builds/78109143