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From GitBox <...@apache.org>
Subject [GitHub] [libcloud] Wenzel opened a new issue #1607: MinIO: ObjectHashMismatchError when trying to upload object
Date Sat, 25 Sep 2021 08:14:36 GMT

Wenzel opened a new issue #1607:
URL: https://github.com/apache/libcloud/issues/1607


   ## Summary
   
   The MinIO provider raises an `ObjectHashMismatchError` when trying to upload an object,
for no clear reason
   100% reproducible, code to repro the bug is provided
   
   ## Detailed Information
   
   libcloud: latest stable, 3.3.1
   Python: 3.8.10
   OS: Ubuntu 20.04
   
   Here you can find a repo to repro the bug, using `pytest` (Actually there are 2 bugs to
report):
   https://github.com/Wenzel/libcloud_bug
   
   ~~~python3
   $ pytest -k test_demo_ObjectHashMismatchError_with_pyfakefs
   clean_minio_db = <libcloud.storage.drivers.minio.MinIOStorageDriver object at 0x7f1410f3fdf0>,
fs = <pyfakefs.fake_filesystem.FakeFilesystem object at 0x7f141021fa90>
   
       def test_demo_ObjectHashMismatchError_with_pyfakefs(clean_minio_db, fs):
           # create test file
           test_file = "/file1.txt"
           test_file_data = b"hello"
           with open(test_file, "wb") as f:
               f.write(test_file_data)
           # create container
           driver = clean_minio_db
           container = driver.create_container('test')
           # test
   >       driver.upload_object(str(test_file), container, 'test_file')
   
   /home/wenzel/Projets/libcloud_bug/tests/test_demo_bug.py:13: 
   _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _
   /home/wenzel/.cache/pypoetry/virtualenvs/libcloud-bug-IT-EyGKG-py3.8/lib/python3.8/site-packages/libcloud/storage/drivers/s3.py:545:
in upload_object
       return self._put_object(container=container, object_name=object_name,
   _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _
   
   self = <libcloud.storage.drivers.minio.MinIOStorageDriver object at 0x7f1410f3fdf0>,
container = <Container: name=test, provider=MinIO Storage Driver>, object_name = 'test_file',
method = 'PUT'
   query_args = None, extra = {}, file_path = '/file1.txt', stream = None, verify_hash = True,
storage_class = None, headers = {'connection': 'close', 'content-type': 'text/plain; charset=utf-8'}
   
       def _put_object(self, container, object_name, method='PUT',
                       query_args=None, extra=None, file_path=None,
                       stream=None, verify_hash=True, storage_class=None,
                       headers=None):
           headers = headers or {}
           extra = extra or {}
       
           headers.update(self._to_storage_class_headers(storage_class))
       
           content_type = extra.get('content_type', None)
           meta_data = extra.get('meta_data', None)
           acl = extra.get('acl', None)
       
           if meta_data:
               for key, value in list(meta_data.items()):
                   key = self.http_vendor_prefix + '-meta-%s' % (key)
                   headers[key] = value
       
           if acl:
               headers[self.http_vendor_prefix + '-acl'] = acl
       
           request_path = self._get_object_path(container, object_name)
       
           if query_args:
               request_path = '?'.join((request_path, query_args))
       
           result_dict = self._upload_object(
               object_name=object_name, content_type=content_type,
               request_path=request_path, request_method=method,
               headers=headers, file_path=file_path, stream=stream)
       
           response = result_dict['response']
           bytes_transferred = result_dict['bytes_transferred']
           headers = response.headers
           response = response
           server_hash = headers.get('etag', '').replace('"', '')
           server_side_encryption = headers.get('x-amz-server-side-encryption',
                                                None)
           aws_kms_encryption = (server_side_encryption == 'aws:kms')
           hash_matches = (result_dict['data_hash'] == server_hash)
       
           # NOTE: If AWS KMS server side encryption is enabled, ETag won't
           # contain object MD5 digest so we skip the checksum check
           # See https://docs.aws.amazon.com/AmazonS3/latest/API
           # /RESTCommonResponseHeaders.html
           # and https://github.com/apache/libcloud/issues/1401
           # for details
           if verify_hash and not aws_kms_encryption and not hash_matches:
   >           raise ObjectHashMismatchError(
                   value='MD5 hash {0} checksum does not match {1}'.format(
                       server_hash, result_dict['data_hash']),
   E                   libcloud.storage.types.ObjectHashMismatchError: <ObjectHashMismatchError
in <libcloud.storage.drivers.minio.MinIOStorageDriver object at 0x7f1410f3fdf0>, value=MD5
hash  checksum does not match 5d41402abc4b2a76b9719d911017c592, object = test_file>
   
   /home/wenzel/.cache/pypoetry/virtualenvs/libcloud-bug-IT-EyGKG-py3.8/lib/python3.8/site-packages/libcloud/storage/drivers/s3.py:922:
ObjectHashMismatchError
   -------------------------------------------------------------------------------------------
Captured stdout setup -------------------------------------------------------------------------------------------
   db2dfd078b96e1b0932dc354926aadb77adba2d8c19b8ccc875e7fe5163e8f46
   -----------------------------------------------------------------------------------------
Captured stdout teardown ------------------------------------------------------------------------------------------
   libcloud_bug_objectmistmatch_miniodb
   ==========================================================================================
short test summary info ==========================================================================================
   FAILED tests/test_demo_bug.py::test_demo_ObjectHashMismatchError_with_pyfakefs - libcloud.storage.types.ObjectHashMismatchError:
<ObjectHashMismatchError in <libcloud.storage.drivers.minio.MinIOStorageD..
   ~~~
   
   It looks like there is a hash mismatch when `upload_object` is verifying the hash, but
for no clear reason.
   
   Thanks for maintaining libcloud !


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