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  1. Core Server
  2. SERVER-33317

3.7 sharded clusters ignore create command write concern

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Works as Designed
    • 3.7.3
    • None
    • Sharding
    • None
    • ALL

    Description

      Sending the create command with a nonsensical write concern to a 3.7 replica set with three members results in a write concern error:

      >>> c = pymongo.MongoClient()
      		 
      >>> c.foo.command('create', 'bar', writeConcern={'w': 1000})
      		 
      {'ok': 1.0, 'operationTime': Timestamp(1518570804, 1), 'writeConcernError': {'codeName': 'CannotSatisfyWriteConcern', 'errmsg': 'Not enough data-bearing nodes', 'code': 100}, '$clusterTime': {'signature': {'keyId': 0, 'hash': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'}, 'clusterTime': Timestamp(1518570804, 1)}}
      		 
      >>> c.admin.command('buildInfo')['version']
      		 
      '3.7.1-370-gfab8bda846'

      Sending the same command to a mongos in front of a single three member shard does not cause a write concern error:

      >>> c = pymongo.MongoClient()
      		 
      >>> c.foo.command('create', 'bar', writeConcern={'w': 1000})
      		 
      {'ok': 1.0, '$clusterTime': {'signature': {'keyId': 0, 'hash': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'}, 'clusterTime': Timestamp(1518571939, 3)}, 'operationTime': Timestamp(1518571939, 2)}
      		 
      >>> c.admin.command('buildInfo')['version']
      		 
      '3.7.1-370-gfab8bda846'

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        Issue Links

          is depended on by

          Task - A task that needs to be done. PYTHON-1470 Fix test_collection.TestCollection.test_create for MongoDB 3.7

          • Minor - P4 - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-33332 mongos create command should preserve wtimeout option given by user

          • Major - P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. SERVER-34776 dropDatabase should respect user provided writeConcern

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Task - A task that needs to be done. DOCS-11585 Mongos uses majority writeconcern for all metadata operations

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              randolph@mongodb.com Randolph Tan
              bernie@mongodb.com Bernie Hackett
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              Dates

                Created:
                Updated:
                Resolved: