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CollectionUUIDMismatch

Description

CollectionUUIDMismatch: A collection exists on a shard with a locally registered UUID that differs from the one registered in the config.collections cluster catalog.
New in version 7.0.

Format

{
   type: "CollectionUUIDMismatch",
   description: "<string>",
   details: {
      namespace: "<string>",
      shard: "<string>",
      localUUID: UUID("<uuid>"),
      uuid: UUID("<uuid>")
   }
}

CollectionUUIDMismatch inconsistency documents contain the following fields:

Field	Type	Description
`type`	string	Type of inconsistency document. Returns a value of `CollectionUUIDMismatch` for this inconsistency type.
`description`	string	Describes the nature of the inconsistency found in the metadata.
`details`	document	Document with additional information on where the inconsistency exists in the database and sharded cluster.
`details.namespace`	string	Indicates the database and collection where the inconsistency exists.
`details.shard`	string	The shard where the inconsistency exists.
`details.localUUID`	UUID	The UUID registered locally on the shard.
`details.uuid`	UUID	The UUID of the collection found in the `config.collections` cluster catalog.

Example

Use the db.adminCommand() method to call the checkMetadataConsistency command:

db.adminCommand( { checkMetadataConsistency: 1 } )

The method returns a cursor with a batch of documents showing the inconsistencies found in the sharding metadata. The example below shows a cursor with a CollectionUUIDMismatch inconsistency document:

{
   cursor: {
      id: Long("0"),
      ns: "test.$cmd.aggregate",
      firstBatch: [
         {
            type: "CollectionUUIIDMismatch",
            description: "Found collection on non primary shard with mismatching UUID",
            details: {
               namespace: "test.authors",
               shard: "shard02",
               localUUID: new UUID("1ad56770-61e2-48e9-83c6-8ecefe73cfc4"),
               uuid: new UUID("a3153e8a-3544-43ec-928f-37f72b48dee9")
            }
         }
      ],
   },
   ok: 1
}

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Inconsistency Types

CorruptedChunkShardKey