Database Manual / Sharding / Reference / Inconsistency Types

CollectionUUIDMismatch

Description描述

CollectionUUIDMismatch

A collection exists on a shard with a locally registered UUID that differs from the one registered in the config.collections cluster catalog.分片上存在一个集合，其本地注册的UUID与config.collections集群目录中注册的UUID不同。

New in version 7.0.在版本7.0中新增。

Format格式

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

CollectionUUIDMismatch inconsistency documents contain the following fields:不一致文档包含以下字段：

Field字段Type类型Description描述
typestring字符串Type of inconsistency document. Returns a value of CollectionUUIDMismatch for this inconsistency type.不一致文档的类型。返回此不一致类型的CollectionUUIDMismatch的值。
descriptionstring字符串Describes the inconsistency found in the metadata.描述元数据中发现的不一致。
detailsdocument文档Document with additional information on where the inconsistency exists in the database and sharded cluster.包含数据库和分片集群中不一致位置的附加信息的文档。
details.namespacestring字符串Indicates the database and collection where the inconsistency exists.指示存在不一致的数据库和集合。
details.shardstring字符串The shard where the inconsistency exists.存在不一致的分片。
details.localUUIDUUIDThe UUID registered locally on the shard.在分片上本地注册的UUID。
details.uuidUUIDThe UUID of the collection found in the config.collections cluster catalog.在config.collections群集目录中找到的集合的UUID。

Example示例

Use the db.adminCommand() method to call the checkMetadataConsistency command:使用db.adminCommand()方法调用checkMetadataConsistency命令：

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:该方法返回一个游标，其中包含一批文档，显示分片元数据中发现的不一致。下面的示例显示了一个带有CollectionUUIDMismatch不一致文档的游标：

{
   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
}