Database Manual / Sharding / Reference / Inconsistency Types

CollectionAuxiliaryMetadataMismatch

Description描述

CollectionAuxiliaryMetadataMismatch

A collection contains mismatching auxiliary metadata across different shards.一个集合包含不同分片之间不匹配的辅助元数据。

New in version 8.1.在版本8.1中新增。

Format格式

{
   type: "CollectionAuxiliaryMetadataMismatch",
   description: "<string>",
   details: {
      namespace: "<string>",
      collectionMetadata: <array>
   }
}

CollectionAuxiliaryMetadataMismatch inconsistency documents contain these 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 CollectionAuxiliaryMetadataMismatch for this inconsistency type.不一致文档的类型。返回此不一致类型的CollectionAuxiliaryMetadataMismatch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.collectionMetadataarray数组Lists the mismatching auxiliary metadata found per shard.列出每个分片发现的不匹配的辅助元数据。

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 CollectionAuxiliaryMetadataMismatch 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CollectionAuxiliaryMetadataMismatch不一致文档的游标：

{
   cursor: {
      id: Long("0"),
      ns: "test.$cmd.aggregate",
      firstBatch: [
         {
            type: "CollectionAuxiliaryMetadataMismatch",
            description: "Found collection with mismatching auxiliary metadata across shards and/or config server",
            details: {
               namespace: "test.authors",
               collectionMetadata: [
                  { "md": { "exampleField": 123 }, "shards": [ "shard0" ] },
                  { "md": { "exampleField": 321 }, "shards": [ "shard1" ] }
               ]
            }
         }
      ],
   },
   ok: 1
}