Database Manual / Sharding / Reference / Inconsistency Types

CorruptedChunkShardKey

Description

CorruptedChunkShardKey

The routing table contains a chunk with a min key or max key that doesn't correspond to the collection shard key.

New in version 7.0.

Format

{
   type: "CorruptedChunkShardKey",
   description: "<string>",
   details: {
      namespace: "<string>",
      collectionUUID: UUID("<uuid>"),
      chunk: <chunk>,
      shardKeyPattern: <pattern>
   }
}

CorruptedChunkShardKey inconsistency documents contain the following fields:

FieldTypeDescription

type

string

Type of inconsistency document. Returns a value of CorruptedChunkShardKey for this inconsistency type.

description

string

Describes 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.collectionUUID

UUID

UUID of the collection with the corrupted chunk shard key.

details.chunk

document

Chunk with the corrupted shard key.

details.shardKeyPattern

document

Collection shard key pattern.

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 CorruptedChunkShardKey inconsistency document:

{
   cursor: {
      id: Long("0"),
      ns: "test.$cmd.aggregate",
      firstBatch: [
         {
            type: "CorruptedChunkShardKey",
            description: "Found chunk with a shard key pattern violation",
            details: {
               namespace: "test.authors",
               collectionUUID : new UUID("1ad56770-61e2-48e9-83c6-8ecefe73cfc4"),
               chunk: {
                  _id: ObjectId("64ddd81656be208c6685da1b"),
                  uuid: new UUID("de934e0a-74d2-412b-9bb8-409abe9754e3"),
                  min: {
                     y: 0
                  },
                  max: {
                     x: MaxKey
                  },
                  shard: "shard0000",
                  lastmod: Timestamp(1, 0),
                  onCurrentShardSince: Timestamp(1, 0),
                  history: [
                     {
                        validAfter: Timestamp(1, 0),
                        shard: "shard0000"
                     }
                  ]
               },
               shardKeyPattern: {
                  x: 1
               }
            }
         }
      ],
   },
   ok: 1
}