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Inconsistency Types

CorruptedChunkShardKey

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  • Description
  • Format
  • Example

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:

Field
Type
Description
type
string

Type of inconsistency document. Returns a value of CorruptedChunkShardKey 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.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
}

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CollectionUUIDMismatch