Database Manual / Sharding / Reference / Inconsistency Types

RoutingTableMissingMaxKey

Description

RoutingTableMissingMaxKey

A range gap exists in the routing table. The last chunk boundary in the routing table does not reach the maximum key value.

New in version 7.0.

Format

{
   type: "RoutingTableMissingMaxKey",
   description: "<string>",
   details: {
      namespace: "<string>",
      collectionUUID: <string>,
      maxKeyObj: { <document> },
      globalMax: { <document> }
   }
}

RoutingTableMissingMaxKey inconsistency documents contain the following fields:

FieldTypeDescription

type

string

Type of inconsistency document. Returns a value of RoutingTableMissingMaxKey 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.

details.maxKeyObj

document

The max key used by the collection.

details.globalMax

document

The expected max key of the collection.

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 RoutingTableMissingMaxKey inconsistency document:

{
   cursor: {
      id: Long("0"),
      ns: "test.$cmd.aggregate",
      firstBatch: [
         {
            type: "RoutingTableMissingMaxKey",
            description: "Routing table has a gap because last chunk boundary does not reach MaxKey",
            details: {
               namespace: "test.authors",
               collectionUUID: new UUID("62ebdb7e-a7bb-4151-a620-49d44cef097f"),
               maxKeyObj: {
                  x: 0
               },
               globalMax: {
                  x: MaxKey
               }
            }
         }
      ],
   },
   ok: 1
}