ZonesRangeOverlap

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Description

Format
Example

Description

ZonesRangeOverlap: Overlapping zones exist for the same collection.
New in version 7.0.

Format

{
   type: "ZonesRangeOverlap",
   description: "<string>",
   details: {
      namespace: "<string>",
      collectionUUID: <string>,
      zoneA: {<document>},
      zoneB: {<document>}
   }
}

ZonesRangeOverlap inconsistency documents contain the following fields:

Field	Type	Description
`type`	string	Type of inconsistency document. Returns a value of `ZonesRangeOverlap` 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.
`details.zoneA`	document	The first zone that overlaps with the second zone.
`details.zoneB`	document	The second zone that overlaps with the first zone.

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 ZonesRangeOverlap inconsistency document:

{
   cursor: {
      id: Long("0"),
      ns: "test.$cmd.aggregate",
      firstBatch: [
         {
            type: "ZonesRangeOverlap",
            description: "Found two overlapping zones",
            details: {
               namespace: "test.authors",
               collectionUUID: new UUID("62ebdb7e-a7bb-4151-a620-49d44cef097f"),
               zoneA: {
                  ns: "test.authors",
                  tag: "64ddec77e0d32b766bb8d5fe",
                  min: { x: MinKey },
                  max: { x: 0 }
               },
               zoneB: {
                  ns: "test.authors",
                  tag: "64ddec77e0d32b766bb8d5ff",
                  min: { x: -10 },
                  max: { x: MaxKey }
               }
             }
          }
      ],
   },
   ok: 1
}

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