updateZoneKeyRange is inconsistent with updating and deleting tags when tag ranges are prefix for shard key

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    • Type: Bug
    • Resolution: Duplicate
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: None
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    • Sharding
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      mongos> sh.shardCollection("test.c" , {a: 1, b: 1})
{
    "collectionsharded" : "test.c",
    "collectionUUID" : UUID("5c33de36-7f4a-4cc0-bdf1-b8101a7d34b1"),
    "ok" : 1,
    "operationTime" : Timestamp(1573048485, 13),
    "$clusterTime" : {
        "clusterTime" : Timestamp(1573048485, 13),
        "signature" : {
            "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
            "keyId" : NumberLong(0)
        }
    }
}
mongos> use admin
mongos> sh.addShardToZone("shard01", "zone1")
{
    "ok" : 1,
    "operationTime" : Timestamp(1573048597, 1),
    "$clusterTime" : {
        "clusterTime" : Timestamp(1573048597, 1),
        "signature" : {
            "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
            "keyId" : NumberLong(0)
        }
    }
}
mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1}, max: {a: 2}, zone: "zone1"}) 
{
    "ok" : 1,
    "operationTime" : Timestamp(1573048606, 8),
    "$clusterTime" : {
        "clusterTime" : Timestamp(1573048606, 8),
        "signature" : {
            "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
            "keyId" : NumberLong(0)
        }
    }
}

mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1}, max: {a: 2}, zone: null}) // Command succeeds but doesn't delete the tag range.
{
    "ok" : 1,
    "operationTime" : Timestamp(1573049199, 1),
    "$clusterTime" : {
        "clusterTime" : Timestamp(1573049199, 1),
        "signature" : {
            "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
            "keyId" : NumberLong(0)
        }
    }
}
mongos> db.getSiblingDB("config").tags.find()
{ "_id" : ObjectId("5dc2d11e8bc365c6f4466713"), "ns" : "test.c", "min" : { "a" : 1, "b" : { "$minKey" : 1 } }, "max" : { "a" : 2, "b" : { "$minKey" : 1 } }, "tag" : "zone1" }
mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1, b: MinKey}, max: {a: 2, b: MinKey}, zone: null}) // Deletes the tag range.
{
	"ok" : 1,
	"operationTime" : Timestamp(1573049663, 1),
	"$clusterTime" : {
		"clusterTime" : Timestamp(1573049663, 1),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	}
}
mongos> db.getSiblingDB("config").tags.find({min: {a: 1, b : MinKey}})
mongos>
      Show
      mongos> sh.shardCollection( "test.c" , {a: 1, b: 1}) { "collectionsharded" : "test.c" , "collectionUUID" : UUID( "5c33de36-7f4a-4cc0-bdf1-b8101a7d34b1" ), "ok" : 1, "operationTime" : Timestamp(1573048485, 13), "$clusterTime" : { "clusterTime" : Timestamp(1573048485, 13), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } } mongos> use admin mongos> sh.addShardToZone( "shard01" , "zone1" ) { "ok" : 1, "operationTime" : Timestamp(1573048597, 1), "$clusterTime" : { "clusterTime" : Timestamp(1573048597, 1), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } } mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1}, max: {a: 2}, zone: "zone1" }) { "ok" : 1, "operationTime" : Timestamp(1573048606, 8), "$clusterTime" : { "clusterTime" : Timestamp(1573048606, 8), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } } mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1}, max: {a: 2}, zone: null }) // Command succeeds but doesn't delete the tag range. { "ok" : 1, "operationTime" : Timestamp(1573049199, 1), "$clusterTime" : { "clusterTime" : Timestamp(1573049199, 1), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } } mongos> db.getSiblingDB( "config" ).tags.find() { "_id" : ObjectId( "5dc2d11e8bc365c6f4466713" ), "ns" : "test.c" , "min" : { "a" : 1, "b" : { "$minKey" : 1 } }, "max" : { "a" : 2, "b" : { "$minKey" : 1 } }, "tag" : "zone1" } mongos> db.runCommand({updateZoneKeyRange: "test.c" , min : {a: 1, b: MinKey}, max: {a: 2, b: MinKey}, zone: null }) // Deletes the tag range. { "ok" : 1, "operationTime" : Timestamp(1573049663, 1), "$clusterTime" : { "clusterTime" : Timestamp(1573049663, 1), "signature" : { "hash" : BinData(0, "AAAAAAAAAAAAAAAAAAAAAAAAAAA=" ), "keyId" : NumberLong(0) } } } mongos> db.getSiblingDB( "config" ).tags.find({min: {a: 1, b : MinKey}}) mongos>
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      If we define a tag range based prefix of a shard key, the updateZoneKeyRange command fills in 'MinKey' for all the missing shard key fields when updating a tag range. But it doesn't do that when deleting. Users would have to specify the full shard key by adding in 'MinKey' for the missing fields.

      It would be helpful if the docs for updateZoneKeyRange also mentions this.

            Assignee:
            [DO NOT USE] Backlog - Sharding Team
            Reporter:
            Arun Banala
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              Created:
              Updated:
              Resolved: