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//
// Basic tests for reshardCollection.
// @tags: [
// uses_atclustertime,
// ]
//
load("jstests/libs/fail_point_util.js");
load("jstests/sharding/libs/find_chunks_util.js");
load("jstests/libs/discover_topology.js");
load("jstests/sharding/libs/reshard_collection_util.js");
(function() {
'use strict';
const st = new ShardingTest({mongos: 1, shards: 2});
const kDbName = 'db';
const collName = 'foo';
const ns = kDbName + '.' + collName;
const mongos = st.s0;
const kNumInitialDocs = 500;
const reshardCmdTest =
new ReshardCollectionCmdTest({st, dbName: kDbName, collName, numInitialDocs: kNumInitialDocs});
const criticalSectionTimeoutMS = 24 * 60 * 60 * 1000; /* 1 day */
const topology = DiscoverTopology.findConnectedNodes(mongos);
const coordinator = new Mongo(topology.configsvr.nodes[0]);
assert.commandWorked(coordinator.getDB("admin").adminCommand(
{setParameter: 1, reshardingCriticalSectionTimeoutMillis: criticalSectionTimeoutMS}));
let presetReshardedChunks =
[{recipientShardId: st.shard1.shardName, min: {newKey: MinKey}, max: {newKey: MaxKey}}];
/**
* Fail cases
*/
jsTest.log('Fail if sharding is disabled.');
assert.commandFailedWithCode(mongos.adminCommand({reshardCollection: ns, key: {newKey: 1}}),
ErrorCodes.NamespaceNotFound);
assert.commandWorked(mongos.adminCommand({enableSharding: kDbName}));
jsTest.log("Fail if collection is unsharded.");
assert.commandFailedWithCode(mongos.adminCommand({reshardCollection: ns, key: {newKey: 1}}),
ErrorCodes.NamespaceNotSharded);
assert.commandWorked(mongos.adminCommand({shardCollection: ns, key: {oldKey: 1}}));
jsTest.log("Fail if missing required key.");
assert.commandFailedWithCode(mongos.adminCommand({reshardCollection: ns}), 40414);
jsTest.log("Fail if unique is specified and is true.");
assert.commandFailedWithCode(
mongos.adminCommand({reshardCollection: ns, key: {newKey: 1}, unique: true}),
ErrorCodes.BadValue);
jsTest.log("Fail if collation is specified and is not {locale: 'simple'}.");
assert.commandFailedWithCode(
mongos.adminCommand({reshardCollection: ns, key: {newKey: 1}, collation: {locale: 'en_US'}}),
ErrorCodes.BadValue);
jsTest.log("Fail if both numInitialChunks and _presetReshardedChunks are provided.");
assert.commandFailedWithCode(mongos.adminCommand({
reshardCollection: ns,
key: {newKey: 1},
unique: false,
collation: {locale: 'simple'},
numInitialChunks: 2,
_presetReshardedChunks: presetReshardedChunks
}),
ErrorCodes.BadValue);
jsTest.log("Fail if the zone provided is not assigned to a shard.");
const nonExistingZoneName = 'x0';
assert.commandFailedWithCode(mongos.adminCommand({
reshardCollection: ns,
key: {newKey: 1},
unique: false,
collation: {locale: 'simple'},
zones: [{zone: nonExistingZoneName, min: {newKey: 5}, max: {newKey: 10}}],
numInitialChunks: 2,
}),
4952607);
jsTestLog("Fail if splitting collection into multiple chunks while it is still empty.");
assert.commandFailedWithCode(
mongos.adminCommand({reshardCollection: ns, key: {b: 1}, numInitialChunks: 2}), 4952606);
assert.commandFailedWithCode(
st.s.adminCommand({reshardCollection: ns, key: {b: "hashed"}, numInitialChunks: 2}), 4952606);
jsTest.log(
"Fail if authoritative tags exist in config.tags collection and zones are not provided.");
const existingZoneName = 'x1';
assert.commandWorked(
st.s.adminCommand({addShardToZone: st.shard1.shardName, zone: existingZoneName}));
assert.commandWorked(st.s.adminCommand(
{updateZoneKeyRange: ns, min: {oldKey: 0}, max: {oldKey: 5}, zone: existingZoneName}));
assert.commandFailedWithCode(mongos.adminCommand({
reshardCollection: ns,
key: {newKey: 1},
unique: false,
collation: {locale: 'simple'},
numInitialChunks: 2,
}),
ErrorCodes.BadValue);
jsTestLog("Fail if attempting insert to an unsharded 'system.resharding.' collection");
assert.commandFailedWithCode(mongos.getDB('test').system.resharding.mycoll.insert({_id: 1, a: 1}),
ErrorCodes.NamespaceNotSharded);
/**
* Success cases
*/
mongos.getDB(kDbName)[collName].drop();
jsTest.log("Succeed when correct locale is provided.");
reshardCmdTest.assertReshardCollOk(
{reshardCollection: ns, key: {newKey: 1}, collation: {locale: 'simple'}}, 1);
jsTest.log("Succeed base case.");
reshardCmdTest.assertReshardCollOk({reshardCollection: ns, key: {newKey: 1}}, 1);
jsTest.log("Succeed if unique is specified and is false.");
reshardCmdTest.assertReshardCollOk({reshardCollection: ns, key: {newKey: 1}, unique: false}, 1);
jsTest.log(
"Succeed if _presetReshardedChunks is provided and test commands are enabled (default).");
reshardCmdTest.assertReshardCollOkWithPreset({reshardCollection: ns, key: {newKey: 1}},
presetReshardedChunks);
presetReshardedChunks = [
{recipientShardId: st.shard0.shardName, min: {newKey: MinKey}, max: {newKey: 0}},
{recipientShardId: st.shard1.shardName, min: {newKey: 0}, max: {newKey: MaxKey}}
];
jsTest.log("Succeed if all optional fields and numInitialChunks are provided with correct values.");
reshardCmdTest.assertReshardCollOk({
reshardCollection: ns,
key: {newKey: 1},
unique: false,
collation: {locale: 'simple'},
numInitialChunks: 2,
},
2);
jsTest.log(
"Succeed if all optional fields and _presetReshardedChunks are provided with correct values" +
" and test commands are enabled (default).");
reshardCmdTest.assertReshardCollOkWithPreset(
{reshardCollection: ns, key: {newKey: 1}, unique: false, collation: {locale: 'simple'}},
presetReshardedChunks);
jsTest.log("Succeed if the zone provided is assigned to a shard but not a range for the source" +
" collection.");
const newZoneName = 'x2';
assert.commandWorked(st.s.adminCommand({addShardToZone: st.shard1.shardName, zone: newZoneName}));
reshardCmdTest.assertReshardCollOk({
reshardCollection: ns,
key: {newKey: 1},
unique: false,
collation: {locale: 'simple'},
zones: [{zone: newZoneName, min: {newKey: 5}, max: {newKey: 10}}]
},
3);
jsTest.log("Succeed if resulting chunks all end up in one shard.");
reshardCmdTest.assertReshardCollOk({
reshardCollection: ns,
key: {newKey: 1},
unique: false,
numInitialChunks: 1,
collation: {locale: 'simple'},
zones: [{zone: newZoneName, min: {newKey: MinKey}, max: {newKey: MaxKey}}]
},
1);
jsTest.log("Succeed if zones are empty");
reshardCmdTest.assertReshardCollOk({
reshardCollection: ns,
key: {newKey: 1},
unique: false,
numInitialChunks: 1,
collation: {locale: 'simple'},
zones: []
},
1);
jsTest.log("Succeed if zones are not empty.");
assert.commandWorked(
mongos.adminCommand({addShardToZone: st.shard1.shardName, zone: existingZoneName}));
assert.commandWorked(st.s.adminCommand(
{updateZoneKeyRange: ns, min: {oldKey: 0}, max: {oldKey: 5}, zone: existingZoneName}));
reshardCmdTest.assertReshardCollOk({
reshardCollection: ns,
key: {oldKey: 1, newKey: 1},
unique: false,
collation: {locale: 'simple'},
zones: [{zone: existingZoneName, min: {oldKey: 0}, max: {oldKey: 5}}]
},
3);
jsTest.log("Succeed with hashed shard key that provides enough cardinality.");
assert.commandWorked(
mongos.adminCommand({shardCollection: ns, key: {a: "hashed"}, numInitialChunks: 5}));
assert.commandWorked(mongos.getCollection(ns).insert(
Array.from({length: 10000}, (_, i) => ({a: new ObjectId(), b: new ObjectId()}))));
assert.commandWorked(
st.s.adminCommand({reshardCollection: ns, key: {b: "hashed"}, numInitialChunks: 5}));
mongos.getDB(kDbName)[collName].drop();
st.stop();
})();
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