/** * Tests that an incompatible shard key index can't be the only shard key index on a sharded * collection. * * @tags: [ * requires_fcv_70, * ] */ (function() { "use strict" ; const shardKeyPattern = { skey: 1, }; const st = new ShardingTest({shards: 1}); const coll = st.s.getDB( "test" ).coll; function getIndexByKey(keyPattern) { const indexes = coll.getIndexes().filter((index) => friendlyEqual(index.key, keyPattern)); assert .lte( indexes.length, 1, `Found multiple indexes matching key pattern ${tojsononeline(keyPattern)}. Index list: ${ tojson(indexes)}`, ); assert .eq( indexes.length, 1, `Index ${tojsononeline(keyPattern)} not found.`, ); return indexes.pop(); } const incompatibleShardKeyIndex = { key: {skey: 1, multiKeyField: 1}, options: {}, isMultiKey: true , }; { jsTestLog( "Verify reshardCollection will attempt to create a shard key index" ); // Insert a document that will make the index on 'multiKeyField' multikey. coll.insert({skey: 22, multiKeyField: [1, 2, 3]}); // Create the incompatible index. assert .commandWorked( coll.createIndex(incompatibleShardKeyIndex.key, incompatibleShardKeyIndex.options), ); // Shard the collection first with shard key {_id: 1}. assert .commandWorked( st.s.adminCommand({shardCollection: coll.getFullName(), key: { "_id" : 1}}), ); // Attempt to reshard the collection to shard key 'shardKeyPattern' . const res = st.s.adminCommand({ reshardCollection: coll.getFullName(), key: shardKeyPattern, numInitialChunks: 1, }); assert .commandWorkedOrFailedWithCode(res, [ ErrorCodes.InvalidOptions, ErrorCodes.IndexKeySpecsConflict, ]); if (res.ok) { // The reshardCollection command succeeded, check that the shard key index was // created and it's not the incompatible index. assert ( incompatibleShardKeyIndex.canCoexistWithShardKeyIndex, "reshardCollection succeeded when it should have failed" , ); const shardKeyIndex = getIndexByKey(shardKeyPattern); const incompatibleIndex = getIndexByKey(incompatibleShardKeyIndex.key); assert .neq(shardKeyIndex, null , "shard key index was not created" ); assert .neq(incompatibleIndex, null , "incompatible index is missing" ); assert .neq( incompatibleIndex, shardKeyIndex, "shard key index mustn't be the incompatible index" ); } } st.stop(); })();