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/**
* Tests that unrecoverable errors during resharding's collection cloning are handled by the
* recipient.
*
* @tags: [
* uses_atclustertime
* ]
*/
(function() {
"use strict";
load("jstests/sharding/libs/resharding_test_fixture.js");
const reshardingTest = new ReshardingTest({numDonors: 2, numRecipients: 1});
reshardingTest.setup();
const donorShardNames = reshardingTest.donorShardNames;
const inputCollection = reshardingTest.createShardedCollection({
ns: "reshardingDb.coll",
shardKeyPattern: {oldKey: 1},
chunks: [
{min: {oldKey: MinKey}, max: {oldKey: 0}, shard: donorShardNames[0]},
{min: {oldKey: 0}, max: {oldKey: MaxKey}, shard: donorShardNames[1]},
],
});
// The following documents violate the global _id uniqueness assumption of sharded collections. It
// is possible to construct such a sharded collection due to how each shard independently enforces
// the uniqueness of _id values for only the documents it owns. The resharding operation is expected
// to abort upon discovering this violation.
assert.commandWorked(inputCollection.insert([
{_id: 0, info: `moves from ${donorShardNames[0]}`, oldKey: -10, newKey: -10},
{_id: 0, info: `moves from ${donorShardNames[1]}`, oldKey: 10, newKey: 10},
]));
// The collection is cloned in ascending _id order so we insert some large documents with higher _id
// values to guarantee there will be a cursor needing to be cleaned up on the donor shards after
// cloning errors.
const largeStr = "x".repeat(9 * 1024 * 1024);
assert.commandWorked(inputCollection.insert([
{_id: 10, info: `moves from ${donorShardNames[0]}`, oldKey: -10, newKey: -10, pad: largeStr},
{_id: 11, info: `moves from ${donorShardNames[0]}`, oldKey: -10, newKey: -10, pad: largeStr},
{_id: 20, info: `moves from ${donorShardNames[1]}`, oldKey: 10, newKey: 10, pad: largeStr},
{_id: 21, info: `moves from ${donorShardNames[1]}`, oldKey: 10, newKey: 10, pad: largeStr},
]));
const mongos = inputCollection.getMongo();
const recipientShardNames = reshardingTest.recipientShardNames;
reshardingTest.withReshardingInBackground({
newShardKeyPattern: {newKey: 1},
newChunks: [{min: {newKey: MinKey}, max: {newKey: MaxKey}, shard: recipientShardNames[0]}],
},
() => {},
{expectedErrorCode: ErrorCodes.DuplicateKey});
const idleCursors = mongos.getDB("admin")
.aggregate([
{$currentOp: {allUsers: true, idleCursors: true}},
{$match: {type: "idleCursor", ns: inputCollection.getFullName()}},
])
.toArray();
assert.eq([], idleCursors, "expected cloning cursors to be cleaned up, but they weren't");
reshardingTest.teardown();
})();
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