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/**
* Tests that a shard split handles change collections.
* @tags: [requires_fcv_63, serverless]
*/
import {assertMigrationState, ShardSplitTest} from "jstests/serverless/libs/shard_split_test.js";
load("jstests/libs/fail_point_util.js");
load("jstests/serverless/libs/change_collection_util.js");
const tenantIds = [ObjectId(), ObjectId()];
const donorRst = new ChangeStreamMultitenantReplicaSetTest({
nodes: 3,
nodeOptions: {
setParameter: {
shardSplitGarbageCollectionDelayMS: 0,
ttlMonitorSleepSecs: 1,
shardSplitTimeoutMS: 100000
}
}
});
const test = new ShardSplitTest({quickGarbageCollection: true, donorRst});
test.addRecipientNodes();
test.donor.awaitSecondaryNodes();
const donorPrimary = test.getDonorPrimary();
const donorTenantConn =
ChangeStreamMultitenantReplicaSetTest.getTenantConnection(donorPrimary.host, tenantIds[0]);
test.donor.setChangeStreamState(donorTenantConn, true);
const donorNonMovingTenantConn =
ChangeStreamMultitenantReplicaSetTest.getTenantConnection(donorPrimary.host, ObjectId());
test.donor.setChangeStreamState(donorNonMovingTenantConn, true);
const donorNonMovingCursor = donorNonMovingTenantConn.getDB("database").collection.watch();
// Open a change stream and insert documents into database.collection before the split
// starts.
const donorCursor = donorTenantConn.getDB("database").collection.watch([]);
const insertedDocs = [{_id: "tenant1_1"}, {_id: "tenant1_2"}, {_id: "tenant1_3"}];
donorTenantConn.getDB("database").collection.insertMany(insertedDocs);
// Start up a cursor to check if we can getMore after the tenant has been migrated and change
// collection is dropped.
const donorCursor2 = donorTenantConn.getDB("database").collection.watch([]);
const donorTenantSession = donorTenantConn.startSession({retryWrites: true});
const donorTenantSessionCollection = donorTenantSession.getDatabase("database").collection;
assert.commandWorked(donorTenantSessionCollection.insert({_id: "tenant1_4", w: "RETRYABLE"}));
assert.commandWorked(donorTenantSession.getDatabase("database").runCommand({
findAndModify: "collection",
query: {_id: "tenant1_4"},
update: {$set: {updated: true}}
}));
// Start a transaction and perform some writes.
const donorTxnSession = donorTenantConn.getDB("database").getMongo().startSession();
donorTxnSession.startTransaction();
donorTxnSession.getDatabase("database").collection.insertOne({_id: "tenant1_in_transaction_1"});
donorTxnSession.getDatabase("database").collection.updateOne({_id: "tenant1_in_transaction_1"}, {
$set: {updated: true}
});
donorTxnSession.commitTransaction();
donorTxnSession.endSession();
// Get the first entry from the change stream cursor and grab the resume token.
assert.eq(donorCursor.hasNext(), true);
const {_id: resumeToken} = donorCursor.next();
// Set this break point so that we can run commands against the primary when the split operation
// enters a blocking state.
const blockingFp = configureFailPoint(donorPrimary, "pauseShardSplitAfterBlocking");
const operation = test.createSplitOperation(tenantIds);
const splitThread = operation.commitAsync();
// Wait for the split to enter the blocking state.
blockingFp.wait();
assert.commandFailedWithCode(
donorTenantConn.getDB("database").runCommand({
aggregate: "collection",
cursor: {},
pipeline: [{$changeStream: {}}],
// Timeout set higher than 1000ms to make sure its actually blocked and not just waiting for
// inserts, since change streams are awaitdata cursors.
maxTimeMS: 2 * 1000
}),
ErrorCodes.MaxTimeMSExpired,
"Opening new change streams should block while a split operation is in a blocking state");
blockingFp.off();
splitThread.join();
assert.commandWorked(splitThread.returnData());
assertMigrationState(donorPrimary, operation.migrationId, "committed");
// Test that we cannot open a new change stream after the tenant has been migrated.
assert.commandFailedWithCode(
donorTenantConn.getDB("database")
.runCommand({aggregate: "collection", cursor: {}, pipeline: [{$changeStream: {}}]}),
ErrorCodes.TenantMigrationCommitted,
"Opening a change stream on the donor after completion of a shard split should fail.");
// Test change stream cursor behavior on the donor for a tenant which was migrated, and for one
// which remains on the donor.
assert.commandWorked(
donorNonMovingTenantConn.getDB("database")
.runCommand("getMore", {getMore: donorNonMovingCursor._cursorid, collection: "collection"}),
"Tailing a change stream for a tenant that wasn't moved by a split" +
"should not be blocked after the split was committed");
// Test that running a getMore on a change stream cursor after the migration commits throws a
// resumable change stream exception.
const failedGetMore = donorTenantConn.getDB("database").runCommand("getMore", {
getMore: donorCursor._cursorid,
collection: "collection"
});
assert.commandFailedWithCode(
failedGetMore,
ErrorCodes.ResumeTenantChangeStream,
"Tailing a change stream on the donor after completion of a shard split should fail.");
assert(failedGetMore.hasOwnProperty("errorLabels"));
assert.contains("ResumableChangeStreamError", failedGetMore.errorLabels);
// The cursor should have been deleted after the error so a getMore should fail.
assert.commandFailedWithCode(
donorTenantConn.getDB("database")
.runCommand("getMore", {getMore: donorCursor._cursorid, collection: "collection"}),
ErrorCodes.CursorNotFound);
operation.forget();
const recipientRst = test.getRecipient();
const recipientPrimary = recipientRst.getPrimary();
const recipientPrimaryTenantConn = ChangeStreamMultitenantReplicaSetTest.getTenantConnection(
recipientPrimary.host, tenantIds[0], tenantIds[0].str);
// Running ChangeStreamMultitenantReplicaSetTest.getTenantConnection will create a user on the
// primary. Await replication so that we can use the same user on secondaries.
recipientRst.awaitReplication();
const recipientSecondaryConns = recipientRst.getSecondaries().map(
node => ChangeStreamMultitenantReplicaSetTest.getTenantConnection(
node.host, tenantIds[0], tenantIds[0].str));
// Resume the change stream on all Recipient nodes.
const cursors = [recipientPrimaryTenantConn, ...recipientSecondaryConns].map(
conn => conn.getDB("database").collection.watch([], {resumeAfter: resumeToken}));
[{_id: "tenant1_2", operationType: "insert"},
{_id: "tenant1_3", operationType: "insert"},
{_id: "tenant1_4", operationType: "insert"},
{_id: "tenant1_4", operationType: "update"},
{_id: "tenant1_in_transaction_1", operationType: "insert"},
{_id: "tenant1_in_transaction_1", operationType: "update"},
].forEach(expectedEvent => {
cursors.forEach(cursor => {
assert.soon(() => cursor.hasNext());
const changeEvent = cursor.next();
assert.eq(changeEvent.documentKey._id, expectedEvent._id);
assert.eq(changeEvent.operationType, expectedEvent.operationType);
});
});
test.cleanupSuccesfulCommitted(operation.migrationId, tenantIds);
// getMore cursor to check if we can getMore after the database is dropped.
donorTenantSession.getDatabase("config")["system.change_collection"].drop();
assert.commandFailedWithCode(
donorTenantConn.getDB("database")
.runCommand("getMore", {getMore: donorCursor2._cursorid, collection: "collection"}),
ErrorCodes.QueryPlanKilled);
test.stop();
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