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/**
* Tests that in tenant migration, the recipient set can resume collection cloning from the last
* document cloned after a failover even if the collection has been renamed on the donor.
* @tags: [requires_majority_read_concern, requires_fcv_49, incompatible_with_windows_tls]
*/
(function() {
"use strict";
load("jstests/libs/fail_point_util.js");
load("jstests/libs/uuid_util.js"); // for 'extractUUIDFromObject'
load("jstests/libs/parallelTester.js"); // for 'Thread'
load("jstests/replsets/libs/tenant_migration_test.js");
load("jstests/replsets/libs/tenant_migration_util.js");
const recipientRst = new ReplSetTest({
nodes: 2,
name: jsTestName() + "_recipient",
// Use a batch size of 2 so that collection cloner requires more than a single batch to
// complete.
nodeOptions: Object.assign(TenantMigrationUtil.makeX509OptionsForTest().recipient,
{setParameter: {collectionClonerBatchSize: 2}})
});
recipientRst.startSet();
recipientRst.initiate();
if (!TenantMigrationUtil.isFeatureFlagEnabled(recipientRst.getPrimary())) {
jsTestLog("Skipping test because the tenant migrations feature flag is disabled");
recipientRst.stopSet();
return;
}
const tenantMigrationTest =
new TenantMigrationTest({name: jsTestName(), recipientRst: recipientRst});
const tenantId = "testTenantId";
const dbName = tenantMigrationTest.tenantDB(tenantId, "testDB");
const collName = "testColl";
const recipientPrimary = tenantMigrationTest.getRecipientPrimary();
const donorPrimary = tenantMigrationTest.getDonorPrimary();
// Test _id with mixed bson types.
const docs = [{_id: 0}, {_id: "string"}, {_id: UUID()}, {_id: new Date()}];
tenantMigrationTest.insertDonorDB(dbName, collName, docs);
const migrationId = UUID();
const migrationIdString = extractUUIDFromObject(migrationId);
const migrationOpts = {
migrationIdString: migrationIdString,
recipientConnString: tenantMigrationTest.getRecipientConnString(),
tenantId: tenantId,
};
// Configure a fail point to have the recipient primary hang after cloning 2 documents.
const recipientDb = recipientPrimary.getDB(dbName);
let recipientColl = recipientDb.getCollection(collName);
const hangDuringCollectionClone =
configureFailPoint(recipientDb,
"tenantMigrationHangCollectionClonerAfterHandlingBatchResponse",
{nss: recipientColl.getFullName()});
// Start a migration and wait for recipient to hang after cloning 2 documents.
const donorRstArgs = TenantMigrationUtil.createRstArgs(tenantMigrationTest.getDonorRst());
const migrationThread =
new Thread(TenantMigrationUtil.runMigrationAsync, migrationOpts, donorRstArgs);
migrationThread.start();
hangDuringCollectionClone.wait();
assert.soon(() => recipientColl.find().itcount() === 2);
// Insert some documents that will be fetched by the recipient. This is to test that on failover,
// the fetcher will resume fetching from where it left off. The system is expected to crash if
// the recipient fetches a duplicate oplog entry upon resuming the migration.
tenantMigrationTest.insertDonorDB(dbName, "aNewColl", [{_id: "docToBeFetched"}]);
assert.soon(() => {
const configDb = recipientPrimary.getDB("config");
const oplogBuffer = configDb.getCollection("repl.migration.oplog_" + migrationIdString);
return oplogBuffer.find({"entry.o._id": "docToBeFetched"}).count() === 1;
});
// Step up a new node in the recipient set and trigger a failover. The new primary should resume
// cloning starting from the third document.
recipientRst.awaitLastOpCommitted();
const newRecipientPrimary = recipientRst.getSecondaries()[0];
const newRecipientDb = newRecipientPrimary.getDB(dbName);
assert.commandWorked(newRecipientPrimary.adminCommand({replSetStepUp: 1}));
hangDuringCollectionClone.off();
recipientRst.getPrimary();
// Rename the collection on the donor.
const donorColl = donorPrimary.getDB(dbName).getCollection(collName);
const collNameRenamed = collName + "_renamed";
assert.commandWorked(donorColl.renameCollection(collNameRenamed));
// The migration should go through after recipient failover.
assert.commandWorked(migrationThread.returnData());
// Check that recipient has cloned all documents in the renamed collection.
recipientColl = newRecipientPrimary.getDB(dbName).getCollection(collNameRenamed);
assert.eq(4, recipientColl.find().itcount());
assert.eq(recipientColl.find().sort({_id: 1}).toArray(), docs);
tenantMigrationTest.checkTenantDBHashes(tenantId);
tenantMigrationTest.stop();
recipientRst.stopSet();
})();
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