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109 lines
4.2 KiB
JavaScript
109 lines
4.2 KiB
JavaScript
/**
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* Test that rollback can successfully roll back an aborted prepared transaction.
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* Also test that it is impossible to commit a prepared transaction whose prepare oplog entry has
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* not yet been majority committed. This case should never happen when prepareTransaction is driven
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* by the transaction coordinator because transaction coordinator should always call
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* prepareTransaction with {w : "majority"}.
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*
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* @tags: [uses_transactions, uses_prepare_transaction]
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*/
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(function() {
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"use strict";
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load("jstests/core/txns/libs/prepare_helpers.js");
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load("jstests/replsets/libs/rollback_test.js");
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const dbName = "test";
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const collName = "rollback_aborted_prepared_transaction";
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const rollbackTest = new RollbackTest(dbName);
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let primary = rollbackTest.getPrimary();
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// Create collection we're using beforehand.
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let testDB = primary.getDB(dbName);
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let testColl = testDB.getCollection(collName);
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testDB.runCommand({drop: collName});
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assert.commandWorked(testDB.runCommand({create: collName}));
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assert.commandWorked(testColl.insert({_id: 0}));
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// Start two sessions on the primary.
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let session = primary.startSession();
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const sessionID = session.getSessionId();
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let sessionDB = session.getDatabase(dbName);
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let sessionColl = sessionDB.getCollection(collName);
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let session2 = primary.startSession();
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let sessionColl2 = session2.getDatabase(dbName).getCollection(collName);
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// The following transaction will be rolled back.
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rollbackTest.transitionToRollbackOperations();
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// Prepare the transaction on the session.
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session.startTransaction();
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assert.commandWorked(sessionColl.insert({_id: 1}));
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PrepareHelpers.prepareTransaction(session, {w: 1});
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assert.eq(testColl.find().itcount(), 1);
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// This characterizes the current fastcount behavior, which is that active prepared transactions
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// contribute to the fastcount.
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assert.eq(testColl.count(), 2);
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// Abort the transaction explicitly.
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assert.commandWorked(session.abortTransaction_forTesting());
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assert.eq(testColl.find().itcount(), 1);
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assert.eq(testColl.count(), 1);
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// Test that it is impossible to commit a prepared transaction whose prepare oplog entry has not
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// yet majority committed. This also aborts the transaction.
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session2.startTransaction();
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assert.commandWorked(sessionColl2.insert({_id: 2}));
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let prepareTimestamp = PrepareHelpers.prepareTransaction(session2, {w: 1});
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let res = assert.commandFailedWithCode(PrepareHelpers.commitTransaction(session2, prepareTimestamp),
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ErrorCodes.InvalidOptions);
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assert(
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res.errmsg.includes("cannot be run before its prepare oplog entry has been majority committed"),
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res);
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assert.eq(testColl.find().itcount(), 1);
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assert.eq(testColl.count(), 1);
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// Check that we have two transactions in the transactions table.
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assert.eq(primary.getDB('config')['transactions'].find().itcount(), 2);
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rollbackTest.transitionToSyncSourceOperationsBeforeRollback();
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rollbackTest.transitionToSyncSourceOperationsDuringRollback();
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rollbackTest.transitionToSteadyStateOperations();
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// Make sure there are no transactions in the transactions table. This is because both the abort
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// and prepare operations are rolled back, and the entry in the transactions table is only made
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// durable when a transaction is prepared.
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assert.eq(primary.getDB('config')['transactions'].find().itcount(), 0);
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// Make sure the first collection only has one document since the prepared insert was rolled
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// back.
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assert.eq(sessionColl.find().itcount(), 1);
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assert.eq(sessionColl.count(), 1);
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// Get the new primary after the topology changes.
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primary = rollbackTest.getPrimary();
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testDB = primary.getDB(dbName);
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testColl = testDB.getCollection(collName);
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// Make sure we can successfully run a prepared transaction on the same session after going
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// through rollback.
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session = PrepareHelpers.createSessionWithGivenId(primary, sessionID);
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sessionDB = session.getDatabase(dbName);
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sessionColl = sessionDB.getCollection(collName);
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session.startTransaction();
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assert.commandWorked(sessionColl.insert({_id: 1}));
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prepareTimestamp = PrepareHelpers.prepareTransaction(session);
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PrepareHelpers.commitTransaction(session, prepareTimestamp);
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assert.eq(testColl.find().itcount(), 2);
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assert.eq(testColl.count(), 2);
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rollbackTest.stop();
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}());
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