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/* Tests parallel transactions with createCollections.
*
* @tags: [uses_transactions,
* # Creating collections inside multi-document transactions is supported only in v4.4
* # onwards.
* requires_fcv_44]
*/
(function() {
"use strict";
load("jstests/libs/create_collection_txn_helpers.js");
const dbName = "test";
const collName = "create_new_collection";
const distinctCollName = collName + "_second";
const session = db.getMongo().getDB(dbName).getMongo().startSession({causalConsistency: false});
const secondSession =
db.getMongo().getDB(dbName).getMongo().startSession({causalConsistency: false});
let sessionDB = session.getDatabase("test");
let secondSessionDB = secondSession.getDatabase("test");
let sessionColl = sessionDB[collName];
sessionColl.drop({writeConcern: {w: "majority"}});
let distinctSessionColl = sessionDB[distinctCollName];
distinctSessionColl.drop({writeConcern: {w: "majority"}});
jsTest.log("Testing duplicate createCollections, second createCollection fails");
session.startTransaction({writeConcern: {w: "majority"}}); // txn 1
secondSession.startTransaction({writeConcern: {w: "majority"}}); // txn 2
createCollAndCRUDInTxn(sessionDB, collName);
jsTest.log("Committing transaction 1");
session.commitTransaction();
assert.eq(sessionColl.find({}).itcount(), 1);
assert.commandFailedWithCode(secondSessionDB.runCommand({create: collName}),
ErrorCodes.NamespaceExists);
assert.commandFailedWithCode(secondSession.abortTransaction_forTesting(),
ErrorCodes.NoSuchTransaction);
sessionColl.drop({writeConcern: {w: "majority"}});
jsTest.log(
"Testing duplicate createCollections in parallel, both attempt to commit, second to commit fails");
secondSession.startTransaction({writeConcern: {w: "majority"}}); // txn 2
createCollAndCRUDInTxn(secondSession.getDatabase("test"), collName);
session.startTransaction({writeConcern: {w: "majority"}}); // txn 1
createCollAndCRUDInTxn(sessionDB, collName);
jsTest.log("Committing transaction 2");
secondSession.commitTransaction();
jsTest.log("Committing transaction 1 (SHOULD FAIL)");
assert.commandFailedWithCode(session.commitTransaction_forTesting(), ErrorCodes.WriteConflict);
assert.eq(sessionColl.find({}).itcount(), 1);
sessionColl.drop({writeConcern: {w: "majority"}});
distinctSessionColl.drop({writeConcern: {w: "majority"}});
jsTest.log("Testing distinct createCollections in parallel, both successfully commit.");
session.startTransaction({writeConcern: {w: "majority"}}); // txn 1
createCollAndCRUDInTxn(sessionDB, collName);
secondSession.startTransaction({writeConcern: {w: "majority"}}); // txn 2
createCollAndCRUDInTxn(secondSessionDB, distinctCollName);
session.commitTransaction();
secondSession.commitTransaction();
secondSession.endSession();
session.endSession();
}());
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