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/*
* Tests that WT_ROLLBACK (WriteConflictException) error gets retried when applying
* prepareTransaction oplog entry on secondaries.
*
* @tags: [uses_transactions, uses_prepare_transaction]
*/
(function() {
"use strict";
load("jstests/core/txns/libs/prepare_helpers.js");
const dbName = jsTest.name();
const collName = "coll";
var rst = new ReplSetTest({nodes: [{}, {rsConfig: {priority: 0}}]});
rst.startSet();
rst.initiate();
const primary = rst.getPrimary();
const secondary = rst.getSecondary();
const primaryDB = primary.getDB(dbName);
const primaryColl = primaryDB[collName];
jsTestLog("Do a document write");
assert.commandWorked(
primaryColl.insert({_id: 0}, {"writeConcern": {"w": "majority"}}));
// Enable fail point on secondary to cause apply prepare transaction oplog entry's ops to fail
// with write conflict error at least once.
assert.commandWorked(secondary.adminCommand(
{configureFailPoint: "applyPrepareTxnOpsFailsWithWriteConflict", mode: {times: 1}}));
jsTestLog("Start transaction");
let session = primary.startSession();
let sessionDB = session.getDatabase(dbName);
const sessionColl = sessionDB.getCollection(collName);
session.startTransaction({writeConcern: {w: "majority"}});
assert.commandWorked(sessionColl.insert({_id: 1}));
// PrepareTransaction cmd will be successful only if secondary is able to retry applying
// prepareTransaction oplog entry on WT_ROLLBACK (WriteConflictException) error.
jsTestLog("Prepare transaction");
let prepareTimestamp = PrepareHelpers.prepareTransaction(session);
jsTestLog("Commit transaction");
assert.commandWorked(PrepareHelpers.commitTransaction(session, prepareTimestamp));
// Verify that the committed transaction data is present on secondary.
assert.eq(secondary.getDB(dbName)[collName].findOne({_id: 1}), {_id: 1});
// verify that secondaries are not holding any transactional lock resources.
primaryColl.drop();
rst.awaitReplication();
rst.stopSet();
})();
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