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/*
* Tests that we don't hit 3 way deadlock between hybrid index builder, prepared txn
* and step down thread.
*
* This test creates a scenario where:
* 1) Hybrid index build gets started and holds the RSTL lock in MODE_IX.
* 2) Transaction gets prepared and holds the collection lock in MODE_IX.
* 3) Step down enqueues RSTL in MODE_X, interrupts index build and waits for index
* builder to release RSTL lock.
* 4) Index build cleanup tries to acquire collection lock in MODE_X and blocked behind
* the prepared transaction due to collection lock conflict.
* 5) 'abortTransaction' cmd attempts to acquire the RSTL lock in MODE_IX but blocked
* behind the step down thread.
*
* @tags: [uses_transactions, uses_prepare_transaction]
*/
load("jstests/libs/check_log.js");
load("jstests/replsets/rslib.js");
load("jstests/core/txns/libs/prepare_helpers.js");
(function() {
"use strict";
const dbName = "test";
const collName = "coll";
const rst = new ReplSetTest({nodes: 1});
rst.startSet();
rst.initiate();
const primary = rst.getPrimary();
const primaryDB = primary.getDB(dbName);
const primaryColl = primaryDB[collName];
const collNss = primaryColl.getFullName();
TestData.dbName = dbName;
TestData.collName = collName;
jsTestLog("Do a document write");
assert.commandWorked(primaryColl.insert({_id: 1, x: 1}, {"writeConcern": {"w": 1}}));
// Clear the log.
assert.commandWorked(primary.adminCommand({clearLog: 'global'}));
// Enable fail point which makes hybrid index build to hang.
assert.commandWorked(primary.adminCommand(
{configureFailPoint: "hangAfterIndexBuildDumpsInsertsFromBulk", mode: "alwaysOn"}));
const indexThread = startParallelShell(() => {
jsTestLog("Create index");
const primaryDB = db.getSiblingDB(TestData.dbName);
assert.commandFailedWithCode(primaryDB[TestData.collName].createIndex({"x": 1}),
ErrorCodes.InterruptedDueToReplStateChange);
}, primary.port);
// Wait for hangAfterIndexBuildDumpsInsertsFromBulk fail point to reach.
checkLog.contains(primary, "Hanging after dumping inserts from bulk builder");
jsTestLog("Start txn");
const session = primary.startSession();
const sessionDB = session.getDatabase(dbName);
const sessionColl = sessionDB.getCollection(collName);
session.startTransaction();
assert.commandWorked(sessionColl.insert({x: 1}, {$set: {y: 1}}));
jsTestLog("Prepare txn");
const prepareTimestamp = PrepareHelpers.prepareTransaction(session);
const stepDownThread = startParallelShell(() => {
jsTestLog("Make primary to step down");
assert.commandWorked(db.adminCommand({"replSetStepDown": 60 * 60, "force": true}));
}, primary.port);
// Wait for step down to start the "RstlKillOpThread" thread.
checkLog.contains(primary, "Starting to kill user operations");
assert.commandWorked(primary.adminCommand(
{configureFailPoint: "hangAfterIndexBuildDumpsInsertsFromBulk", mode: "off"}));
// Wait for threads to join.
indexThread();
stepDownThread();
waitForState(primary, ReplSetTest.State.SECONDARY);
// Allow the primary to be re-elected, and wait for it.
assert.commandWorked(primary.adminCommand({replSetFreeze: 0}));
rst.getPrimary();
jsTestLog("Abort txn");
assert.commandWorked(session.abortTransaction_forTesting());
rst.stopSet();
})();
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