/**
 * Tests a race condition between a user interrupting an index build and the node stepping-down. The
 * nature of this problem is that the stepping-down node is not able to replicate an abortIndexBuild
 * oplog entry after the user kills the operation. The old primary will rely on the new primary to
 * replicate a commitIndexBuild oplog entry after the takeover.
 *
 * @tags: [
 *   requires_replication,
 * ]
 */
(function() {
"use strict";

load('jstests/noPassthrough/libs/index_build.js');
load("jstests/libs/fail_point_util.js");

const rst = new ReplSetTest({
    nodes: [
        {},
        {},
    ]
});
const nodes = rst.startSet();
rst.initiate();

const primary = rst.getPrimary();
const testDB = primary.getDB('test');
const coll = testDB.getCollection('test');

assert.commandWorked(coll.insert({a: 1}));

let res = assert.commandWorked(primary.adminCommand(
    {configureFailPoint: 'hangAfterInitializingIndexBuild', mode: 'alwaysOn'}));
const hangAfterInitFailpointTimesEntered = res.count;

res = assert.commandWorked(primary.adminCommand(
    {configureFailPoint: 'hangBeforeIndexBuildAbortOnInterrupt', mode: 'alwaysOn'}));
const hangBeforeAbortFailpointTimesEntered = res.count;

const createIdx = IndexBuildTest.startIndexBuild(primary, coll.getFullName(), {a: 1});

try {
    assert.commandWorked(primary.adminCommand({
        waitForFailPoint: "hangAfterInitializingIndexBuild",
        timesEntered: hangAfterInitFailpointTimesEntered + 1,
        maxTimeMS: kDefaultWaitForFailPointTimeout
    }));

    // When the index build starts, find its op id. This will be the op id of the client
    // connection, not the thread pool task managed by IndexBuildsCoordinatorMongod.
    const filter = {"desc": {$regex: /conn.*/}};
    const opId = IndexBuildTest.waitForIndexBuildToStart(testDB, coll.getName(), 'a_1', filter);

    // Kill the index build.
    assert.commandWorked(testDB.killOp(opId));

    // Let the index build continue running.
    assert.commandWorked(
        primary.adminCommand({configureFailPoint: 'hangAfterInitializingIndexBuild', mode: 'off'}));

    // Wait for the command thread to abort the index build.
    assert.commandWorked(primary.adminCommand({
        waitForFailPoint: "hangBeforeIndexBuildAbortOnInterrupt",
        timesEntered: hangBeforeAbortFailpointTimesEntered + 1,
        maxTimeMS: kDefaultWaitForFailPointTimeout
    }));

    // Step down the primary, preventing the index build from generating an abort oplog entry.
    assert.commandWorked(testDB.adminCommand({replSetStepDown: 30, force: true}));
} finally {
    assert.commandWorked(
        primary.adminCommand({configureFailPoint: 'hangAfterInitializingIndexBuild', mode: 'off'}));
    // Let the index build finish cleaning up.
    assert.commandWorked(primary.adminCommand(
        {configureFailPoint: 'hangBeforeIndexBuildAbortOnInterrupt', mode: 'off'}));
}

const exitCode = createIdx({checkExitSuccess: false});
assert.neq(0, exitCode, 'expected shell to exit abnormally due to index build being terminated');

// Wait for the index build to stop.
IndexBuildTest.waitForIndexBuildToStop(testDB);

// With two phase index builds, a stepdown will not abort the index build, which should complete
// after a new node becomes primary.
rst.awaitReplication();

// The old primary, now secondary, should process the commitIndexBuild oplog entry.

const secondaryColl = rst.getSecondary().getCollection(coll.getFullName());
IndexBuildTest.assertIndexes(coll, 2, ['_id_', 'a_1'], [], {includeBuildUUIDs: true});
IndexBuildTest.assertIndexes(secondaryColl, 2, ['_id_', 'a_1'], [], {includeBuildUUIDs: true});

rst.stopSet();
})();