mongodb/jstests/noPassthrough/index_stepdown_during_scan.js

/**
 * Confirms that background index builds on a primary are aborted when the node steps down during
 * the collection scan phase.
 * @tags: [requires_replication]
 */
(function() {
    "use strict";

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

    const rst = new ReplSetTest({
        nodes: [
            {},
            {
              // Disallow elections on secondary.
              rsConfig: {
                  priority: 0,
                  votes: 0,
              },
            },
        ]
    });
    const nodes = rst.startSet();
    rst.initiate();

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

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

    IndexBuildTest.pauseIndexBuilds(primary);

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

    // When the index build starts, find its op id.
    const opId = IndexBuildTest.waitForIndexBuildToScanCollection(testDB, coll.getName(), 'a_1');

    IndexBuildTest.assertIndexBuildCurrentOpContents(testDB, opId);

    try {
        // Step down the primary.
        assert.commandWorked(primary.adminCommand({replSetStepDown: 60, force: true}));
    } finally {
        IndexBuildTest.resumeIndexBuilds(primary);
    }

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

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

    // Check that no new index has been created.  This verifies that the index build was aborted
    // rather than successfully completed.
    IndexBuildTest.assertIndexes(coll, 1, ['_id_']);

    rst.stopSet();
})();