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/**
* If a user attempts to downgrade the server while there is an index build in progress, the
* downgrade should succeed without blocking.
* @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.commandWorked(coll.insert({a: 1}));
IndexBuildTest.pauseIndexBuilds(primary);
const createIdx = IndexBuildTest.startIndexBuild(primary, coll.getFullName(), {a: 1});
IndexBuildTest.waitForIndexBuildToScanCollection(testDB, coll.getName(), 'a_1');
// Downgrade the primary using the setFeatureCompatibilityVersion command.
try {
assert.commandWorked(primary.adminCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
} finally {
IndexBuildTest.resumeIndexBuilds(primary);
}
IndexBuildTest.waitForIndexBuildToStop(testDB);
createIdx();
IndexBuildTest.assertIndexes(coll, 2, ['_id_', 'a_1']);
// This confirms that the downgrade command will complete successfully after the index build has
// completed.
assert.commandWorked(primary.adminCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
rst.stopSet();
})();
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