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/**
* Test that attempting to call getParameter on the featureCompatibilityVersion before the fCV is
* initialized does not crash the server (see SERVER-34600).
*
* This tests behavior dependent on a specific FCV.
* @tags: [multiversion_incompatible]
*/
(function() {
'use strict';
let rst = new ReplSetTest({nodes: 2});
rst.startSet();
let node = rst.nodes[0];
// The featureCompatibilityVersion parameter is initialized during rst.initiate(), so calling
// getParameter on the fCV before then will attempt to access an uninitialized fCV.
const getParamCmd = {
getParameter: 1,
featureCompatibilityVersion: 1
};
assert.commandFailedWithCode(
node.getDB('admin').runCommand(getParamCmd),
ErrorCodes.UnknownFeatureCompatibilityVersion,
'expected ' + tojson(getParamCmd) + ' to fail with code UnknownFeatureCompatibilityVersion');
rst.initiate();
// After the replica set is initialized, getParameter should successfully return the fCV.
const primary = rst.getPrimary();
const res = primary.adminCommand(getParamCmd);
assert.commandWorked(res);
assert.eq(res.featureCompatibilityVersion.version, latestFCV, tojson(res));
rst.stopSet();
})();
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