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/**
* Ensures that replicating the dropDatabase oplog entry and clearing the collection catalog during
* dropDatabase is done atomically. This prevents a problem where we step down after writing out the
* dropDatabase oplog entry, the node becomes a secondary with the collection catalog still
* containing the database name. If the new primary creates the same database name with a different
* casing, the secondary would fatally assert.
*/
(function() {
"use strict";
load("jstests/libs/fail_point_util.js");
const rst = new ReplSetTest({nodes: 3});
rst.startSet();
rst.initiateWithHighElectionTimeout();
let primary = rst.getPrimary();
assert.commandWorked(primary.getDB("test").createCollection("a"));
let awaitDrop = startParallelShell(() => {
db.getSiblingDB("test").dropDatabase();
}, primary.port);
let awaitFailPoint = configureFailPoint(primary, "dropDatabaseHangBeforeInMemoryDrop");
awaitFailPoint.wait();
// Wait for secondaries to apply the dropDatabase oplog entry.
rst.awaitReplication();
// Make the primary step down before finishing dropDatabase.
assert.commandWorked(primary.getDB("admin").adminCommand({replSetStepDown: 30}));
awaitFailPoint.off();
awaitDrop();
assert.commandFailedWithCode(rst.getPrimary().getDB("TEST").createCollection("a"),
ErrorCodes.DatabaseDifferCase);
rst.stopSet();
})();
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