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/* Tests that dropping the oplog is forbidden on standalone nodes with storage engines
* that support the command "replSetResizeOplog". The support for this command is
* provided only by the WiredTiger storage engine.
* Therefore, attempts to drop the oplog when using these storage engines should fail.
* Also, nodes running in a replica set will forbid dropping the oplog, but
* for a different reason.
* Note: We detect whether a storage engine supports the replSetResizeOplog command
* by checking whether it supportsRecoveryTimestamp().
*
* @tags: [
* requires_persistence,
* # Multiversion testing is not supported for tests running ReplSetTest as standalones.
* multiversion_incompatible,
* ]
*/
(function() {
"use strict";
load("jstests/libs/storage_engine_utils.js");
// Start a standalone node.
let primary = MongoRunner.runMongod();
let localDB = primary.getDB('local');
// Standalone nodes don't start with an oplog; create one. The size of the oplog doesn't
// matter. We are capping the oplog because some storage engines do not allow the creation
// of uncapped oplog collections.
assert.commandWorked(localDB.runCommand({create: 'oplog.rs', capped: true, size: 1000}));
if (storageEngineIsWiredTiger()) {
const ret = assert.commandFailed(localDB.runCommand({drop: 'oplog.rs'}));
assert.eq("can't drop oplog on storage engines that support replSetResizeOplog command",
ret.errmsg);
} else {
assert.commandWorked(localDB.runCommand({drop: 'oplog.rs'}));
}
MongoRunner.stopMongod(primary);
}());
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