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/**
* Tests that the dbHash command acquires IX mode locks on the global, database, and collection
* resources when running inside a multi-statement transaction.
*/
(function() {
"use strict";
const rst = new ReplSetTest({nodes: 1});
rst.startSet();
rst.initiate();
const primary = rst.getPrimary();
const db = primary.getDB("test");
if (!db.serverStatus().storageEngine.supportsSnapshotReadConcern) {
rst.stopSet();
return;
}
const session = primary.startSession({causalConsistency: false});
const sessionDB = session.getDatabase(db.getName());
function assertTransactionAcquiresIXLocks(txnOptions) {
session.startTransaction(txnOptions);
assert.commandWorked(sessionDB.runCommand({dbHash: 1}));
const ops = db.currentOp({"lsid.id": session.getSessionId().id}).inprog;
assert.eq(1,
ops.length,
() => "Failed to find session in currentOp() output: " + tojson(db.currentOp()));
assert.eq(ops[0].locks, {Global: "w", Database: "w", Collection: "w"});
session.abortTransaction();
}
// We insert a document so the dbHash command has a collection to process.
assert.commandWorked(db.mycoll.insert({}, {writeConcern: {w: "majority"}}));
assertTransactionAcquiresIXLocks({});
assertTransactionAcquiresIXLocks({readConcern: {level: "local"}});
assertTransactionAcquiresIXLocks({readConcern: {level: "snapshot"}});
assertTransactionAcquiresIXLocks({
readConcern: {
level: "snapshot",
atClusterTime: session.getOperationTime(),
}
});
session.endSession();
rst.stopSet();
})();
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