Run this noPassthrough jstest. /** * @tags: [ * requires_replication, * ] */ (function() { 'use strict'; const replTest = new ReplSetTest({nodes: 2}); replTest.startSet(); replTest.initiate(); const primary = replTest.getPrimary(); const db = primary.getDB('test'); assert.commandWorked(db['c'].insertOne({_id: 5, num: 0})); const s0 = db.getMongo().startSession(); s0.startTransaction(); assert.commandWorked(s0.getDatabase('test')['c'].deleteOne({_id: 5})); s0.commitTransaction(); const clusterTime = s0.getClusterTime().clusterTime; assert.commandWorked(db['c'].createIndex({'value': 1})); // Start a transaction whose snapshot predates the completion of the index build, and which reserves // an oplog entry (i.e. writes) after the index build commits. try { const s1 = db.getMongo().startSession(); s1.startTransaction({readConcern: {level: "snapshot", atClusterTime: clusterTime}}); s1.getDatabase('test').c.insertOne({_id: 5, num: 1}); // Transaction should have failed. assert(0); } catch (e) { assert(e.hasOwnProperty("errorLabels"), tojson(e)); assert.contains("TransientTransactionError", e.errorLabels, tojson(e)); assert.eq(e["code"], ErrorCodes.SnapshotUnavailable, tojson(e)); } replTest.stopSet(); })();