(function() { "use strict";   load("jstests/replsets/libs/rollback_test.js");   const testName = "rollback_transactions_count"; const dbName = testName;   let replSet = new ReplSetTest({name: testName, nodes: 3, useBridge: true}); replSet.startSet();   const nodes = replSet.nodeList(); replSet.initiate({ _id: testName, members: [ {_id: 0, host: nodes[0]}, {_id: 1, host: nodes[1]}, {_id: 2, host: nodes[2], arbiterOnly: true} ] });   // Set up Rollback Test. let rollbackTest = new RollbackTest(testName, replSet); let primary = rollbackTest.getPrimary(); assert.commandWorked(primary.setLogLevel(3, 'storage.recovery')); let testDb = primary.getDB(dbName);   const txnName = "txnCollName";   const session1 = primary.startSession(); const sessionDb1 = session1.getDatabase(dbName); const sessionColl1 = sessionDb1[txnName]; assert.commandWorked(sessionColl1.insert({a: 1})); session1.startTransaction(); assert.commandWorked(sessionColl1.insert({b: 1})); session1.commitTransaction();   replSet.awaitLastOpCommitted(); assert.commandWorked( primary.adminCommand({configureFailPoint: 'disableSnapshotting', mode: 'alwaysOn'}));   const session2 = primary.startSession(); const sessionDb2 = session2.getDatabase(dbName); const sessionColl2 = sessionDb2[txnName]; session2.startTransaction(); assert.commandWorked(sessionColl2.insert({c: 1})); session2.commitTransaction();   rollbackTest.transitionToRollbackOperations();   session2.startTransaction(); assert.commandWorked(sessionColl2.insert({d: 1})); session2.commitTransaction();   const session3 = primary.startSession(); const sessionDb3 = session3.getDatabase(dbName); const sessionColl3 = sessionDb3[txnName]; session3.startTransaction(); assert.commandWorked(sessionColl3.insert({e: 1})); session3.commitTransaction();   rollbackTest.transitionToSyncSourceOperationsBeforeRollback(); rollbackTest.transitionToSyncSourceOperationsDuringRollback(); try { rollbackTest.transitionToSteadyStateOperations(); } finally { assert.commandWorked( primary.adminCommand({configureFailPoint: 'disableSnapshotting', mode: 'off'})); }   rollbackTest.stop(); })();