Reproducible via WIP fsm test for views cycle detection ( SERVER-25808 ): 'use strict' ; /** * view_catalog_cycle_with_drop.js * * */ load( 'jstests/concurrency/fsm_workload_helpers/drop_utils.js' ); // for dropCollections var $config = (function() { var data = { // Use the workload name as a prefix for the view names, // since the workload name is assumed to be unique. prefix: 'view_catalog_cycle_with_drop' , viewList: [ "viewA" , "viewB" , "viewC" ], }; function assertIfNotOKAndNotCode(result, code) { assertAlways(result.ok === 1 || (result.ok === 0 && result.code !== code, tojson(result))); } var states = (function() { function init(db, colName) { } function remapViewToView(db, colName) { let fromName = this .viewList[Random.randInt(3)]; let toName = this .viewList[Random.randInt(3)]; let res = db.runCommand({collMod: fromName, viewOn: toName, pipeline: []}); assertIfNotOKAndNotCode(res, ErrorCodes.GraphContainsCycle); } function readFromView(db, colName) { let viewName = this .viewList[Random.randInt(3)]; assert .commandWorked(db.runCommand({find: viewName}), viewName + ": " + tojson(db.runCommand({listCollections: 1}))); } return { init: init, remapViewToView: remapViewToView, readFromView: readFromView }; })(); var transitions = { init: {remapViewToView: .75, readFromView: .25}, remapViewToView: {remapViewToView: .75, readFromView: .25}, readFromView: {remapViewToView: .50, readFromView: .50}, }; function setup(db, collName, cluster) { // Setup base collection & populate. let col = db[collName]; assertAlways.writeOK(col.insert({x: 1})); for ( var i in this .viewList) { db.createView( this .viewList[i], collName, []); } jsTest.log(tojson(db.runCommand({listCollections: 1}))); }; function teardown(db, collName, cluster) { var pattern = new RegExp( '^' + this .prefix + '_\\d+$' ); dropCollections(db, pattern); }; return { threadCount: 100, iterations: 100, data: data, states: states, transitions: transitions, setup: setup, teardown: teardown, }; })();