Deadlock involving ViewCatalog mutex and MMAPv1 flush lock

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    • Type: Bug
    • Resolution: Won't Fix
    • Priority: Major - P3
    • None
    • Affects Version/s: 3.4.0
    • Component/s: MMAPv1, Querying
    • Query
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      Reproducible via the following FSM test:

      'use strict';
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 name, since the workload name is assumed
        // to be unique.
        prefix: 'system_views_write'
    };

    var states = (function() {

        function init(db, collName) {
            this.threadViewName = this.prefix + '_' + this.tid;
            this.threadViewNS = db.getName() + '.' + this.threadViewName;
            this.collNS1 = db[collName].getFullName();
            this.collNS2 = db[collName].getFullName() + "_2";
        }

        function insert(db, collName) {
            const pipeline = [];
            assertAlways.writeOK(db.system.views.insert({_id: this.threadViewNS, viewOn: this.collNS1, pipeline: pipeline}));
        }

        function update(db, collName) {
            assertAlways.writeOK(db.system.views.update({_id: this.threadViewNS}, {$set: {viewOn: this.collNS2}}));
        }

        function remove(db, collName) {
            assertAlways.writeOK(db.system.views.remove({_id: this.threadViewNS}));
        }

        function read(db, collName) {
            // This is a read on an non-existent collection, which will require ViewCatalog lookup.
            assertAlways.commandWorked(db.runCommand({find: collName}));
        }

        return {init: init, insert: insert, update: update, read: read, remove: remove};

    })();

    var transitions = {
        init: {insert: 1},
        insert: {update: 0.5, read: 0.5},
        update: {remove: 0.5, read: 0.5},
        read: {remove: 0.5, read: 0.5},
        remove: {insert: 1}
    };

    function setup(db, collName, cluster) {
        const coll = db[collName];
        const viewsColl = db["system.views"];
        coll.drop();
        viewsColl.drop();
    }

    function teardown(db, collName, cluster) {
        var pattern = new RegExp('^system.views$');
        dropCollections(db, pattern);
    }

    return {
        threadCount: 10,
        iterations: 10000,
        data: data,
        states: states,
        transitions: transitions,
        setup: setup,
        teardown: teardown
    };
})();
      Show
      Reproducible via the following FSM test: 'use strict' ; load( 'jstests/concurrency/fsm_workload_helpers/drop_utils.js' ); // for dropCollections var $config = ( function () { var data = { // Use the workload name as a prefix for the view name, since the workload name is assumed // to be unique. prefix: 'system_views_write' }; var states = ( function () { function init(db, collName) { this .threadViewName = this .prefix + '_' + this .tid; this .threadViewNS = db.getName() + '.' + this .threadViewName; this .collNS1 = db[collName].getFullName(); this .collNS2 = db[collName].getFullName() + "_2" ; } function insert(db, collName) { const pipeline = []; assertAlways.writeOK(db.system.views.insert({_id: this .threadViewNS, viewOn: this .collNS1, pipeline: pipeline})); } function update(db, collName) { assertAlways.writeOK(db.system.views.update({_id: this .threadViewNS}, {$set: {viewOn: this .collNS2}})); } function remove(db, collName) { assertAlways.writeOK(db.system.views.remove({_id: this .threadViewNS})); } function read(db, collName) { // This is a read on an non-existent collection, which will require ViewCatalog lookup. assertAlways.commandWorked(db.runCommand({find: collName})); } return {init: init, insert: insert, update: update, read: read, remove: remove}; })(); var transitions = { init: {insert: 1}, insert: {update: 0.5, read: 0.5}, update: {remove: 0.5, read: 0.5}, read: {remove: 0.5, read: 0.5}, remove: {insert: 1} }; function setup(db, collName, cluster) { const coll = db[collName]; const viewsColl = db[ "system.views" ]; coll.drop(); viewsColl.drop(); } function teardown(db, collName, cluster) { var pattern = new RegExp( '^system.views$' ); dropCollections(db, pattern); } return { threadCount: 10, iterations: 10000, data: data, states: states, transitions: transitions, setup: setup, teardown: teardown }; })();
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            Assignee:
            Backlog - Query Team (Inactive)
            Reporter:
            James Wahlin
            Votes:
            0 Vote for this issue
            Watchers:
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              Created:
              Updated:
              Resolved: