mongodb/jstests/replsets/temp_namespace_restart_as_standalone.js

/**
 * Tests that temporary collections are not dropped when a member of a replica set is started up as
 * a stand-alone mongod, i.e. without the --replSet parameter.
 *
 * @tags: [requires_persistence, requires_majority_read_concern, requires_replication]
 */
(function() {
var rst = new ReplSetTest({nodes: 2});
rst.startSet();

// Rig the election so that the first node becomes the primary and remains primary despite the
// secondary being terminated during this test.
var replSetConfig = rst.getReplSetConfig();
replSetConfig.members[1].priority = 0;
replSetConfig.members[1].votes = 0;
rst.initiate(replSetConfig);

var primaryConn = rst.getPrimary();
var secondaryConn = rst.getSecondary();

var primaryDB = primaryConn.getDB("test");
var secondaryDB = secondaryConn.getDB("test");

// Create a temporary collection and wait until the operation has replicated to the secondary.
assert.commandWorked(primaryDB.runCommand({
    applyOps: [{
        op: "c",
        ns: primaryDB.getName() + ".$cmd",
        o: {
            create: "temp_collection",
            temp: true,
            writeConcern: {w: 2, wtimeout: ReplSetTest.kDefaultTimeoutMS}
        }
    }]
}));

rst.awaitReplication();

// Verify that the temporary collection exists on the primary and has temp=true.
var primaryCollectionInfos = primaryDB.getCollectionInfos({name: "temp_collection"});
assert.eq(1, primaryCollectionInfos.length, "'temp_collection' wasn't created on the primary");
assert.eq("temp_collection",
          primaryCollectionInfos[0].name,
          "'temp_collection' wasn't created on the primary");
assert.eq(true,
          primaryCollectionInfos[0].options.temp,
          "'temp_collection' wasn't created as temporary on the primary: " +
              tojson(primaryCollectionInfos[0].options));

// Verify that the temporary collection exists on the secondary and has temp=true.
var secondaryCollectionInfos = secondaryDB.getCollectionInfos({name: "temp_collection"});
assert.eq(1, secondaryCollectionInfos.length, "'temp_collection' wasn't created on the secondary");
assert.eq("temp_collection",
          secondaryCollectionInfos[0].name,
          "'temp_collection' wasn't created on the secondary");
assert.eq(true,
          secondaryCollectionInfos[0].options.temp,
          "'temp_collection' wasn't created as temporary on the secondary: " +
              tojson(secondaryCollectionInfos[0].options));

// Shut down the secondary and restart it as a stand-alone mongod.
var secondaryNodeId = rst.getNodeId(secondaryDB.getMongo());
rst.stop(secondaryNodeId);

var storageEngine = jsTest.options().storageEngine || "wiredTiger";
if (storageEngine === "wiredTiger") {
    secondaryConn = MongoRunner.runMongod({
        dbpath: secondaryConn.dbpath,
        noCleanData: true,
        setParameter: {recoverFromOplogAsStandalone: true}
    });
} else {
    secondaryConn = MongoRunner.runMongod({dbpath: secondaryConn.dbpath, noCleanData: true});
}
assert.neq(null, secondaryConn, "secondary failed to start up as a stand-alone mongod");
secondaryDB = secondaryConn.getDB("test");

// Verify that the temporary collection still exists on the secondary and has temp=true.
secondaryCollectionInfos = secondaryDB.getCollectionInfos({name: "temp_collection"});
assert.eq(1,
          secondaryCollectionInfos.length,
          "'temp_collection' was dropped after restarting the secondary as a stand-alone");
assert.eq("temp_collection",
          secondaryCollectionInfos[0].name,
          "'temp_collection' was dropped after restarting the secondary as a stand-alone");
assert.eq(true,
          secondaryCollectionInfos[0].options.temp,
          "'temp_collection' is no longer temporary after restarting the secondary as a" +
              " stand-alone: " + tojson(secondaryCollectionInfos[0].options));

// Shut down the secondary and restart it as a member of the replica set.
MongoRunner.stopMongod(secondaryConn);

var restart = true;
rst.start(secondaryNodeId, {}, restart);

// Verify that writes are replicated to the temporary collection and can successfully be applied
// by the secondary after having restarted it.
assert.writeOK(primaryDB.temp_collection.insert(
    {}, {writeConcern: {w: 2, wtimeout: ReplSetTest.kDefaultTimeoutMS}}));

rst.stopSet();
})();