jstests/multiVersion/minor_version_upgrade_replset.js


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//
// Tests upgrading a replica set
//

load( './jstests/multiVersion/libs/multi_rs.js' );
load( './jstests/libs/test_background_ops.js' );

// 3.2.1 is the final version to use the old style replSetUpdatePosition command.
var oldVersion = "3.2.1";

var nodes = { n1 : { binVersion : oldVersion }, 
              n2 : { binVersion : oldVersion },
              a3 : { binVersion : oldVersion } };

var rst = new ReplSetTest({ nodes : nodes });

rst.startSet();
rst.initiate();

// Wait for a primary node...
var primary = rst.getPrimary();
var otherOpConn = new Mongo( rst.getURL() );
var insertNS = "test.foo";


jsTest.log( "Starting parallel operations during upgrade..." );

function findAndInsert( rsURL, coll ){
    
    var coll = new Mongo( rsURL ).getCollection( coll + "" );
    var count = 0;
    
    jsTest.log( "Starting finds and inserts..." );
    
    while( ! isFinished() ){
        
        try{
            
            coll.insert({ _id : count, hello : "world" });
            assert.eq( null, coll.getDB().getLastError() );
            assert.neq( null, coll.findOne({ _id : count }) );
        }
        catch( e ){
            printjson( e );
        }
        
        count++;
    }
    
    jsTest.log( "Finished finds and inserts..." );
    return count;
}

var joinFindInsert = 
    startParallelOps( primary, // The connection where the test info is passed and stored
                      findAndInsert,
                      [ rst.getURL(), insertNS ] );


jsTest.log( "Upgrading replica set..." );

rst.upgradeSet({ binVersion: "latest" });

jsTest.log( "Replica set upgraded." );

// Wait for primary
var primary = rst.getPrimary();

printjson( rst.status() );


// Allow more valid writes to go through
sleep( 10 * 1000 );


joinFindInsert();

var totalInserts = primary.getCollection( insertNS ).find().sort({ _id : -1 }).next()._id + 1;
var dataFound = primary.getCollection( insertNS ).count();

jsTest.log( "Found " + dataFound + " docs out of " + tojson( totalInserts ) + " inserted." );

assert.gt( dataFound / totalInserts, 0.5 );

rst.stopSet();