jstests/multiVersion/balancer_multiVersion_detect.js


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//
// Test checks whether the balancer correctly detects a mixed set of shards
//

jsTest.log( "Starting cluster..." );

var options = {
               
    mongosOptions : { verbose : 1, useLogFiles : true },
    configOptions : {  },
    shardOptions : { binVersion : [ "latest", "last-stable" ] },
    sync : false,
    enableBalancer : true
};

var st = new ShardingTest({ shards : 3, mongos : 1, other : options });

var mongos = st.s0;
var admin = mongos.getDB("admin");
var coll = mongos.getCollection("foo.bar");

printjson(admin.runCommand({ enableSharding : coll.getDB() + "" }));
st.ensurePrimaryShard(coll.getDB().getName(), 'shard0001');
printjson(admin.runCommand({ shardCollection : coll + "", key : { _id : 1 } }));

assert.soon( function() {
    var log = cat(mongos.fullOptions.logFile);
    return /multiVersion cluster detected/.test(log);
}, "multiVersion warning not printed!", 30 * 16 * 60 * 1000, 5 * 1000);

jsTest.log("DONE!");

st.stop();