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//
// Tests that a balancer round loads newly sharded collection data
//
var options = {mongosOptions: {verbose: 1}};
var st = new ShardingTest({shards: 2, mongos: 2, other: options});
// Stop balancer initially
st.stopBalancer();
var mongos = st.s0;
var staleMongos = st.s1;
var coll = mongos.getCollection("foo.bar");
// Shard collection through first mongos
assert(mongos.adminCommand({enableSharding: coll.getDB() + ""}).ok);
st.ensurePrimaryShard(coll.getDB().getName(), 'shard0001');
assert(mongos.adminCommand({shardCollection: coll + "", key: {_id: 1}}).ok);
// Create a bunch of chunks
var numSplits = 20;
for (var i = 0; i < numSplits; i++) {
assert(mongos.adminCommand({split: coll + "", middle: {_id: i}}).ok);
}
// Stop the first mongos who setup the cluster.
st.stopMongos(0);
// Start balancer, which lets the stale mongos balance
assert.writeOK(
staleMongos.getDB("config").settings.update({_id: "balancer"}, {$set: {stopped: false}}, true));
// Make sure we eventually start moving chunks
assert.soon(function() {
return staleMongos.getCollection("config.changelog").count({what: /moveChunk/}) > 0;
}, "no balance happened", 5 * 60 * 1000);
jsTest.log("DONE!");
st.stop();
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