jstests/sharding/mongos_no_detect_sharding.js


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// Tests whether new sharding is detected on insert by mongos
(function() {

var st = new ShardingTest({name: "mongos_no_detect_sharding", shards: 1, mongos: 2});

var mongos = st.s;
var config = mongos.getDB("config");

print("Creating unsharded connection...");

var mongos2 = st._mongos[1];

var coll = mongos2.getCollection("test.foo");
assert.commandWorked(coll.insert({i: 0}));

print("Sharding collection...");

var admin = mongos.getDB("admin");

assert.eq(coll.getShardVersion().ok, 0);

admin.runCommand({enableSharding: "test"});
admin.runCommand({shardCollection: "test.foo", key: {_id: 1}});

print("Seeing if data gets inserted unsharded...");
print("No splits occur here!");

// Insert a bunch of data which should trigger a split
var bulk = coll.initializeUnorderedBulkOp();
for (var i = 0; i < 100; i++) {
    bulk.insert({i: i + 1});
}
assert.commandWorked(bulk.execute());

st.printShardingStatus(true);

assert.eq(coll.getShardVersion().ok, 1);
assert.eq(101, coll.find().itcount());

st.stop();
})();