jstests/sharding/no_empty_reset.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

// Tests that an empty shard can't be the cause of a chunk reset

var st = new ShardingTest({shards: 2, mongos: 2});

var coll = st.s.getCollection(jsTestName() + ".coll");

for (var i = -10; i < 10; i++)
    coll.insert({_id: i});

st.shardColl(coll, {_id: 1}, {_id: 0}, {_id: 0}, null, /* waitForDelete */ true);

jsTestLog("Sharded setup complete");

st.printShardingStatus();

jsTestLog("Setting initial versions for each mongos...");

coll.find().itcount();

var collB = st.s1.getCollection("" + coll);
collB.find().itcount();

jsTestLog("Migrating via first mongos...");

var fullShard = st.getShard(coll, {_id: 1});
var emptyShard = st.getShard(coll, {_id: -1});

var admin = st.s.getDB("admin");
assert.commandWorked(st.s0.adminCommand(
    {moveChunk: "" + coll, find: {_id: -1}, to: fullShard.shardName, _waitForDelete: true}));

jsTestLog("Resetting shard version via first mongos...");

coll.find().itcount();

jsTestLog("Making sure we don't insert into the wrong shard...");

collB.insert({_id: -11});

var emptyColl = emptyShard.getCollection("" + coll);

print(emptyColl);
print(emptyShard);
print(emptyShard.shardName);
st.printShardingStatus();

assert.eq(0, emptyColl.find().itcount());

jsTestLog("DONE!");
st.stop();