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
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* Ensures that if the primary config server is blackholed from the point of view of mongos, CRUD
* and read-only config operations continue to work.
*
* @tags: [config_shard_incompatible]
*/
(function() {
'use strict';
load('jstests/replsets/rslib.js');
// Checking index consistency involves talking to the primary config server which is blackholed from
// the mongos in this test.
TestData.skipCheckingIndexesConsistentAcrossCluster = true;
TestData.skipCheckOrphans = true;
TestData.skipCheckShardFilteringMetadata = true;
var st = new ShardingTest({shards: 2, mongos: 1, useBridge: true, config: 3});
var testDB = st.s.getDB('BlackHoleDB');
var configDB = st.s.getDB('config');
assert.commandWorked(testDB.adminCommand({enableSharding: 'BlackHoleDB'}));
assert.commandWorked(
testDB.adminCommand({shardCollection: testDB.ShardedColl.getFullName(), key: {_id: 1}}));
var bulk = testDB.ShardedColl.initializeUnorderedBulkOp();
for (var i = 0; i < 1000; i++) {
bulk.insert({_id: i});
}
assert.commandWorked(bulk.execute());
const configPrimary = st.configRS.getPrimary();
const admin = configPrimary.getDB("admin");
// Set the priority and votes to 0 for secondary config servers so that in the case
// of an election, they cannot step up. If a different node were to step up, the
// config server would no longer be blackholed from mongos.
let conf = admin.runCommand({replSetGetConfig: 1}).config;
for (let i = 0; i < conf.members.length; i++) {
if (conf.members[i].host !== configPrimary.host) {
conf.members[i].votes = 0;
conf.members[i].priority = 0;
}
}
reconfig(st.configRS, conf);
jsTest.log('Partitioning the config server primary from the mongos');
configPrimary.discardMessagesFrom(st.s, 1.0);
st.s.discardMessagesFrom(configPrimary, 1.0);
assert.commandWorked(testDB.adminCommand({flushRouterConfig: 1}));
// This should fail, because the primary is not available
jsTest.log('Doing write operation on a new database and collection');
assert.writeError(
st.s.getDB('NonExistentDB')
.TestColl.insert({_id: 0, value: 'This value will never be inserted'}, {maxTimeMS: 15000}));
jsTest.log('Doing CRUD operations on the sharded collection');
assert.soon(() => {
// eventually the mongos will route the traffic to a secondary of the config replica set
try {
return testDB.ShardedColl.countDocuments({}) === 1000;
} catch (err) {
jsTest.log("Attempt to count documents failed with error: " + err);
}
return false;
});
assert.commandWorked(testDB.ShardedColl.insert({_id: 1000}));
assert.eq(1001, testDB.ShardedColl.find().count());
jsTest.log('Doing read operations on a config server collection');
// Should fail due to primary read preference
assert.throws(function() {
configDB.chunks.find().itcount();
});
assert.throws(function() {
configDB.chunks.find().count();
});
assert.throws(function() {
configDB.chunks.aggregate().itcount();
});
// With secondary read pref config server reads should work
st.s.setReadPref('secondary');
assert.lt(0, configDB.chunks.find().itcount());
assert.lt(0, configDB.chunks.find().count());
assert.lt(0, configDB.chunks.aggregate().itcount());
jsTest.log('Remove network partition before tearing down');
configPrimary.discardMessagesFrom(st.s, 0.0);
st.s.discardMessagesFrom(configPrimary, 0.0);
st.stop();
}());
|
