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
|
/**
* Verifies that a multi-document transaction aborts with WriteConflictError if an index build has
* committed since the transaction's read snapshot.
*
* @tags: [
* requires_replication,
* ]
*/
(function() {
'use strict';
const replTest = new ReplSetTest({nodes: 2});
replTest.startSet();
replTest.initiate();
const primary = replTest.getPrimary();
const db = primary.getDB('test');
// Transaction inserting an index key.
{
assert.commandWorked(db['c'].insertOne({_id: 0, num: 0}));
const s0 = db.getMongo().startSession();
s0.startTransaction();
assert.commandWorked(s0.getDatabase('test')['c'].deleteOne({_id: 0}));
s0.commitTransaction();
const clusterTime = s0.getClusterTime().clusterTime;
assert.commandWorked(db['c'].createIndex({num: 1}));
// Start a transaction whose snapshot predates the completion of the index build, and which
// reserves an oplog entry after the index build commits.
const s1 = db.getMongo().startSession();
s1.startTransaction({readConcern: {level: "snapshot", atClusterTime: clusterTime}});
const res = assert.commandFailedWithCode(s1.getDatabase('test').c.insert({_id: 1, num: 1}),
ErrorCodes.WriteConflict);
assert(res.hasOwnProperty("errorLabels"), tojson(res));
assert.contains("TransientTransactionError", res.errorLabels, tojson(res));
assert.commandFailedWithCode(s1.abortTransaction_forTesting(), ErrorCodes.NoSuchTransaction);
}
db.c.drop();
// Transaction deleting an index key.
{
assert.commandWorked(db.createCollection('c'));
const s0 = db.getMongo().startSession();
s0.startTransaction();
assert.commandWorked(s0.getDatabase('test')['c'].insertOne({_id: 0, num: 0}));
s0.commitTransaction();
const clusterTime = s0.getClusterTime().clusterTime;
assert.commandWorked(db['c'].createIndex({num: 1}));
// Start a transaction whose snapshot predates the completion of the index build, and which
// reserves an oplog entry after the index build commits.
const s1 = db.getMongo().startSession();
s1.startTransaction({readConcern: {level: "snapshot", atClusterTime: clusterTime}});
const res = assert.commandFailedWithCode(s1.getDatabase('test').c.remove({_id: 0}),
ErrorCodes.WriteConflict);
assert(res.hasOwnProperty("errorLabels"), tojson(res));
assert.contains("TransientTransactionError", res.errorLabels, tojson(res));
assert.commandFailedWithCode(s1.abortTransaction_forTesting(), ErrorCodes.NoSuchTransaction);
}
replTest.stopSet();
})();
|