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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
|
/*
* Tests when internal transactions overwrite existing transactions.
*
* @tags: [requires_fcv_60, uses_transactions]
*/
(function() {
'use strict';
load("jstests/libs/fail_point_util.js");
load("jstests/libs/uuid_util.js");
const st = new ShardingTest({shards: 1, rs: {nodes: 2}});
const kDbName = "testDb";
const kCollName = "testColl";
const testDB = st.rs0.getPrimary().getDB(kDbName);
assert.commandWorked(testDB[kCollName].insert({x: 1})); // Set up the collection.
(() => {
jsTest.log("Verify in progress child transactions are aborted by higher txnNumbers");
let clientTxnNumber = 5;
const clientSession = {id: UUID()};
const retryableChildSession = {
id: clientSession.id,
txnUUID: UUID(),
txnNumber: NumberLong(clientTxnNumber)
};
const nonRetryableChildSession = {id: clientSession.id, txnUUID: UUID()};
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: clientSession,
txnNumber: NumberLong(clientTxnNumber),
startTransaction: true,
autocommit: false
}));
// A new child transaction should abort an existing client transaction.
clientTxnNumber++;
retryableChildSession.txnNumber = NumberLong(clientTxnNumber);
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: retryableChildSession,
txnNumber: NumberLong(0),
startTransaction: true,
autocommit: false
}));
// The client transaction should have been aborted.
assert.commandFailedWithCode(testDB.adminCommand({
commitTransaction: 1,
lsid: clientSession,
txnNumber: NumberLong(clientTxnNumber - 1),
autocommit: false
}),
ErrorCodes.TransactionTooOld);
// A non-retryable child transaction shouldn't affect retryable operations.
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: nonRetryableChildSession,
txnNumber: NumberLong(0),
startTransaction: true,
autocommit: false
}));
// The retryable child transaction should still be open.
assert.commandWorked(testDB.runCommand({
find: kCollName,
lsid: retryableChildSession,
txnNumber: NumberLong(0),
autocommit: false
}));
// A new child transaction should abort a lower child transaction.
clientTxnNumber++;
let retryableChildSessionCopy = Object.merge({}, retryableChildSession);
retryableChildSession.txnNumber = NumberLong(clientTxnNumber);
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: retryableChildSession,
txnNumber: NumberLong(0),
startTransaction: true,
autocommit: false
}));
// The child transaction should have been aborted.
assert.commandFailedWithCode(testDB.adminCommand({
commitTransaction: 1,
lsid: retryableChildSessionCopy,
txnNumber: NumberLong(0),
autocommit: false
}),
ErrorCodes.TransactionTooOld);
// A new client transaction should abort a lower child transaction.
clientTxnNumber++;
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: clientSession,
txnNumber: NumberLong(clientTxnNumber),
startTransaction: true,
autocommit: false
}));
// The client transaction should have been aborted.
assert.commandFailedWithCode(testDB.adminCommand({
commitTransaction: 1,
lsid: retryableChildSessionCopy,
txnNumber: NumberLong(0),
autocommit: false
}),
ErrorCodes.TransactionTooOld);
// A new retryable write should abort a lower child transaction.
clientTxnNumber++;
retryableChildSession.txnNumber = NumberLong(clientTxnNumber);
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: retryableChildSession,
txnNumber: NumberLong(0),
startTransaction: true,
autocommit: false
}));
clientTxnNumber++;
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: clientSession,
txnNumber: NumberLong(clientTxnNumber)
}));
// The child transaction should have been aborted.
assert.commandFailedWithCode(testDB.adminCommand({
commitTransaction: 1,
lsid: retryableChildSession,
txnNumber: NumberLong(0),
autocommit: false
}),
ErrorCodes.TransactionTooOld);
// The non-retryable child transaction should still be open.
assert.commandWorked(testDB.adminCommand({
commitTransaction: 1,
lsid: nonRetryableChildSession,
txnNumber: NumberLong(0),
autocommit: false
}));
})();
(() => {
jsTest.log("Verify prepared child transactions are not aborted by higher txnNumbers");
let clientTxnNumber = 5;
const clientSession = {id: UUID()};
const retryableChildSession = {
id: clientSession.id,
txnUUID: UUID(),
txnNumber: NumberLong(clientTxnNumber)
};
const nonRetryableChildSession = {id: clientSession.id, txnUUID: UUID()};
// Prepare a retryable and non-retryable child transaction.
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: nonRetryableChildSession,
txnNumber: NumberLong(0),
startTransaction: true,
autocommit: false
}));
assert.commandWorked(testDB.adminCommand({
prepareTransaction: 1,
lsid: nonRetryableChildSession,
txnNumber: NumberLong(0),
autocommit: false
}));
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: retryableChildSession,
txnNumber: NumberLong(0),
startTransaction: true,
autocommit: false
}));
assert.commandWorked(testDB.adminCommand({
prepareTransaction: 1,
lsid: retryableChildSession,
txnNumber: NumberLong(0),
autocommit: false
}));
// Verify a higher txnNumber cannot be accepted until the retryable transaction exits prepare.
// Test all three sources of a higher txnNumber: client retryable write, client transaction, and
// a retryable child session transaction.
clientTxnNumber++;
assert.commandFailedWithCode(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: clientSession,
txnNumber: NumberLong(clientTxnNumber),
maxTimeMS: 1000
}),
ErrorCodes.MaxTimeMSExpired);
clientTxnNumber++;
assert.commandFailedWithCode(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: clientSession,
txnNumber: NumberLong(clientTxnNumber),
startTransaction: true,
autocommit: false,
maxTimeMS: 1000
}),
ErrorCodes.MaxTimeMSExpired);
clientTxnNumber++;
assert.commandFailedWithCode(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: {id: clientSession.id, txnUUID: UUID(), txnNumber: NumberLong(clientTxnNumber)},
txnNumber: NumberLong(clientTxnNumber),
startTransaction: true,
autocommit: false,
maxTimeMS: 1000
}),
ErrorCodes.MaxTimeMSExpired);
// Verify a transaction blocked on a prepared child transaction can become unstuck and succeed
// once the child transaction exits prepare.
const fp = configureFailPoint(
st.rs0.getPrimary(),
"waitAfterNewStatementBlocksBehindOpenInternalTransactionForRetryableWrite");
const newTxnThread = new Thread((host, lsidUUID, txnNumber) => {
const lsid = {id: UUID(lsidUUID)};
const conn = new Mongo(host);
assert.commandWorked(conn.getDB("foo").runCommand({
insert: "test",
documents: [{x: 1}],
lsid: lsid,
txnNumber: NumberLong(txnNumber),
startTransaction: true,
autocommit: false,
}));
assert.commandWorked(conn.adminCommand({
commitTransaction: 1,
lsid: lsid,
txnNumber: NumberLong(txnNumber),
autocommit: false
}));
}, st.s.host, extractUUIDFromObject(clientSession.id), clientTxnNumber);
newTxnThread.start();
// Wait for the side transaction to hit a PreparedTransactionInProgress error, then resolve the
// prepared transaction and verify the side transaction can successfully complete.
fp.wait();
fp.off();
assert.commandWorked(testDB.adminCommand({
abortTransaction: 1,
lsid: retryableChildSession,
txnNumber: NumberLong(0),
autocommit: false
}));
newTxnThread.join();
// A higher txnNumber is accepted despite the prepared non-retryable child transaction.
clientTxnNumber++;
assert.commandWorked(testDB.runCommand({
insert: kCollName,
documents: [{x: 1}],
lsid: clientSession,
txnNumber: NumberLong(clientTxnNumber)
}));
assert.commandWorked(testDB.adminCommand({
abortTransaction: 1,
lsid: nonRetryableChildSession,
txnNumber: NumberLong(0),
autocommit: false
}));
})();
st.stop();
})();
|
