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
|
/**
* Tests that the auto_retry_on_network_error.js override automatically retries commands on network
* errors for commands run under a session.
* @tags: [requires_replication]
*/
(function() {
"use strict";
TestData.networkErrorAndTxnOverrideConfig = {
retryOnNetworkErrors: true
};
function getThreadName(db) {
let myUri = db.adminCommand({whatsmyuri: 1}).you;
return db.getSiblingDB("admin")
.aggregate([{$currentOp: {localOps: true}}, {$match: {client: myUri}}])
.toArray()[0]
.desc;
}
function failNextCommand(db, command) {
let threadName = getThreadName(db);
assert.commandWorked(db.adminCommand({
configureFailPoint: "failCommand",
mode: {times: 1},
data: {
closeConnection: true,
failCommands: [command],
threadName: threadName,
}
}));
}
const rst = new ReplSetTest({nodes: 1});
rst.startSet();
// awaitLastStableRecoveryTimestamp runs an 'appendOplogNote' command which is not retryable.
rst.initiateWithAnyNodeAsPrimary(
null, "replSetInitiate", {doNotWaitForStableRecoveryTimestamp: true});
// We require the 'setParameter' command to initialize a replica set, and the command will fail
// due to the override below. As a result, we must initiate our replica set before we load these
// files.
load('jstests/libs/override_methods/network_error_and_txn_override.js');
load("jstests/replsets/rslib.js");
const dbName = "test";
const collName = "auto_retry";
// The override requires the connection to be run under a session. Use the replica set URL to
// allow automatic re-targeting of the primary on NotWritablePrimary errors.
const db = new Mongo(rst.getURL()).startSession({retryWrites: true}).getDatabase(dbName);
// Commands with no disconnections should work as normal.
assert.commandWorked(db.runCommand({ping: 1}));
// Read commands are automatically retried on network errors.
failNextCommand(db, "find");
assert.commandWorked(db.runCommand({find: collName}));
failNextCommand(db, "find");
// Retryable write commands that can be retried succeed.
failNextCommand(db, "insert");
assert.commandWorked(db[collName].insert({x: 1}));
failNextCommand(db, "insert");
assert.commandWorked(db.runCommand({
insert: collName,
documents: [{x: 2}, {x: 3}],
txnNumber: NumberLong(10),
lsid: {id: UUID()}
}));
// Retryable write commands that cannot be retried (i.e. no transaction number, no session id,
// or are unordered) throw.
failNextCommand(db, "insert");
assert.throws(function() {
db.runCommand({insert: collName, documents: [{x: 1}, {x: 2}], ordered: false});
});
// The previous command shouldn't have been retried, so run a command to successfully re-target
// the primary, so the connection to it can be closed.
assert.commandWorked(db.runCommand({ping: 1}));
failNextCommand(db, "insert");
assert.throws(function() {
db.runCommand({insert: collName, documents: [{x: 1}, {x: 2}], ordered: false});
});
// getMore commands can't be retried because we won't know whether the cursor was advanced or
// not.
let cursorId = assert.commandWorked(db.runCommand({find: collName, batchSize: 0})).cursor.id;
failNextCommand(db, "getMore");
assert.throws(function() {
db.runCommand({getMore: cursorId, collection: collName});
});
cursorId = assert.commandWorked(db.runCommand({find: collName, batchSize: 0})).cursor.id;
failNextCommand(db, "getMore");
assert.throws(function() {
db.runCommand({getMore: cursorId, collection: collName});
});
rst.stopSet();
})();
|