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
|
'use strict';
load('jstests/concurrency/fsm_workload_helpers/auto_retry_transaction.js');
Random.setRandomSeed();
var {
withTxnAndAutoRetryOnMongos,
retryOnceOnTransientOnMongos,
retryOnceOnTransientAndRestartTxnOnMongos
} = (() => {
/**
* Runs 'func' inside of a transaction started with 'txnOptions', and automatically retries
* until it either succeeds or the server returns a non-TransientTransactionError error
* response.
*
* The caller should take care to ensure 'func' doesn't modify any captured variables in a
* speculative fashion where calling it multiple times would lead to unintended behavior. The
* transaction started by the withTxnAndAutoRetryOnMongos() function is only known to have
* committed after the withTxnAndAutoRetryOnMongos() function returns.
*
* This behaviour only applies if the client is a mongos
*
* TODO SERVER-39704: Once completed, the usages of this function should be revisited to
* determine whether it is still necessary or the retries performed by MongoS make it
* unnecessary
*/
function withTxnAndAutoRetryOnMongos(session, func, txnOptions) {
if (session.getClient().isMongos()) {
withTxnAndAutoRetry(session, func, {txnOptions});
} else {
session.startTransaction(txnOptions);
func();
assert.commandWorked(session.commitTransaction_forTesting());
}
}
/**
* Runs 'func' and retries it only once if a transient error occurred.
*
* This behaviour only applies if the client is a mongos
*
* TODO SERVER-39704: Once completed, the usages of this function should be revisited to
* determine whether it is still necessary or the retries performed by MongoS make it
* unnecessary
*/
function retryOnceOnTransientOnMongos(session, func) {
if (session.getClient().isMongos()) {
try {
func();
} catch (e) {
if ((e.hasOwnProperty('errorLabels') &&
e.errorLabels.includes('TransientTransactionError'))) {
func();
} else {
throw e;
}
}
} else {
func();
}
}
/**
* Runs 'func' and retries it only once restarting the transaction if a transient
* error occurred.
*
* This behaviour only applies if the client is a mongos
*
* TODO SERVER-39704: Once completed, the usages of this function should be revisited to
* determine whether it is still necessary or the retries performed by MongoS make it
* unnecessary
*/
function retryOnceOnTransientAndRestartTxnOnMongos(session, func, txnOptions) {
if (session.getClient().isMongos()) {
try {
func();
} catch (e) {
if ((e.hasOwnProperty('errorLabels') &&
e.errorLabels.includes('TransientTransactionError'))) {
session.abortTransaction_forTesting();
session.startTransaction(txnOptions);
func();
} else {
throw e;
}
}
} else {
func();
}
}
return {
withTxnAndAutoRetryOnMongos,
retryOnceOnTransientOnMongos,
retryOnceOnTransientAndRestartTxnOnMongos
};
})();
|
