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
|
(function() {
'use strict';
if (jsTest.options().storageEngine === "mmapv1") {
jsTestLog("Retryable writes are not supported, skipping test");
return;
}
function Repl(lifetime) {
this.rst = new ReplSetTest({
nodes: 1,
nodeOptions: {setParameter: {TransactionRecordMinimumLifetimeMinutes: lifetime}},
});
this.rst.startSet();
this.rst.initiate();
}
Repl.prototype.stop = function() {
this.rst.stopSet();
};
Repl.prototype.getConn = function() {
return this.rst.getPrimary();
};
Repl.prototype.getTransactionConn = function() {
return this.rst.getPrimary();
};
function Sharding(lifetime) {
this.st = new ShardingTest({
shards: 1,
mongos: 1,
config: 1,
other: {
rs: true,
rsOptions: {setParameter: {TransactionRecordMinimumLifetimeMinutes: lifetime}},
rs0: {nodes: 1},
},
});
this.st.s0.getDB("admin").runCommand({enableSharding: "test"});
this.st.s0.getDB("admin").runCommand({shardCollection: "test.test", key: {_id: 1}});
// Ensure that the sessions collection exists.
this.st.c0.getDB("admin").runCommand({refreshLogicalSessionCacheNow: 1});
}
Sharding.prototype.stop = function() {
this.st.stop();
};
Sharding.prototype.getConn = function() {
return this.st.s0;
};
Sharding.prototype.getTransactionConn = function() {
return this.st.rs0.getPrimary();
};
const nSessions = 1500;
function Fixture(impl) {
this.impl = impl;
this.conn = impl.getConn();
this.transactionConn = impl.getTransactionConn();
this.sessions = [];
for (var i = 0; i < nSessions; i++) {
// make a session and get it to the collection
var session = this.conn.startSession({retryWrites: 1});
session.getDatabase("test").test.count({});
this.sessions.push(session);
}
this.refresh();
this.assertOutstandingTransactions(0);
this.assertOutstandingSessions(nSessions);
for (var i = 0; i < nSessions; i++) {
// make a session and get it to the collection
var session = this.sessions[i];
session.getDatabase("test").test.save({a: 1});
}
// Ensure a write flushes a transaction
this.assertOutstandingTransactions(nSessions);
this.assertOutstandingSessions(nSessions);
// Ensure a refresh/reap doesn't remove the transaction
this.refresh();
this.reap();
this.assertOutstandingTransactions(nSessions);
this.assertOutstandingSessions(nSessions);
}
Fixture.prototype.assertOutstandingTransactions = function(count) {
assert.eq(count, this.transactionConn.getDB("config").transactions.count());
};
Fixture.prototype.assertOutstandingSessions = function(count) {
assert.eq(count, this.getDB("config").system.sessions.count());
};
Fixture.prototype.refresh = function() {
assert.commandWorked(this.getDB("admin").runCommand({refreshLogicalSessionCacheNow: 1}));
};
Fixture.prototype.reap = function() {
assert.commandWorked(
this.transactionConn.getDB("admin").runCommand({reapLogicalSessionCacheNow: 1}));
};
Fixture.prototype.getDB = function(db) {
return this.conn.getDB(db);
};
Fixture.prototype.stop = function() {
this.sessions.forEach(function(session) {
session.endSession();
});
return this.impl.stop();
};
[Repl, Sharding].forEach(function(Impl) {
{
var fixture = new Fixture(new Impl(-1));
// Remove a session
fixture.getDB("config").system.sessions.remove({});
fixture.assertOutstandingTransactions(nSessions);
fixture.assertOutstandingSessions(0);
// See the transaction get reaped as a result
fixture.reap();
fixture.assertOutstandingTransactions(0);
fixture.assertOutstandingSessions(0);
fixture.stop();
}
{
var fixture = new Fixture(new Impl(30));
// Remove a session
fixture.getDB("config").system.sessions.remove({});
fixture.assertOutstandingTransactions(nSessions);
fixture.assertOutstandingSessions(0);
// See the transaction was not reaped as a result
fixture.reap();
fixture.assertOutstandingTransactions(nSessions);
fixture.assertOutstandingSessions(0);
fixture.stop();
}
});
})();
|
