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
|
// test rollback in replica sets
// try running as :
//
// mongo --nodb rollback.js | tee out | grep -v ^m31
//
var debugging = 0;
function pause(s) {
print(s);
while (debugging) {
sleep(3000);
print(s);
}
}
function deb(obj) {
if( debugging ) {
print("\n\n\n" + obj + "\n\n");
}
}
w = 0;
function wait(f) {
w++;
var n = 0;
while (!f()) {
if( n % 4 == 0 )
print("rollback.js waiting " + w);
if (++n == 4) {
print("" + f);
}
assert(n < 200, 'tried 200 times, giving up');
sleep(1000);
}
}
doTest = function (signal) {
var replTest = new ReplSetTest({ name: 'unicomplex', nodes: 3 });
var nodes = replTest.nodeList();
//print(tojson(nodes));
var conns = replTest.startSet();
var r = replTest.initiate({ "_id": "unicomplex",
"members": [
{ "_id": 0, "host": nodes[0] },
{ "_id": 1, "host": nodes[1] },
{ "_id": 2, "host": nodes[2], arbiterOnly: true}]
});
// Make sure we have a master
var master = replTest.getMaster();
a_conn = conns[0];
A = a_conn.getDB("admin");
b_conn = conns[1];
a_conn.setSlaveOk();
b_conn.setSlaveOk();
B = b_conn.getDB("admin");
assert(master == conns[0], "conns[0] assumed to be master");
assert(a_conn == master);
//deb(master);
// Make sure we have an arbiter
assert.soon(function () {
res = conns[2].getDB("admin").runCommand({ replSetGetStatus: 1 });
return res.myState == 7;
}, "Arbiter failed to initialize.");
// Wait for initial replication
var a = a_conn.getDB("foo");
var b = b_conn.getDB("foo");
/* force the oplog to roll */
if (new Date() % 2 == 0) {
print("ROLLING OPLOG AS PART OF TEST (we only do this sometimes)");
var pass = 1;
var first = a.getSisterDB("local").oplog.rs.find().sort({ $natural: 1 }).limit(1)[0];
a.roll.insert({ x: 1 });
while (1) {
for (var i = 0; i < 10000; i++)
a.roll.update({}, { $inc: { x: 1} });
var op = a.getSisterDB("local").oplog.rs.find().sort({ $natural: 1 }).limit(1)[0];
if (tojson(op.h) != tojson(first.h)) {
printjson(op);
printjson(first);
break;
}
pass++;
a.getLastError(2); // unlikely secondary isn't keeping up, but let's avoid possible intermittent issues with that.
}
print("PASSES FOR OPLOG ROLL: " + pass);
}
else {
print("NO ROLL");
}
a.bar.insert({ q: 1, a: "foo" });
a.bar.insert({ q: 2, a: "foo", x: 1 });
a.bar.insert({ q: 3, bb: 9, a: "foo" });
assert(a.bar.count() == 3, "t.count");
// wait for secondary to get this data
wait(function () { return b.bar.count() == 3; });
A.runCommand({ replSetTest: 1, blind: true });
reconnect(a,b);
wait(function () { return B.isMaster().ismaster; });
b.bar.insert({ q: 4 });
b.bar.insert({ q: 5 });
b.bar.insert({ q: 6 });
assert(b.bar.count() == 6, "u.count");
// a should not have the new data as it was in blind state.
B.runCommand({ replSetTest: 1, blind: true });
print("*************** wait for server to reconnect ****************");
reconnect(a,b);
A.runCommand({ replSetTest: 1, blind: false });
reconnect(a,b);
print("*************** B ****************");
wait(function () { try { return !B.isMaster().ismaster; } catch(e) { return false; } });
print("*************** A ****************");
reconnect(a,b);
wait(function () {
try {
return A.isMaster().ismaster;
} catch(e) {
return false;
}
});
assert(a.bar.count() == 3, "t is 3");
a.bar.insert({ q: 7 });
a.bar.insert({ q: 8 });
{
assert(a.bar.count() == 5);
var x = a.bar.find().toArray();
assert(x[0].q == 1, '1');
assert(x[1].q == 2, '2');
assert(x[2].q == 3, '3');
assert(x[3].q == 7, '7');
assert(x[4].q == 8, '8');
}
// A is 1 2 3 7 8
// B is 1 2 3 4 5 6
// bring B back online
B.runCommand({ replSetTest: 1, blind: false });
reconnect(a,b);
wait(function () { return B.isMaster().ismaster || B.isMaster().secondary; });
// everyone is up here...
assert(A.isMaster().ismaster || A.isMaster().secondary, "A up");
assert(B.isMaster().ismaster || B.isMaster().secondary, "B up");
replTest.awaitReplication();
friendlyEqual(a.bar.find().sort({ _id: 1 }).toArray(), b.bar.find().sort({ _id: 1 }).toArray(), "server data sets do not match");
pause("rollback.js SUCCESS");
replTest.stopSet(signal);
};
var reconnect = function(a,b) {
wait(function() {
try {
a.bar.stats();
b.bar.stats();
return true;
} catch(e) {
print(e);
return false;
}
});
};
print("rollback.js");
doTest( 15 );
|
