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
|
//
// Tests whether a writeback error during bulk insert hangs GLE
//
jsTest.log("Starting sharded cluster...")
var st = new ShardingTest({shards : 1,
mongos : 3,
verbose : 2,
separateConfig : 1})
st.stopBalancer()
var mongosA = st.s0
var mongosB = st.s1
var mongosC = st.s2
jsTest.log("Adding new collection...")
var collA = mongosA.getCollection(jsTestName() + ".coll")
collA.insert({hello : "world"})
assert.eq(null, collA.getDB().getLastError())
var collB = mongosB.getCollection("" + collA)
collB.insert({hello : "world"})
assert.eq(null, collB.getDB().getLastError())
var collC = mongosB.getCollection("" + collA)
collC.insert({hello : "world"})
assert.eq(null, collC.getDB().getLastError())
jsTest.log("Enabling sharding...")
printjson(mongosA.getDB("admin").runCommand({enableSharding : collA.getDB()
+ ""}))
printjson(mongosA.getDB("admin").runCommand({shardCollection : collA + "",
key : {_id : 1}}))
// MongoD doesn't know about the config shard version *until* MongoS tells it
collA.findOne()
// Preparing insert of exactly 16MB
jsTest.log("Preparing bulk insert...")
var data1MB = "x"
while (data1MB.length < 1024 * 1024)
data1MB += data1MB;
var data7MB = ""
// Data now at 7MB
for ( var i = 0; i < 7; i++)
data7MB += data1MB;
print("7MB object size is : " + Object.bsonsize({_id : 0,
d : data7MB}))
var dataCloseTo8MB = data7MB;
// WARNING - MAGIC NUMBERS HERE
// The idea is to exceed the 16MB limit by just enough so that the message gets passed in the
// shell, but adding additional writeback information fails.
for ( var i = 0; i < 1031 * 1024 + 862; i++) {
dataCloseTo8MB += "x"
}
print("Object size is: " + Object.bsonsize([{_id : 0,
d : dataCloseTo8MB},
{_id : 1,
d : dataCloseTo8MB}]))
jsTest.log("Trigger wbl for mongosB...")
collB.insert([{_id : 0,
d : dataCloseTo8MB},
{_id : 1,
d : dataCloseTo8MB}])
// Will hang if overflow is not detected correctly
jsTest.log("Waiting for GLE...")
assert.neq(null, collB.getDB().getLastError())
print("GLE correctly returned error...")
assert.eq(3, collA.find().itcount())
assert.eq(3, collB.find().itcount())
var data8MB = "";
for ( var i = 0; i < 8; i++) {
data8MB += data1MB;
}
print("Object size is: " + Object.bsonsize([{_id : 0,
d : data8MB},
{_id : 1,
d : data8MB}]))
jsTest.log("Trigger wbl for mongosC...")
collC.insert([{_id : 0,
d : data8MB},
{_id : 1,
d : data8MB}])
// Should succeed since our insert size is 16MB (plus very small overhead)
jsTest.log("Waiting for GLE...")
assert.eq(null, collC.getDB().getLastError())
print("GLE Successful...")
assert.eq(5, collA.find().itcount())
assert.eq(5, collB.find().itcount())
st.stop()
|
