1version: 1
2style: integration
3description: threads blocked by maxConnecting check out minPoolSize connections
4runOn:
5 -
6 # required for blockConnection in fail point
7 minServerVersion: "4.4.0"
8failPoint:
9 configureFailPoint: failCommand
10 mode: "alwaysOn"
11 data:
12 failCommands: ["isMaster","hello"]
13 closeConnection: false
14 blockConnection: true
15 blockTimeMS: 500
16poolOptions:
17 # allows both thread1 and the background thread to start opening connections concurrently
18 minPoolSize: 2
19 # gives opportunity for the checkout in thread2 to open a new connection, which it must not do nonetheless
20 maxPoolSize: 3
21 waitQueueTimeoutMS: 5000
22operations:
23 - name: ready
24 # thread1 exists to hold on one of the two permits to open a connection (the other one is initially held by the background thread),
25 # so that thread2 would be blocked acquiring a permit, which opens an opportunity for it to grab the connection newly opened
26 # by the background thread instead of opening a third connection.
27 - name: start
28 target: thread1
29 - name: start
30 target: thread2
31 # Ideally, thread1 should be holding for its permit to open a connection till the end of the test, but we cannot express that.
32 # This delay emulates the above requirement:
33 # - it is long enough to make sure that the background thread opens a connection before thread1 releases its permit;
34 # - it is short enough to allow thread2 to become blocked acquiring a permit to open a connection, and then grab the connection
35 # opened by the background thread, before the background thread releases its permit.
36 - name: wait
37 ms: 200
38 - name: checkOut
39 thread: thread1
40 - name: waitForEvent
41 event: ConnectionCreated
42 count: 2
43 - name: checkOut
44 thread: thread2
45 - name: waitForEvent
46 event: ConnectionCheckedOut
47 count: 2
48events:
49 # exactly 2 connections must be created and checked out
50 - type: ConnectionCreated
51 address: 42
52 - type: ConnectionCreated
53 address: 42
54 - type: ConnectionCheckedOut
55 address: 42
56 - type: ConnectionCheckedOut
57 address: 42
58ignore:
59 - ConnectionPoolReady
60 - ConnectionClosed
61 - ConnectionReady
62 - ConnectionPoolCreated
63 - ConnectionCheckOutStarted
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