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
|
/*
* Copyright (C) 2017 Brett Wooldridge
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.zaxxer.hikari.pool;
import static com.zaxxer.hikari.pool.TestElf.getConcurrentBag;
import static com.zaxxer.hikari.pool.TestElf.getPool;
import static com.zaxxer.hikari.pool.TestElf.newHikariConfig;
import static com.zaxxer.hikari.pool.TestElf.setSlf4jLogLevel;
import static com.zaxxer.hikari.util.ClockSource.currentTime;
import static com.zaxxer.hikari.util.ClockSource.elapsedMillis;
import static com.zaxxer.hikari.util.UtilityElf.quietlySleep;
import static java.lang.Math.round;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertEquals;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Arrays;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.logging.log4j.Level;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
import com.zaxxer.hikari.mocks.StubConnection;
import com.zaxxer.hikari.mocks.StubStatement;
/**
* @author Brett Wooldridge
*/
public class SaturatedPoolTest830
{
private static final Logger LOGGER = LoggerFactory.getLogger(SaturatedPoolTest830.class);
private static final int MAX_POOL_SIZE = 10;
@Test
public void saturatedPoolTest() throws Exception {
HikariConfig config = newHikariConfig();
config.setMinimumIdle(5);
config.setMaximumPoolSize(MAX_POOL_SIZE);
config.setInitializationFailTimeout(Long.MAX_VALUE);
config.setConnectionTimeout(1000);
config.setDataSourceClassName("com.zaxxer.hikari.mocks.StubDataSource");
StubConnection.slowCreate = true;
StubStatement.setSimulatedQueryTime(1000);
setSlf4jLogLevel(HikariPool.class, Level.DEBUG);
System.setProperty("com.zaxxer.hikari.housekeeping.periodMs", "5000");
final long start = currentTime();
try (final HikariDataSource ds = new HikariDataSource(config)) {
LinkedBlockingQueue<Runnable> queue = new LinkedBlockingQueue<>();
ThreadPoolExecutor threadPool = new ThreadPoolExecutor( 50 /*core*/, 50 /*max*/, 2 /*keepalive*/, SECONDS, queue, new ThreadPoolExecutor.CallerRunsPolicy());
threadPool.allowCoreThreadTimeOut(true);
AtomicInteger windowIndex = new AtomicInteger();
boolean[] failureWindow = new boolean[100];
Arrays.fill(failureWindow, true);
// Initial saturation
for (int i = 0; i < 50; i++) {
threadPool.execute(() -> {
try (Connection conn = ds.getConnection();
Statement stmt = conn.createStatement()) {
stmt.execute("SELECT bogus FROM imaginary");
}
catch (SQLException e) {
LOGGER.info(e.getMessage());
}
});
}
long sleep = 80;
outer: while (true) {
quietlySleep(sleep);
if (elapsedMillis(start) > SECONDS.toMillis(12) && sleep < 100) {
sleep = 100;
LOGGER.warn("Switching to 100ms sleep");
}
else if (elapsedMillis(start) > SECONDS.toMillis(6) && sleep < 90) {
sleep = 90;
LOGGER.warn("Switching to 90ms sleep");
}
threadPool.execute(() -> {
int ndx = windowIndex.incrementAndGet() % failureWindow.length;
try (Connection conn = ds.getConnection();
Statement stmt = conn.createStatement()) {
stmt.execute("SELECT bogus FROM imaginary");
failureWindow[ndx] = false;
}
catch (SQLException e) {
LOGGER.info(e.getMessage());
failureWindow[ndx] = true;
}
});
for (int i = 0; i < failureWindow.length; i++) {
if (failureWindow[i]) {
if (elapsedMillis(start) % (SECONDS.toMillis(1) - sleep) < sleep) {
LOGGER.info("Active threads {}, submissions per second {}, waiting threads {}",
threadPool.getActiveCount(),
SECONDS.toMillis(1) / sleep,
getPool(ds).getThreadsAwaitingConnection());
}
continue outer;
}
}
LOGGER.info("Timeouts have subsided.");
LOGGER.info("Active threads {}, submissions per second {}, waiting threads {}",
threadPool.getActiveCount(),
SECONDS.toMillis(1) / sleep,
getPool(ds).getThreadsAwaitingConnection());
break;
}
LOGGER.info("Waiting for completion of {} active tasks.", threadPool.getActiveCount());
while (getPool(ds).getActiveConnections() > 0) {
quietlySleep(50);
}
assertEquals("Rate not in balance at 10req/s", SECONDS.toMillis(1) / sleep, 10L);
}
finally {
StubStatement.setSimulatedQueryTime(0);
StubConnection.slowCreate = false;
System.clearProperty("com.zaxxer.hikari.housekeeping.periodMs");
setSlf4jLogLevel(HikariPool.class, Level.INFO);
}
}
}
|
