/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.zookeeper.test;
import static org.apache.zookeeper.test.ClientBase.CONNECTION_TIMEOUT;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.PortAssignment;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZKTestCase;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.data.Stat;
import org.apache.zookeeper.server.ServerCnxnFactory;
import org.apache.zookeeper.server.ZooKeeperServer;
import org.junit.Assert;
import org.junit.Test;
public class OOMTest extends ZKTestCase implements Watcher {
@Test
public void testOOM() throws IOException, InterruptedException, KeeperException {
// This test takes too long tos run!
if (true)
return;
File tmpDir = ClientBase.createTmpDir();
// Grab some memory so that it is easier to cause an
// OOM condition;
ArrayList<byte[]> hog = new ArrayList<byte[]>();
while (true) {
try {
hog.add(new byte[1024 * 1024 * 2]);
} catch (OutOfMemoryError e) {
hog.remove(0);
break;
}
}
ClientBase.setupTestEnv();
ZooKeeperServer zks = new ZooKeeperServer(tmpDir, tmpDir, 3000);
final int PORT = PortAssignment.unique();
ServerCnxnFactory f = ServerCnxnFactory.createFactory(PORT, -1);
f.startup(zks);
Assert.assertTrue("waiting for server up",
ClientBase.waitForServerUp("127.0.0.1:" + PORT,
CONNECTION_TIMEOUT));
System.err.println("OOM Stage 0");
utestPrep(PORT);
System.out.println("Free = " + Runtime.getRuntime().freeMemory()
+ " total = " + Runtime.getRuntime().totalMemory() + " max = "
+ Runtime.getRuntime().maxMemory());
System.err.println("OOM Stage 1");
for (int i = 0; i < 1000; i++) {
System.out.println(i);
utestExists(PORT);
}
System.out.println("Free = " + Runtime.getRuntime().freeMemory()
+ " total = " + Runtime.getRuntime().totalMemory() + " max = "
+ Runtime.getRuntime().maxMemory());
System.err.println("OOM Stage 2");
for (int i = 0; i < 1000; i++) {
System.out.println(i);
utestGet(PORT);
}
System.out.println("Free = " + Runtime.getRuntime().freeMemory()
+ " total = " + Runtime.getRuntime().totalMemory() + " max = "
+ Runtime.getRuntime().maxMemory());
System.err.println("OOM Stage 3");
for (int i = 0; i < 1000; i++) {
System.out.println(i);
utestChildren(PORT);
}
System.out.println("Free = " + Runtime.getRuntime().freeMemory()
+ " total = " + Runtime.getRuntime().totalMemory() + " max = "
+ Runtime.getRuntime().maxMemory());
hog.get(0)[0] = (byte) 1;
f.shutdown();
Assert.assertTrue("waiting for server down",
ClientBase.waitForServerDown("127.0.0.1:" + PORT,
CONNECTION_TIMEOUT));
}
private void utestExists(int port)
throws IOException, InterruptedException, KeeperException
{
ZooKeeper zk =
new ZooKeeper("127.0.0.1:" + port, CONNECTION_TIMEOUT, this);
for (int i = 0; i < 10000; i++) {
zk.exists("/this/path/doesnt_exist!", true);
}
zk.close();
}
private void utestPrep(int port)
throws IOException, InterruptedException, KeeperException
{
ZooKeeper zk =
new ZooKeeper("127.0.0.1:" + port, CONNECTION_TIMEOUT, this);
for (int i = 0; i < 10000; i++) {
zk.create("/" + i, null, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
}
zk.close();
}
private void utestGet(int port)
throws IOException, InterruptedException, KeeperException
{
ZooKeeper zk =
new ZooKeeper("127.0.0.1:" + port, CONNECTION_TIMEOUT, this);
for (int i = 0; i < 10000; i++) {
Stat stat = new Stat();
zk.getData("/" + i, true, stat);
}
zk.close();
}
private void utestChildren(int port)
throws IOException, InterruptedException, KeeperException
{
ZooKeeper zk =
new ZooKeeper("127.0.0.1:" + port, CONNECTION_TIMEOUT, this);
for (int i = 0; i < 10000; i++) {
zk.getChildren("/" + i, true);
}
zk.close();
}
/*
* (non-Javadoc)
*
* @see org.apache.zookeeper.Watcher#process(org.apache.zookeeper.proto.WatcherEvent)
*/
public void process(WatchedEvent event) {
System.err.println("Got event " + event.getType() + " "
+ event.getState() + " " + event.getPath());
}
}