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
|
/*
* 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.server.persistence;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.File;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.zookeeper.server.DataTree;
import org.junit.Test;
/**
* This test checks that the server does not create empty snapshot files if the
* disk is full.
*/
public class EmptySnapshotTest {
static class MockFileSnap extends FileSnap {
MockFileSnap(File snapDir) {
super(snapDir);
}
public synchronized void serialize(DataTree dt, Map<Long, Integer> sessions, File snapShot, boolean fsync) throws IOException {
// Create empty new file.
assertTrue(snapShot.createNewFile());
throw new IOException("Created empty snapshot file from " + "MockFileSnap::serialize()");
}
}
@Test
public void testNoEmptySnapshot() throws Exception {
File tmpFile = File.createTempFile("empty-snapshot-test", ".junit", new File(System.getProperty("build.test.dir", "build")));
File tmpDataDir = new File(tmpFile + ".dir");
assertFalse(tmpDataDir.exists());
assertTrue(tmpDataDir.mkdirs());
FileTxnSnapLog snapLog = new FileTxnSnapLog(tmpDataDir, tmpDataDir);
snapLog.snapLog = new MockFileSnap(snapLog.dataDir);
assertEquals(0, ((FileSnap) snapLog.snapLog).findNRecentSnapshots(10).size());
DataTree tree = new DataTree();
tree.createNode("/empty-snapshot-test-1", "data".getBytes(), null, -1, -1, 1, 1);
try {
snapLog.save(tree, new ConcurrentHashMap<>(), false);
fail("Should have thrown an IOException");
} catch (IOException e) {
// no op
}
assertEquals(0, ((FileSnap) snapLog.snapLog).findNRecentSnapshots(10).size());
snapLog.snapLog = new FileSnap(snapLog.dataDir);
snapLog.save(tree, new ConcurrentHashMap<>(), false);
assertEquals(1, ((FileSnap) snapLog.snapLog).findNRecentSnapshots(10).size());
}
}
|
