1 | /** |
---|
2 | * Licensed to the Apache Software Foundation (ASF) under one |
---|
3 | * or more contributor license agreements. See the NOTICE file |
---|
4 | * distributed with this work for additional information |
---|
5 | * regarding copyright ownership. The ASF licenses this file |
---|
6 | * to you under the Apache License, Version 2.0 (the |
---|
7 | * "License"); you may not use this file except in compliance |
---|
8 | * with the License. You may obtain a copy of the License at |
---|
9 | * |
---|
10 | * http://www.apache.org/licenses/LICENSE-2.0 |
---|
11 | * |
---|
12 | * Unless required by applicable law or agreed to in writing, software |
---|
13 | * distributed under the License is distributed on an "AS IS" BASIS, |
---|
14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
---|
15 | * See the License for the specific language governing permissions and |
---|
16 | * limitations under the License. |
---|
17 | */ |
---|
18 | package org.apache.hadoop.hdfs; |
---|
19 | |
---|
20 | import java.io.IOException; |
---|
21 | |
---|
22 | import org.apache.commons.logging.impl.Log4JLogger; |
---|
23 | import org.apache.hadoop.conf.Configuration; |
---|
24 | import org.apache.hadoop.fs.FSDataInputStream; |
---|
25 | import org.apache.hadoop.fs.FSDataOutputStream; |
---|
26 | import org.apache.hadoop.fs.FileSystem; |
---|
27 | import org.apache.hadoop.fs.Path; |
---|
28 | import org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException; |
---|
29 | import org.apache.hadoop.hdfs.server.datanode.DataNode; |
---|
30 | import org.apache.hadoop.hdfs.server.namenode.FSNamesystem; |
---|
31 | import org.apache.hadoop.hdfs.server.namenode.LeaseManager; |
---|
32 | import org.apache.hadoop.security.UnixUserGroupInformation; |
---|
33 | import org.apache.hadoop.security.UserGroupInformation; |
---|
34 | import org.apache.log4j.Level; |
---|
35 | |
---|
36 | public class TestLeaseRecovery2 extends junit.framework.TestCase { |
---|
37 | { |
---|
38 | ((Log4JLogger)DataNode.LOG).getLogger().setLevel(Level.ALL); |
---|
39 | ((Log4JLogger)LeaseManager.LOG).getLogger().setLevel(Level.ALL); |
---|
40 | ((Log4JLogger)FSNamesystem.LOG).getLogger().setLevel(Level.ALL); |
---|
41 | } |
---|
42 | |
---|
43 | static final long BLOCK_SIZE = 1024; |
---|
44 | static final int FILE_SIZE = 1024*16; |
---|
45 | static final short REPLICATION_NUM = (short)3; |
---|
46 | static byte[] buffer = new byte[FILE_SIZE]; |
---|
47 | |
---|
48 | public void testBlockSynchronization() throws Exception { |
---|
49 | final long softLease = 1000; |
---|
50 | final long hardLease = 60 * 60 *1000; |
---|
51 | final short repl = 3; |
---|
52 | final Configuration conf = new Configuration(); |
---|
53 | final int bufferSize = conf.getInt("io.file.buffer.size", 4096); |
---|
54 | conf.setLong("dfs.block.size", BLOCK_SIZE); |
---|
55 | conf.setInt("dfs.heartbeat.interval", 1); |
---|
56 | // conf.setInt("io.bytes.per.checksum", 16); |
---|
57 | |
---|
58 | MiniDFSCluster cluster = null; |
---|
59 | byte[] actual = new byte[FILE_SIZE]; |
---|
60 | |
---|
61 | try { |
---|
62 | cluster = new MiniDFSCluster(conf, 5, true, null); |
---|
63 | cluster.waitActive(); |
---|
64 | |
---|
65 | //create a file |
---|
66 | DistributedFileSystem dfs = (DistributedFileSystem)cluster.getFileSystem(); |
---|
67 | // create a random file name |
---|
68 | String filestr = "/foo" + AppendTestUtil.nextInt(); |
---|
69 | System.out.println("filestr=" + filestr); |
---|
70 | Path filepath = new Path(filestr); |
---|
71 | FSDataOutputStream stm = dfs.create(filepath, true, |
---|
72 | bufferSize, repl, BLOCK_SIZE); |
---|
73 | assertTrue(dfs.dfs.exists(filestr)); |
---|
74 | |
---|
75 | // write random number of bytes into it. |
---|
76 | int size = AppendTestUtil.nextInt(FILE_SIZE); |
---|
77 | System.out.println("size=" + size); |
---|
78 | stm.write(buffer, 0, size); |
---|
79 | |
---|
80 | // sync file |
---|
81 | AppendTestUtil.LOG.info("sync"); |
---|
82 | stm.sync(); |
---|
83 | AppendTestUtil.LOG.info("leasechecker.interruptAndJoin()"); |
---|
84 | dfs.dfs.leasechecker.interruptAndJoin(); |
---|
85 | |
---|
86 | // set the soft limit to be 1 second so that the |
---|
87 | // namenode triggers lease recovery on next attempt to write-for-open. |
---|
88 | cluster.setLeasePeriod(softLease, hardLease); |
---|
89 | |
---|
90 | // try to re-open the file before closing the previous handle. This |
---|
91 | // should fail but will trigger lease recovery. |
---|
92 | { |
---|
93 | Configuration conf2 = new Configuration(conf); |
---|
94 | String username = UserGroupInformation.getCurrentUGI().getUserName()+"_1"; |
---|
95 | UnixUserGroupInformation.saveToConf(conf2, |
---|
96 | UnixUserGroupInformation.UGI_PROPERTY_NAME, |
---|
97 | new UnixUserGroupInformation(username, new String[]{"supergroup"})); |
---|
98 | FileSystem dfs2 = FileSystem.get(conf2); |
---|
99 | |
---|
100 | boolean done = false; |
---|
101 | for(int i = 0; i < 10 && !done; i++) { |
---|
102 | AppendTestUtil.LOG.info("i=" + i); |
---|
103 | try { |
---|
104 | dfs2.create(filepath, false, bufferSize, repl, BLOCK_SIZE); |
---|
105 | fail("Creation of an existing file should never succeed."); |
---|
106 | } catch (IOException ioe) { |
---|
107 | final String message = ioe.getMessage(); |
---|
108 | if (message.contains("file exists")) { |
---|
109 | AppendTestUtil.LOG.info("done", ioe); |
---|
110 | done = true; |
---|
111 | } |
---|
112 | else if (message.contains(AlreadyBeingCreatedException.class.getSimpleName())) { |
---|
113 | AppendTestUtil.LOG.info("GOOD! got " + message); |
---|
114 | } |
---|
115 | else { |
---|
116 | AppendTestUtil.LOG.warn("UNEXPECTED IOException", ioe); |
---|
117 | } |
---|
118 | } |
---|
119 | |
---|
120 | if (!done) { |
---|
121 | AppendTestUtil.LOG.info("sleep " + 5000 + "ms"); |
---|
122 | try {Thread.sleep(5000);} catch (InterruptedException e) {} |
---|
123 | } |
---|
124 | } |
---|
125 | assertTrue(done); |
---|
126 | } |
---|
127 | |
---|
128 | AppendTestUtil.LOG.info("Lease for file " + filepath + " is recovered. " |
---|
129 | + "Validating its contents now..."); |
---|
130 | |
---|
131 | // verify that file-size matches |
---|
132 | assertTrue("File should be " + size + " bytes, but is actually " + |
---|
133 | " found to be " + dfs.getFileStatus(filepath).getLen() + |
---|
134 | " bytes", |
---|
135 | dfs.getFileStatus(filepath).getLen() == size); |
---|
136 | |
---|
137 | // verify that there is enough data to read. |
---|
138 | System.out.println("File size is good. Now validating sizes from datanodes..."); |
---|
139 | FSDataInputStream stmin = dfs.open(filepath); |
---|
140 | stmin.readFully(0, actual, 0, size); |
---|
141 | stmin.close(); |
---|
142 | } |
---|
143 | finally { |
---|
144 | try { |
---|
145 | if (cluster != null) {cluster.shutdown();} |
---|
146 | } catch (Exception e) { |
---|
147 | // ignore |
---|
148 | } |
---|
149 | } |
---|
150 | } |
---|
151 | } |
---|