/**
* 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.hadoop.hdfs.server.namenode;
import static org.junit.Assert.fail;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY;
import java.io.File;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.apache.hadoop.fs.FileContext;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.common.Util;
/**
* Tests the CreateEditsLog utility.
*/
public class TestCreateEditsLog {
private static final File HDFS_DIR = new File(
MiniDFSCluster.getBaseDirectory()).getAbsoluteFile();
private static final File TEST_DIR = new File(
System.getProperty("test.build.data", "build/test/data"),
"TestCreateEditsLog").getAbsoluteFile();
private MiniDFSCluster cluster;
@Before
public void setUp() throws Exception {
deleteIfExists(HDFS_DIR);
deleteIfExists(TEST_DIR);
}
@After
public void tearDown() {
if (cluster != null) {
cluster.shutdown();
cluster = null;
}
deleteIfExists(HDFS_DIR);
deleteIfExists(TEST_DIR);
}
/**
* Tests that an edits log created using CreateEditsLog is valid and can be
* loaded successfully by a namenode.
*/
@Test(timeout=60000)
public void testCanLoadCreatedEditsLog() throws Exception {
// Format namenode.
HdfsConfiguration conf = new HdfsConfiguration();
File nameDir = new File(HDFS_DIR, "name");
conf.set(DFS_NAMENODE_NAME_DIR_KEY, Util.fileAsURI(nameDir).toString());
DFSTestUtil.formatNameNode(conf);
// Call CreateEditsLog and move the resulting edits to the name dir.
CreateEditsLog.main(new String[] { "-f", "1000", "0", "1", "-d",
TEST_DIR.getAbsolutePath() });
Path editsWildcard = new Path(TEST_DIR.getAbsolutePath(), "*");
FileContext localFc = FileContext.getLocalFSFileContext();
for (FileStatus edits: localFc.util().globStatus(editsWildcard)) {
Path src = edits.getPath();
Path dst = new Path(new File(nameDir, "current").getAbsolutePath(),
src.getName());
localFc.rename(src, dst);
}
// Start a namenode to try to load the edits.
cluster = new MiniDFSCluster.Builder(conf)
.format(false)
.manageNameDfsDirs(false)
.waitSafeMode(false)
.build();
cluster.waitClusterUp();
// Test successful, because no exception thrown.
}
/**
* Fully delete the given directory if it exists.
*
* @param file File to delete
*/
private static void deleteIfExists(File file) {
if (file.exists() && !FileUtil.fullyDelete(file)) {
fail("Could not delete '" + file + "'");
}
}
}