/**
* 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.assertTrue;
import static org.junit.Assert.fail;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.junit.Test;
public class TestEditLogLoading {
private static final int NUM_DATA_NODES = 0;
@Test
public void testDisplayRecentEditLogOpCodes() throws IOException {
// start a cluster
Configuration conf = new Configuration();
conf.set("dfs.name.dir", new File(MiniDFSCluster.getBaseDir(), "name").getPath());
conf.setInt(DFSConfigKeys.DFS_NAMENODE_EDITS_TOLERATION_LENGTH_KEY, -1);
MiniDFSCluster cluster = null;
FileSystem fileSys = null;
cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, true, false, null, null);
cluster.waitActive();
fileSys = cluster.getFileSystem();
final FSNamesystem namesystem = cluster.getNameNode().getNamesystem();
FSImage fsimage = namesystem.getFSImage();
final FSEditLog editLog = fsimage.getEditLog();
for (int i = 0; i < 20; i++) {
fileSys.mkdirs(new Path("/tmp/tmp" + i));
}
File editFile = editLog.getFsEditName();
System.out.println("edit log file: " + editFile);
editLog.close();
cluster.shutdown();
// Corrupt the edits file.
long fileLen = editFile.length();
RandomAccessFile rwf = new RandomAccessFile(editFile, "rw");
rwf.seek(fileLen - 40);
for (int i = 0; i < 20; i++) {
rwf.write((byte) 2); // FSEditLog.DELETE
}
rwf.close();
String expectedErrorMessage = "^Failed to parse edit log.*";
expectedErrorMessage += ", Recent opcode offsets=\\[(\\d+\\s*){4}\\]$";
try {
cluster = new MiniDFSCluster(0, conf, NUM_DATA_NODES, false, false, null, null);
cluster.waitActive();
fail("should not be able to start");
} catch (IOException e) {
assertTrue("error message contains opcodes message",
e.getMessage().matches(expectedErrorMessage));
}
}
}