/**
* 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;
import java.io.IOException;
import java.util.Arrays;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.datanode.TestInterDatanodeProtocol;
import org.apache.hadoop.hdfs.server.datanode.FSDatasetTestUtil;
import org.apache.hadoop.hdfs.server.protocol.BlockMetaDataInfo;
import org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol;
public class TestLeaseRecovery extends junit.framework.TestCase {
static final int BLOCK_SIZE = 1024;
static final short REPLICATION_NUM = (short)3;
static void checkMetaInfo(Block b, InterDatanodeProtocol idp
) throws IOException {
TestInterDatanodeProtocol.checkMetaInfo(b, idp, null);
}
static int min(Integer... x) {
int m = x[0];
for(int i = 1; i < x.length; i++) {
if (x[i] < m) {
m = x[i];
}
}
return m;
}
public void testBlockSynchronization() throws Exception {
runTestBlockSynchronization(false);
}
public void testBlockSynchronizationWithZeroBlock() throws Exception {
runTestBlockSynchronization(true);
}
/**
* The following test first creates a file with a few blocks.
* It randomly truncates the replica of the last block stored in each datanode.
* Finally, it triggers block synchronization to synchronize all stored block.
* @param forceOneBlockToZero if true, will truncate one block to 0 length
*/
public void runTestBlockSynchronization(boolean forceOneBlockToZero)
throws Exception {
final int ORG_FILE_SIZE = 3000;
Configuration conf = new Configuration();
conf.setLong("dfs.block.size", BLOCK_SIZE);
conf.setBoolean("dfs.support.append", true);
MiniDFSCluster cluster = null;
try {
cluster = new MiniDFSCluster(conf, 5, true, null);
cluster.waitActive();
//create a file
DistributedFileSystem dfs = (DistributedFileSystem)cluster.getFileSystem();
String filestr = "/foo";
Path filepath = new Path(filestr);
DFSTestUtil.createFile(dfs, filepath, ORG_FILE_SIZE, REPLICATION_NUM, 0L);
assertTrue(dfs.dfs.exists(filestr));
DFSTestUtil.waitReplication(dfs, filepath, REPLICATION_NUM);
//get block info for the last block
LocatedBlock locatedblock = TestInterDatanodeProtocol.getLastLocatedBlock(
dfs.dfs.namenode, filestr);
DatanodeInfo[] datanodeinfos = locatedblock.getLocations();
assertEquals(REPLICATION_NUM, datanodeinfos.length);
//connect to data nodes
InterDatanodeProtocol[] idps = new InterDatanodeProtocol[REPLICATION_NUM];
DataNode[] datanodes = new DataNode[REPLICATION_NUM];
for(int i = 0; i < REPLICATION_NUM; i++) {
idps[i] = DataNode.createInterDataNodeProtocolProxy(datanodeinfos[i], conf);
datanodes[i] = cluster.getDataNode(datanodeinfos[i].getIpcPort());
assertTrue(datanodes[i] != null);
}
//verify BlockMetaDataInfo
Block lastblock = locatedblock.getBlock();
DataNode.LOG.info("newblocks=" + lastblock);
for(int i = 0; i < REPLICATION_NUM; i++) {
checkMetaInfo(lastblock, idps[i]);
}
//setup random block sizes
int lastblocksize = ORG_FILE_SIZE % BLOCK_SIZE;
Integer[] newblocksizes = new Integer[REPLICATION_NUM];
for(int i = 0; i < REPLICATION_NUM; i++) {
newblocksizes[i] = AppendTestUtil.nextInt(lastblocksize);
}
if (forceOneBlockToZero) {
newblocksizes[0] = 0;
}
DataNode.LOG.info("newblocksizes = " + Arrays.asList(newblocksizes));
//update blocks with random block sizes
Block[] newblocks = new Block[REPLICATION_NUM];
for(int i = 0; i < REPLICATION_NUM; i++) {
DataNode dn = datanodes[i];
FSDatasetTestUtil.truncateBlock(dn, lastblock, newblocksizes[i]);
newblocks[i] = new Block(lastblock.getBlockId(), newblocksizes[i],
lastblock.getGenerationStamp());
checkMetaInfo(newblocks[i], idps[i]);
}
DataNode.LOG.info("dfs.dfs.clientName=" + dfs.dfs.clientName);
cluster.getNameNode().append(filestr, dfs.dfs.clientName);
//block synchronization
final int primarydatanodeindex = AppendTestUtil.nextInt(datanodes.length);
DataNode.LOG.info("primarydatanodeindex =" + primarydatanodeindex);
DataNode primary = datanodes[primarydatanodeindex];
DataNode.LOG.info("primary.dnRegistration=" + primary.dnRegistration);
primary.recoverBlocks(new Block[]{lastblock}, new DatanodeInfo[][]{datanodeinfos}).join();
BlockMetaDataInfo[] updatedmetainfo = new BlockMetaDataInfo[REPLICATION_NUM];
int minsize = min(newblocksizes);
long currentGS = cluster.getNameNode().namesystem.getGenerationStamp();
lastblock.setGenerationStamp(currentGS);
for(int i = 0; i < REPLICATION_NUM; i++) {
updatedmetainfo[i] = idps[i].getBlockMetaDataInfo(lastblock);
assertEquals(lastblock.getBlockId(), updatedmetainfo[i].getBlockId());
assertEquals(minsize, updatedmetainfo[i].getNumBytes());
assertEquals(currentGS, updatedmetainfo[i].getGenerationStamp());
}
}
finally {
if (cluster != null) {cluster.shutdown();}
}
}
}