TestPendingInvalidateBlock.java
/**
* 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.blockmanagement;
import java.lang.reflect.Method;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSClient;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.MiniDFSCluster.DataNodeProperties;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
import org.apache.hadoop.test.GenericTestUtils;
import org.apache.hadoop.test.Whitebox;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mockito;
import org.slf4j.event.Level;
import java.util.function.Supplier;
/**
* Test if we can correctly delay the deletion of blocks.
*/
public class TestPendingInvalidateBlock {
{
GenericTestUtils.setLogLevel(BlockManager.LOG, Level.TRACE);
}
private static final int BLOCKSIZE = 1024;
private static final short REPLICATION = 2;
private Configuration conf;
private MiniDFSCluster cluster;
private DistributedFileSystem dfs;
@Before
public void setUp() throws Exception {
conf = new Configuration();
conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCKSIZE);
// block deletion pending period
conf.setLong(DFSConfigKeys.DFS_NAMENODE_STARTUP_DELAY_BLOCK_DELETION_SEC_KEY, 5L);
// set the block report interval to 2s
conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 2000);
conf.setLong(DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY, 1);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_REDUNDANCY_INTERVAL_SECONDS_KEY, 1);
// disable the RPC timeout for debug
conf.setLong(CommonConfigurationKeys.IPC_PING_INTERVAL_KEY, 0);
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION)
.build();
cluster.waitActive();
dfs = cluster.getFileSystem();
}
@After
public void tearDown() throws Exception {
if (cluster != null) {
cluster.shutdown();
cluster = null;
}
}
@Test
public void testPendingDeletion() throws Exception {
final Path foo = new Path("/foo");
DFSTestUtil.createFile(dfs, foo, BLOCKSIZE, REPLICATION, 0);
DFSTestUtil.waitForReplication(dfs, foo, REPLICATION, 10000);
// restart NN
cluster.restartNameNode(true);
InvalidateBlocks invalidateBlocks =
(InvalidateBlocks) Whitebox.getInternalState(cluster.getNamesystem()
.getBlockManager(), "invalidateBlocks");
InvalidateBlocks mockIb = Mockito.spy(invalidateBlocks);
// Return invalidation delay to delay the block's deletion
Mockito.doReturn(1L).when(mockIb).getInvalidationDelay();
Whitebox.setInternalState(cluster.getNamesystem().getBlockManager(),
"invalidateBlocks", mockIb);
dfs.delete(foo, true);
waitForNumPendingDeletionBlocks(REPLICATION);
Assert.assertEquals(0, cluster.getNamesystem().getBlocksTotal());
Assert.assertEquals(REPLICATION, cluster.getNamesystem()
.getPendingDeletionBlocks());
Assert.assertEquals(REPLICATION,
dfs.getPendingDeletionBlocksCount());
Mockito.doReturn(0L).when(mockIb).getInvalidationDelay();
waitForNumPendingDeletionBlocks(0);
Assert.assertEquals(0, cluster.getNamesystem().getBlocksTotal());
Assert.assertEquals(0, cluster.getNamesystem().getPendingDeletionBlocks());
Assert.assertEquals(0, dfs.getPendingDeletionBlocksCount());
long nnStarted = cluster.getNamesystem().getNNStartedTimeInMillis();
long blockDeletionStartTime = cluster.getNamesystem()
.getBlockDeletionStartTime();
Assert.assertTrue(String.format(
"Expect blockDeletionStartTime = %d > nnStarted = %d.",
blockDeletionStartTime, nnStarted), blockDeletionStartTime > nnStarted);
// test client protocol compatibility
Method method = DFSClient.class.
getDeclaredMethod("getStateByIndex", int.class);
method.setAccessible(true);
// get number of pending deletion blocks by its index
long validState = (Long) method.invoke(dfs.getClient(),
ClientProtocol.GET_STATS_PENDING_DELETION_BLOCKS_IDX);
// get an out of index value
long invalidState = (Long) method.invoke(dfs.getClient(),
ClientProtocol.STATS_ARRAY_LENGTH);
Assert.assertEquals(0, validState);
Assert.assertEquals(-1, invalidState);
}
/**
* Test whether we can delay the deletion of unknown blocks in DataNode's
* first several block reports.
*/
@Test
public void testPendingDeleteUnknownBlocks() throws Exception {
final int fileNum = 5; // 5 files
final Path[] files = new Path[fileNum];
final DataNodeProperties[] dnprops = new DataNodeProperties[REPLICATION];
// create a group of files, each file contains 1 block
for (int i = 0; i < fileNum; i++) {
files[i] = new Path("/file" + i);
DFSTestUtil.createFile(dfs, files[i], BLOCKSIZE, REPLICATION, i);
}
// wait until all DataNodes have replicas
waitForReplication();
for (int i = REPLICATION - 1; i >= 0; i--) {
dnprops[i] = cluster.stopDataNode(i);
}
Thread.sleep(2000);
// delete 2 files, we still have 3 files remaining so that we can cover
// every DN storage
for (int i = 0; i < 2; i++) {
dfs.delete(files[i], true);
}
// restart NameNode
cluster.restartNameNode(false);
InvalidateBlocks invalidateBlocks = (InvalidateBlocks) Whitebox
.getInternalState(cluster.getNamesystem().getBlockManager(),
"invalidateBlocks");
InvalidateBlocks mockIb = Mockito.spy(invalidateBlocks);
Mockito.doReturn(1L).when(mockIb).getInvalidationDelay();
Whitebox.setInternalState(cluster.getNamesystem().getBlockManager(),
"invalidateBlocks", mockIb);
Assert.assertEquals(0L, cluster.getNamesystem().getPendingDeletionBlocks());
// restart DataNodes
for (int i = 0; i < REPLICATION; i++) {
cluster.restartDataNode(dnprops[i]);
}
cluster.waitActive();
for (int i = 0; i < REPLICATION; i++) {
DataNodeTestUtils.triggerBlockReport(cluster.getDataNodes().get(i));
}
Thread.sleep(2000);
// make sure we have received block reports by checking the total block #
Assert.assertEquals(3, cluster.getNamesystem().getBlocksTotal());
Assert.assertEquals(4, cluster.getNamesystem().getPendingDeletionBlocks());
cluster.restartNameNode(true);
waitForNumPendingDeletionBlocks(0);
Assert.assertEquals(3, cluster.getNamesystem().getBlocksTotal());
Assert.assertEquals(0, cluster.getNamesystem().getPendingDeletionBlocks());
}
private long waitForReplication() throws Exception {
for (int i = 0; i < 10; i++) {
long ur = cluster.getNamesystem().getUnderReplicatedBlocks();
if (ur == 0) {
return 0;
} else {
Thread.sleep(1000);
}
}
return cluster.getNamesystem().getUnderReplicatedBlocks();
}
private void waitForNumPendingDeletionBlocks(final int numBlocks)
throws Exception {
GenericTestUtils.waitFor(new Supplier<Boolean>() {
@Override
public Boolean get() {
try {
cluster.triggerBlockReports();
if (cluster.getNamesystem().getPendingDeletionBlocks()
== numBlocks) {
return true;
}
} catch (Exception e) {
// Ignore the exception
}
return false;
}
}, 6000, 60000);
}
}