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HDFS-1330 and HADOOP-6889. Added additional unit tests. Contributed by John George.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1163463 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Matthew Foley 2011-08-31 00:58:19 +00:00
parent 8c9c8c72cc
commit 1cd3791172
3 changed files with 178 additions and 9 deletions
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1
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -1092,6 +1092,7 @@ Release 0.22.0 - Unreleased
(jghoman)
HDFS-1330. Make RPCs to DataNodes timeout. (hairong)
Added additional unit tests per HADOOP-6889. (John George via mattf)
HDFS-202. HDFS support of listLocatedStatus introduced in HADOOP-6870.
HDFS piggyback block locations to each file status when listing a

96
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSClientRetries.java
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@ -25,7 +25,12 @@
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.when;
import java.net.SocketTimeoutException;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.LongWritable;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.MessageDigest;
@ -44,6 +49,8 @@
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.protocol.DatanodeID;
import org.apache.hadoop.hdfs.protocol.Block;
import org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
@ -52,6 +59,11 @@
import org.apache.hadoop.hdfs.server.namenode.NotReplicatedYetException;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.ipc.Client;
import org.apache.hadoop.ipc.ProtocolSignature;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.net.NetUtils;
import org.mockito.internal.stubbing.answers.ThrowsException;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
@ -61,9 +73,51 @@
* properly in case of errors.
*/
public class TestDFSClientRetries extends TestCase {
private static final String ADDRESS = "0.0.0.0";
final static private int PING_INTERVAL = 1000;
final static private int MIN_SLEEP_TIME = 1000;
public static final Log LOG =
LogFactory.getLog(TestDFSClientRetries.class.getName());
final static private Configuration conf = new HdfsConfiguration();
private static class TestServer extends Server {
private boolean sleep;
private Class<? extends Writable> responseClass;
public TestServer(int handlerCount, boolean sleep) throws IOException {
this(handlerCount, sleep, LongWritable.class, null);
}
public TestServer(int handlerCount, boolean sleep,
Class<? extends Writable> paramClass,
Class<? extends Writable> responseClass)
throws IOException {
super(ADDRESS, 0, paramClass, handlerCount, conf);
this.sleep = sleep;
this.responseClass = responseClass;
}
@Override
public Writable call(Class<?> protocol, Writable param, long receiveTime)
throws IOException {
if (sleep) {
// sleep a bit
try {
Thread.sleep(PING_INTERVAL + MIN_SLEEP_TIME);
} catch (InterruptedException e) {}
}
if (responseClass != null) {
try {
return responseClass.newInstance();
} catch (Exception e) {
throw new RuntimeException(e);
}
} else {
return param; // echo param as result
}
}
}
// writes 'len' bytes of data to out.
private static void writeData(OutputStream out, int len) throws IOException {
byte [] buf = new byte[4096*16];
@ -80,8 +134,6 @@ private static void writeData(OutputStream out, int len) throws IOException {
*/
public void testWriteTimeoutAtDataNode() throws IOException,
InterruptedException {
Configuration conf = new HdfsConfiguration();
final int writeTimeout = 100; //milliseconds.
// set a very short write timeout for datanode, so that tests runs fast.
conf.setInt(DFSConfigKeys.DFS_DATANODE_SOCKET_WRITE_TIMEOUT_KEY, writeTimeout);
@ -136,7 +188,6 @@ public void testNotYetReplicatedErrors() throws IOException
{
final String exceptionMsg = "Nope, not replicated yet...";
final int maxRetries = 1; // Allow one retry (total of two calls)
Configuration conf = new HdfsConfiguration();
conf.setInt(DFSConfigKeys.DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_KEY, maxRetries);
NameNode mockNN = mock(NameNode.class);
@ -182,7 +233,6 @@ public void testFailuresArePerOperation() throws Exception
long fileSize = 4096;
Path file = new Path("/testFile");
Configuration conf = new Configuration();
// Set short retry timeout so this test runs faster
conf.setInt(DFSConfigKeys.DFS_CLIENT_RETRY_WINDOW_BASE, 10);
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).build();
@ -379,7 +429,6 @@ private boolean busyTest(int xcievers, int threads, int fileLen, int timeWin, in
long blockSize = 128*1024*1024; // DFS block size
int bufferSize = 4096;
Configuration conf = new HdfsConfiguration();
conf.setInt(DFSConfigKeys.DFS_DATANODE_MAX_RECEIVER_THREADS_KEY, xcievers);
conf.setInt(DFSConfigKeys.DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_KEY,
retries);
@ -540,7 +589,6 @@ public void testGetFileChecksum() throws Exception {
final String f = "/testGetFileChecksum";
final Path p = new Path(f);
final Configuration conf = new Configuration();
final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
try {
cluster.waitActive();
@ -566,5 +614,39 @@ public void testGetFileChecksum() throws Exception {
cluster.shutdown();
}
}
/** Test that timeout occurs when DN does not respond to RPC.
* Start up a server and ask it to sleep for n seconds. Make an
* RPC to the server and set rpcTimeout to less than n and ensure
* that socketTimeoutException is obtained
*/
public void testClientDNProtocolTimeout() throws IOException {
final Server server = new TestServer(1, true);
server.start();
final InetSocketAddress addr = NetUtils.getConnectAddress(server);
DatanodeID fakeDnId = new DatanodeID(
"localhost:" + addr.getPort(), "fake-storage", 0, addr.getPort());
ExtendedBlock b = new ExtendedBlock("fake-pool", new Block(12345L));
LocatedBlock fakeBlock = new LocatedBlock(b, new DatanodeInfo[0]);
ClientDatanodeProtocol proxy = null;
try {
proxy = DFSUtil.createClientDatanodeProtocolProxy(
fakeDnId, conf, 500, fakeBlock);
proxy.getReplicaVisibleLength(null);
fail ("Did not get expected exception: SocketTimeoutException");
} catch (SocketTimeoutException e) {
LOG.info("Got the expected Exception: SocketTimeoutException");
} finally {
if (proxy != null) {
RPC.stopProxy(proxy);
}
server.stop();
}
}
}

90
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestInterDatanodeProtocol.java
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@ -22,6 +22,20 @@
import java.io.IOException;
import java.util.List;
import java.net.InetSocketAddress;
import java.net.SocketTimeoutException;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.ipc.Client;
import org.apache.hadoop.ipc.ProtocolSignature;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
@ -38,6 +52,7 @@
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
import org.apache.hadoop.hdfs.protocol.RecoveryInProgressException;
import org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState;
import org.apache.hadoop.hdfs.protocol.DatanodeID;
import org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol;
import org.apache.hadoop.hdfs.server.protocol.ReplicaRecoveryInfo;
import org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock;
@ -48,6 +63,50 @@
* This tests InterDataNodeProtocol for block handling.
*/
public class TestInterDatanodeProtocol {
private static final String ADDRESS = "0.0.0.0";
final static private int PING_INTERVAL = 1000;
final static private int MIN_SLEEP_TIME = 1000;
private static Configuration conf = new HdfsConfiguration();
private static class TestServer extends Server {
private boolean sleep;
private Class<? extends Writable> responseClass;
public TestServer(int handlerCount, boolean sleep) throws IOException {
this(handlerCount, sleep, LongWritable.class, null);
}
public TestServer(int handlerCount, boolean sleep,
Class<? extends Writable> paramClass,
Class<? extends Writable> responseClass)
throws IOException {
super(ADDRESS, 0, paramClass, handlerCount, conf);
this.sleep = sleep;
this.responseClass = responseClass;
}
@Override
public Writable call(Class<?> protocol, Writable param, long receiveTime)
throws IOException {
if (sleep) {
// sleep a bit
try {
Thread.sleep(PING_INTERVAL + MIN_SLEEP_TIME);
} catch (InterruptedException e) {}
}
if (responseClass != null) {
try {
return responseClass.newInstance();
} catch (Exception e) {
throw new RuntimeException(e);
}
} else {
return param; // echo param as result
}
}
}
public static void checkMetaInfo(ExtendedBlock b, DataNode dn) throws IOException {
Block metainfo = dn.data.getStoredBlock(b.getBlockPoolId(), b.getBlockId());
Assert.assertEquals(b.getBlockId(), metainfo.getBlockId());
@ -73,7 +132,6 @@ public static LocatedBlock getLastLocatedBlock(
*/
@Test
public void testBlockMetaDataInfo() throws Exception {
Configuration conf = new HdfsConfiguration();
MiniDFSCluster cluster = null;
try {
@ -222,7 +280,6 @@ public void testInitReplicaRecovery() throws IOException {
* */
@Test
public void testUpdateReplicaUnderRecovery() throws IOException {
final Configuration conf = new HdfsConfiguration();
MiniDFSCluster cluster = null;
try {
@ -291,4 +348,33 @@ public void testUpdateReplicaUnderRecovery() throws IOException {
if (cluster != null) cluster.shutdown();
}
}
/** Test to verify that InterDatanode RPC timesout as expected when
* the server DN does not respond.
*/
@Test
public void testInterDNProtocolTimeout() throws Exception {
final Server server = new TestServer(1, true);
server.start();
final InetSocketAddress addr = NetUtils.getConnectAddress(server);
DatanodeID fakeDnId = new DatanodeID(
"localhost:" + addr.getPort(), "fake-storage", 0, addr.getPort());
DatanodeInfo dInfo = new DatanodeInfo(fakeDnId);
InterDatanodeProtocol proxy = null;
try {
proxy = DataNode.createInterDataNodeProtocolProxy(
dInfo, conf, 500);
proxy.initReplicaRecovery(null);
fail ("Expected SocketTimeoutException exception, but did not get.");
} catch (SocketTimeoutException e) {
DataNode.LOG.info("Got expected Exception: SocketTimeoutException" + e);
} finally {
if (proxy != null) {
RPC.stopProxy(proxy);
}
server.stop();
}
}
}