/**
* 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.DataOutputStream;
import java.io.IOException;
import java.security.PrivilegedExceptionAction;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.security.token.SecretManager.InvalidToken;
import org.apache.hadoop.security.UserGroupInformation;
import org.junit.Assert;
import org.junit.Test;
import org.mockito.Mockito;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.when;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.doNothing;
public class TestLease {
static boolean hasLease(MiniDFSCluster cluster, Path src) {
return NameNodeAdapter.getLeaseManager(cluster.getNamesystem()
).getLeaseByPath(src.toString()) != null;
}
static final String dirString = "/test/lease";
final Path dir = new Path(dirString);
static final Log LOG = LogFactory.getLog(TestLease.class);
Configuration conf = new HdfsConfiguration();
@Test
public void testLeaseAbort() throws Exception {
MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
try {
cluster.waitActive();
NamenodeProtocols preSpyNN = cluster.getNameNodeRpc();
NamenodeProtocols spyNN = spy(preSpyNN);
DFSClient dfs = new DFSClient(null, spyNN, conf, null);
byte[] buf = new byte[1024];
FSDataOutputStream c_out = createFsOut(dfs, dirString + "c");
c_out.write(buf, 0, 1024);
c_out.close();
DFSInputStream c_in = dfs.open(dirString + "c");
FSDataOutputStream d_out = createFsOut(dfs, dirString + "d");
// stub the renew method.
doThrow(new RemoteException(InvalidToken.class.getName(),
"Your token is worthless")).when(spyNN).renewLease(anyString());
// We don't need to wait the lease renewer thread to act.
// call renewLease() manually.
// make it look like lease has already expired.
dfs.lastLeaseRenewal = System.currentTimeMillis() - 300000;
dfs.renewLease();
// this should not work.
try {
d_out.write(buf, 0, 1024);
d_out.close();
Assert.fail("Write did not fail even after the fatal lease renewal failure");
} catch (IOException e) {
LOG.info("Write failed as expected. ", e);
}
// unstub
doNothing().when(spyNN).renewLease(anyString());
// existing input streams should work
try {
int num = c_in.read(buf, 0, 1);
if (num != 1) {
Assert.fail("Failed to read 1 byte");
}
c_in.close();
} catch (IOException e) {
LOG.error("Read failed with ", e);
Assert.fail("Read after lease renewal failure failed");
}
// new file writes should work.
try {
c_out = createFsOut(dfs, dirString + "c");
c_out.write(buf, 0, 1024);
c_out.close();
} catch (IOException e) {
LOG.error("Write failed with ", e);
Assert.fail("Write failed");
}
} finally {
cluster.shutdown();
}
}
@Test
public void testLease() throws Exception {
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
try {
FileSystem fs = cluster.getFileSystem();
Assert.assertTrue(fs.mkdirs(dir));
Path a = new Path(dir, "a");
Path b = new Path(dir, "b");
DataOutputStream a_out = fs.create(a);
a_out.writeBytes("something");
Assert.assertTrue(hasLease(cluster, a));
Assert.assertTrue(!hasLease(cluster, b));
DataOutputStream b_out = fs.create(b);
b_out.writeBytes("something");
Assert.assertTrue(hasLease(cluster, a));
Assert.assertTrue(hasLease(cluster, b));
a_out.close();
b_out.close();
Assert.assertTrue(!hasLease(cluster, a));
Assert.assertTrue(!hasLease(cluster, b));
fs.delete(dir, true);
} finally {
if (cluster != null) {cluster.shutdown();}
}
}
@Test
public void testFactory() throws Exception {
final String[] groups = new String[]{"supergroup"};
final UserGroupInformation[] ugi = new UserGroupInformation[3];
for(int i = 0; i < ugi.length; i++) {
ugi[i] = UserGroupInformation.createUserForTesting("user" + i, groups);
}
final Configuration conf = new Configuration();
final DFSClient c1 = createDFSClientAs(ugi[0], conf);
final DFSClient c2 = createDFSClientAs(ugi[0], conf);
Assert.assertEquals(c1.leaserenewer, c2.leaserenewer);
final DFSClient c3 = createDFSClientAs(ugi[1], conf);
Assert.assertTrue(c1.leaserenewer != c3.leaserenewer);
final DFSClient c4 = createDFSClientAs(ugi[1], conf);
Assert.assertEquals(c3.leaserenewer, c4.leaserenewer);
final DFSClient c5 = createDFSClientAs(ugi[2], conf);
Assert.assertTrue(c1.leaserenewer != c5.leaserenewer);
Assert.assertTrue(c3.leaserenewer != c5.leaserenewer);
}
private FSDataOutputStream createFsOut(DFSClient dfs, String path)
throws IOException {
return new FSDataOutputStream(dfs.create(path, true), null);
}
static final ClientProtocol mcp = Mockito.mock(ClientProtocol.class);
static public DFSClient createDFSClientAs(UserGroupInformation ugi,
final Configuration conf) throws Exception {
return ugi.doAs(new PrivilegedExceptionAction<DFSClient>() {
@Override
public DFSClient run() throws Exception {
return new DFSClient(null, mcp, conf, null);
}
});
}
}