package org.apache.hadoop.hdfs.server.namenode;
import java.util.Random;
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.MiniAvatarCluster;
import org.apache.hadoop.hdfs.protocol.AvatarConstants.Avatar;
import org.apache.hadoop.hdfs.server.common.HdfsConstants;
import org.junit.AfterClass;
import static org.junit.Assert.*;
import org.junit.BeforeClass;
import org.junit.Test;
public class TestAvatarLease {
private static Random random = new Random();
private static MiniAvatarCluster cluster;
private static FileSystem fs;
private static Configuration conf;
@BeforeClass
public static void setUpBeforeClass() throws Exception {
MiniAvatarCluster.createAndStartZooKeeper();
conf = new Configuration();
cluster = new MiniAvatarCluster(conf, 3, true, null, null);
fs = cluster.getFileSystem();
}
@AfterClass
public static void tearDownAfterClass() throws Exception {
cluster.shutDown();
MiniAvatarCluster.shutDownZooKeeper();
}
@Test
public void testLeaseAfterFailover() throws Exception {
String fileName = "/testLeaseAfterFailover";
FSDataOutputStream out = fs.create(new Path(fileName));
byte[] buffer = new byte[1024];
random.nextBytes(buffer);
out.write(buffer);
out.sync();
FSNamesystem primary = cluster.getPrimaryAvatar(0).avatar.namesystem;
// Prevents lease recovery to work.
cluster.shutDownDataNodes();
// Expire the lease.
primary.leaseManager.setLeasePeriod(0, 0);
primary.leaseManager.checkLeases();
cluster.killPrimary();
cluster.restartDataNodes(false);
AvatarNode standbyAvatar = cluster.getStandbyAvatar(0).avatar;
standbyAvatar.setAvatar(Avatar.ACTIVE);
String lease = standbyAvatar.namesystem.leaseManager
.getLeaseByPath(fileName).getHolder();
assertEquals(HdfsConstants.NN_RECOVERY_LEASEHOLDER, lease);
}
}