package org.apache.hadoop.hdfs.server.namenode;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.junit.AfterClass;
import static org.junit.Assert.*;
import org.junit.BeforeClass;
import org.junit.Test;
public class TestEmptyAbandonBlock {
private static MiniDFSCluster cluster;
private static Configuration conf;
@BeforeClass
public static void setUpBeforeClass() throws Exception {
conf = new Configuration();
cluster = new MiniDFSCluster(conf, 3, true, null);
}
@AfterClass
public static void tearDownAfterClass() throws Exception {
cluster.shutdown();
}
@Test
public void testAbandon() throws Exception {
NameNode nn = cluster.getNameNode();
DistributedFileSystem fs = (DistributedFileSystem) cluster.getFileSystem();
String fileName = "/testAbandon";
fs.create(new Path(fileName));
LocatedBlock lbk = nn.addBlock(fileName, fs.getClient().getClientName());
INodeFileUnderConstruction cons = (INodeFileUnderConstruction) nn.namesystem.dir
.getInode(fileName);
cons.setTargets(null);
nn.abandonBlock(lbk.getBlock(), fileName, fs.getClient().getClientName());
assertEquals(0, nn.getBlockLocations(fileName, 0, Long.MAX_VALUE)
.locatedBlockCount());
}
}