hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSStripedOutputStream.java - hadoop - Git at Google

 /**
  * 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 static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.Write.RECOVER_LEASE_ON_CLOSE_EXCEPTION_KEY;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.mockito.Mockito.doThrow;

 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.concurrent.TimeoutException;

 import org.apache.hadoop.fs.CreateFlag;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.mockito.Mockito;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.StreamCapabilities.StreamCapability;
 import org.apache.hadoop.hdfs.client.HdfsDataOutputStream.SyncFlag;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
 import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.io.erasurecode.CodecUtil;
 import org.apache.hadoop.io.erasurecode.ErasureCodeNative;
 import org.apache.hadoop.io.erasurecode.rawcoder.NativeRSRawErasureCoderFactory;
 import org.apache.hadoop.test.GenericTestUtils;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.Timeout;
 import org.slf4j.event.Level;

 public class TestDFSStripedOutputStream {
   public static final Logger LOG = LoggerFactory.getLogger(
       TestDFSStripedOutputStream.class);

   static {
     GenericTestUtils.setLogLevel(DFSOutputStream.LOG, Level.TRACE);
     GenericTestUtils.setLogLevel(DataStreamer.LOG, Level.TRACE);
   }

   private ErasureCodingPolicy ecPolicy;
   private int dataBlocks;
   private int parityBlocks;

   private MiniDFSCluster cluster;
   private DistributedFileSystem fs;
   private Configuration conf;
   private int cellSize;
   private final int stripesPerBlock = 4;
   private int blockSize;

   @Rule
   public Timeout globalTimeout = new Timeout(300000);

   public ErasureCodingPolicy getEcPolicy() {
     return StripedFileTestUtil.getDefaultECPolicy();
   }

   @Before
   public void setup() throws IOException {
     /*
      * Initialize erasure coding policy.
      */
     ecPolicy = getEcPolicy();
     dataBlocks = (short) ecPolicy.getNumDataUnits();
     parityBlocks = (short) ecPolicy.getNumParityUnits();
     cellSize = ecPolicy.getCellSize();
     blockSize = stripesPerBlock * cellSize;
     System.out.println("EC policy = " + ecPolicy);

     int numDNs = dataBlocks + parityBlocks + 2;
     conf = new Configuration();
     conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, blockSize);
     conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_REDUNDANCY_CONSIDERLOAD_KEY,
         false);
     conf.setInt(DFSConfigKeys.DFS_NAMENODE_REPLICATION_MAX_STREAMS_KEY, 0);
     if (ErasureCodeNative.isNativeCodeLoaded()) {
       conf.set(
           CodecUtil.IO_ERASURECODE_CODEC_RS_RAWCODERS_KEY,
           NativeRSRawErasureCoderFactory.CODER_NAME);
     }
     cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDNs).build();
     fs = cluster.getFileSystem();
     DFSTestUtil.enableAllECPolicies(fs);
     fs.getClient().setErasureCodingPolicy("/", ecPolicy.getName());
   }

   @After
   public void tearDown() {
     if (cluster != null) {
       cluster.shutdown();
       cluster = null;
     }
   }

   @Test
   public void testFileEmpty() throws Exception {
     testOneFile("/EmptyFile", 0);
   }

   @Test
   public void testFileSmallerThanOneCell1() throws Exception {
     testOneFile("/SmallerThanOneCell", 1);
   }

   @Test
   public void testFileSmallerThanOneCell2() throws Exception {
     testOneFile("/SmallerThanOneCell", cellSize - 1);
   }

   @Test
   public void testFileEqualsWithOneCell() throws Exception {
     testOneFile("/EqualsWithOneCell", cellSize);
   }

   @Test
   public void testFileSmallerThanOneStripe1() throws Exception {
     testOneFile("/SmallerThanOneStripe", cellSize * dataBlocks - 1);
   }

   @Test
   public void testFileSmallerThanOneStripe2() throws Exception {
     testOneFile("/SmallerThanOneStripe", cellSize + 123);
   }

   @Test
   public void testFileEqualsWithOneStripe() throws Exception {
     testOneFile("/EqualsWithOneStripe", cellSize * dataBlocks);
   }

   @Test
   public void testFileMoreThanOneStripe1() throws Exception {
     testOneFile("/MoreThanOneStripe1", cellSize * dataBlocks + 123);
   }

   @Test
   public void testFileMoreThanOneStripe2() throws Exception {
     testOneFile("/MoreThanOneStripe2", cellSize * dataBlocks
             + cellSize * dataBlocks + 123);
   }

   @Test
   public void testFileLessThanFullBlockGroup() throws Exception {
     testOneFile("/LessThanFullBlockGroup",
         cellSize * dataBlocks * (stripesPerBlock - 1) + cellSize);
   }

   @Test
   public void testFileFullBlockGroup() throws Exception {
     testOneFile("/FullBlockGroup", blockSize * dataBlocks);
   }

   @Test
   public void testFileMoreThanABlockGroup1() throws Exception {
     testOneFile("/MoreThanABlockGroup1", blockSize * dataBlocks + 123);
   }

   @Test
   public void testFileMoreThanABlockGroup2() throws Exception {
     testOneFile("/MoreThanABlockGroup2",
         blockSize * dataBlocks + cellSize+ 123);
   }

   @Test
   public void testFileMoreThanABlockGroup3() throws Exception {
     testOneFile("/MoreThanABlockGroup3",
         blockSize * dataBlocks * 3 + cellSize * dataBlocks
         + cellSize + 123);
   }

   /**
    * {@link DFSStripedOutputStream} doesn't support hflush() or hsync() yet.
    * This test is to make sure that DFSStripedOutputStream doesn't throw any
    * {@link UnsupportedOperationException} on hflush() or hsync() so as to
    * comply with output stream spec.
    *
    * @throws Exception
    */
   @Test
   public void testStreamFlush() throws Exception {
     final byte[] bytes = StripedFileTestUtil.generateBytes(blockSize *
         dataBlocks * 3 + cellSize * dataBlocks + cellSize + 123);
     try (FSDataOutputStream os = fs.create(new Path("/ec-file-1"))) {
       assertFalse(
           "DFSStripedOutputStream should not have hflush() capability yet!",
           os.hasCapability(StreamCapability.HFLUSH.getValue()));
       assertFalse(
           "DFSStripedOutputStream should not have hsync() capability yet!",
           os.hasCapability(StreamCapability.HSYNC.getValue()));
       try (InputStream is = new ByteArrayInputStream(bytes)) {
         IOUtils.copyBytes(is, os, bytes.length);
         os.hflush();
         IOUtils.copyBytes(is, os, bytes.length);
         os.hsync();
         IOUtils.copyBytes(is, os, bytes.length);
       }
       assertTrue("stream is not a DFSStripedOutputStream",
           os.getWrappedStream() instanceof DFSStripedOutputStream);
       final DFSStripedOutputStream dfssos =
           (DFSStripedOutputStream) os.getWrappedStream();
       dfssos.hsync(EnumSet.of(SyncFlag.UPDATE_LENGTH));
     }
   }

   private void testOneFile(String src, int writeBytes) throws Exception {
     src += "_" + writeBytes;
     Path testPath = new Path(src);

     byte[] bytes = StripedFileTestUtil.generateBytes(writeBytes);
     DFSTestUtil.writeFile(fs, testPath, new String(bytes));
     StripedFileTestUtil.waitBlockGroupsReported(fs, src);

     StripedFileTestUtil.checkData(fs, testPath, writeBytes,
         new ArrayList<DatanodeInfo>(), null, blockSize * dataBlocks);
   }

   @Test
   public void testFileBlockSizeSmallerThanCellSize() throws Exception {
     final Path path = new Path("testFileBlockSizeSmallerThanCellSize");
     final byte[] bytes = StripedFileTestUtil.generateBytes(cellSize * 2);
     try {
       DFSTestUtil.writeFile(fs, path, bytes, cellSize / 2);
       fail("Creating a file with block size smaller than "
           + "ec policy's cell size should fail");
     } catch (IOException expected) {
       LOG.info("Caught expected exception", expected);
       GenericTestUtils
           .assertExceptionContains("less than the cell size", expected);
     }
   }

   @Test
   public void testExceptionInCloseECFileWithRecoverLease() throws Exception {
     Configuration config = new Configuration();
     config.setBoolean(RECOVER_LEASE_ON_CLOSE_EXCEPTION_KEY, true);
     DFSClient client =
         new DFSClient(cluster.getNameNode(0).getNameNodeAddress(), config);
     DFSClient spyClient = Mockito.spy(client);
     DFSOutputStream dfsOutputStream =
         spyClient.create("/testExceptionInCloseECFileWithRecoverLease",
             FsPermission.getFileDefault(), EnumSet.of(CreateFlag.CREATE),
             (short) 3, 1024*1024, null, 1024, null);
     assertTrue("stream should be a DFSStripedOutputStream",
         dfsOutputStream instanceof DFSStripedOutputStream);
     DFSOutputStream spyDFSOutputStream = Mockito.spy(dfsOutputStream);
     doThrow(new IOException("Emulated IOException in close"))
         .when(spyDFSOutputStream).completeFile(Mockito.any());
     try {
       spyDFSOutputStream.close();
       fail();
     } catch (IOException ioe) {
       assertTrue(spyDFSOutputStream.isLeaseRecovered());
       waitForFileClosed("/testExceptionInCloseECFileWithRecoverLease");
       assertTrue(isFileClosed("/testExceptionInCloseECFileWithRecoverLease"));
     }
   }

   @Test
   public void testExceptionInCloseECFileWithoutRecoverLease() throws Exception {
     Configuration config = new Configuration();
     DFSClient client =
         new DFSClient(cluster.getNameNode(0).getNameNodeAddress(), config);
     DFSClient spyClient = Mockito.spy(client);
     DFSOutputStream dfsOutputStream =
         spyClient.create("/testExceptionInCloseECFileWithoutRecoverLease",
             FsPermission.getFileDefault(), EnumSet.of(CreateFlag.CREATE),
             (short) 3, 1024*1024, null, 1024, null);
     assertTrue("stream should be a DFSStripedOutputStream",
         dfsOutputStream instanceof DFSStripedOutputStream);
     DFSOutputStream spyDFSOutputStream = Mockito.spy(dfsOutputStream);
     doThrow(new IOException("Emulated IOException in close"))
         .when(spyDFSOutputStream).completeFile(Mockito.any());
     try {
       spyDFSOutputStream.close();
       fail();
     } catch (IOException ioe) {
       assertFalse(spyDFSOutputStream.isLeaseRecovered());
       try {
         waitForFileClosed("/testExceptionInCloseECFileWithoutRecoverLease");
       } catch (TimeoutException e) {
         assertFalse(
             isFileClosed("/testExceptionInCloseECFileWithoutRecoverLease"));
       }
     }
   }

   private boolean isFileClosed(String path) throws IOException {
     return cluster.getFileSystem().isFileClosed(new Path(path));
   }

   private void waitForFileClosed(String path) throws Exception {
     GenericTestUtils.waitFor(() -> {
       boolean closed;
       try {
         closed = isFileClosed(path);
       } catch (IOException e) {
         return false;
       }
       return closed;
     }, 1000, 5000);
   }
 }
	/**
	* 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 static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.Write.RECOVER_LEASE_ON_CLOSE_EXCEPTION_KEY;
	import static org.junit.Assert.assertFalse;
	import static org.junit.Assert.assertTrue;
	import static org.junit.Assert.fail;
	import static org.mockito.Mockito.doThrow;

	import java.io.ByteArrayInputStream;
	import java.io.IOException;
	import java.io.InputStream;
	import java.util.ArrayList;
	import java.util.EnumSet;
	import java.util.concurrent.TimeoutException;

	import org.apache.hadoop.fs.CreateFlag;
	import org.apache.hadoop.fs.permission.FsPermission;
	import org.mockito.Mockito;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;
	import org.apache.hadoop.conf.Configuration;
	import org.apache.hadoop.fs.FSDataOutputStream;
	import org.apache.hadoop.fs.Path;
	import org.apache.hadoop.fs.StreamCapabilities.StreamCapability;
	import org.apache.hadoop.hdfs.client.HdfsDataOutputStream.SyncFlag;
	import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
	import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
	import org.apache.hadoop.io.IOUtils;
	import org.apache.hadoop.io.erasurecode.CodecUtil;
	import org.apache.hadoop.io.erasurecode.ErasureCodeNative;
	import org.apache.hadoop.io.erasurecode.rawcoder.NativeRSRawErasureCoderFactory;
	import org.apache.hadoop.test.GenericTestUtils;
	import org.junit.After;
	import org.junit.Before;
	import org.junit.Rule;
	import org.junit.Test;
	import org.junit.rules.Timeout;
	import org.slf4j.event.Level;

	public class TestDFSStripedOutputStream {
	public static final Logger LOG = LoggerFactory.getLogger(
	TestDFSStripedOutputStream.class);

	static {
	GenericTestUtils.setLogLevel(DFSOutputStream.LOG, Level.TRACE);
	GenericTestUtils.setLogLevel(DataStreamer.LOG, Level.TRACE);
	}

	private ErasureCodingPolicy ecPolicy;
	private int dataBlocks;
	private int parityBlocks;

	private MiniDFSCluster cluster;
	private DistributedFileSystem fs;
	private Configuration conf;
	private int cellSize;
	private final int stripesPerBlock = 4;
	private int blockSize;

	@Rule
	public Timeout globalTimeout = new Timeout(300000);

	public ErasureCodingPolicy getEcPolicy() {
	return StripedFileTestUtil.getDefaultECPolicy();
	}

	@Before
	public void setup() throws IOException {
	/*
	* Initialize erasure coding policy.
	*/
	ecPolicy = getEcPolicy();
	dataBlocks = (short) ecPolicy.getNumDataUnits();
	parityBlocks = (short) ecPolicy.getNumParityUnits();
	cellSize = ecPolicy.getCellSize();
	blockSize = stripesPerBlock * cellSize;
	System.out.println("EC policy = " + ecPolicy);

	int numDNs = dataBlocks + parityBlocks + 2;
	conf = new Configuration();
	conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, blockSize);
	conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_REDUNDANCY_CONSIDERLOAD_KEY,
	false);
	conf.setInt(DFSConfigKeys.DFS_NAMENODE_REPLICATION_MAX_STREAMS_KEY, 0);
	if (ErasureCodeNative.isNativeCodeLoaded()) {
	conf.set(
	CodecUtil.IO_ERASURECODE_CODEC_RS_RAWCODERS_KEY,
	NativeRSRawErasureCoderFactory.CODER_NAME);
	}
	cluster = new MiniDFSCluster.Builder(conf).numDataNodes(numDNs).build();
	fs = cluster.getFileSystem();
	DFSTestUtil.enableAllECPolicies(fs);
	fs.getClient().setErasureCodingPolicy("/", ecPolicy.getName());
	}

	@After
	public void tearDown() {
	if (cluster != null) {
	cluster.shutdown();
	cluster = null;
	}
	}

	@Test
	public void testFileEmpty() throws Exception {
	testOneFile("/EmptyFile", 0);
	}

	@Test
	public void testFileSmallerThanOneCell1() throws Exception {
	testOneFile("/SmallerThanOneCell", 1);
	}

	@Test
	public void testFileSmallerThanOneCell2() throws Exception {
	testOneFile("/SmallerThanOneCell", cellSize - 1);
	}

	@Test
	public void testFileEqualsWithOneCell() throws Exception {
	testOneFile("/EqualsWithOneCell", cellSize);
	}

	@Test
	public void testFileSmallerThanOneStripe1() throws Exception {
	testOneFile("/SmallerThanOneStripe", cellSize * dataBlocks - 1);
	}

	@Test
	public void testFileSmallerThanOneStripe2() throws Exception {
	testOneFile("/SmallerThanOneStripe", cellSize + 123);
	}

	@Test
	public void testFileEqualsWithOneStripe() throws Exception {
	testOneFile("/EqualsWithOneStripe", cellSize * dataBlocks);
	}

	@Test
	public void testFileMoreThanOneStripe1() throws Exception {
	testOneFile("/MoreThanOneStripe1", cellSize * dataBlocks + 123);
	}

	@Test
	public void testFileMoreThanOneStripe2() throws Exception {
	testOneFile("/MoreThanOneStripe2", cellSize * dataBlocks
	+ cellSize * dataBlocks + 123);
	}

	@Test
	public void testFileLessThanFullBlockGroup() throws Exception {
	testOneFile("/LessThanFullBlockGroup",
	cellSize * dataBlocks * (stripesPerBlock - 1) + cellSize);
	}

	@Test
	public void testFileFullBlockGroup() throws Exception {
	testOneFile("/FullBlockGroup", blockSize * dataBlocks);
	}

	@Test
	public void testFileMoreThanABlockGroup1() throws Exception {
	testOneFile("/MoreThanABlockGroup1", blockSize * dataBlocks + 123);
	}

	@Test
	public void testFileMoreThanABlockGroup2() throws Exception {
	testOneFile("/MoreThanABlockGroup2",
	blockSize * dataBlocks + cellSize+ 123);
	}

	@Test
	public void testFileMoreThanABlockGroup3() throws Exception {
	testOneFile("/MoreThanABlockGroup3",
	blockSize * dataBlocks * 3 + cellSize * dataBlocks
	+ cellSize + 123);
	}

	/**
	* {@link DFSStripedOutputStream} doesn't support hflush() or hsync() yet.
	* This test is to make sure that DFSStripedOutputStream doesn't throw any
	* {@link UnsupportedOperationException} on hflush() or hsync() so as to
	* comply with output stream spec.
	*
	* @throws Exception
	*/
	@Test
	public void testStreamFlush() throws Exception {
	final byte[] bytes = StripedFileTestUtil.generateBytes(blockSize *
	dataBlocks * 3 + cellSize * dataBlocks + cellSize + 123);
	try (FSDataOutputStream os = fs.create(new Path("/ec-file-1"))) {
	assertFalse(
	"DFSStripedOutputStream should not have hflush() capability yet!",
	os.hasCapability(StreamCapability.HFLUSH.getValue()));
	assertFalse(
	"DFSStripedOutputStream should not have hsync() capability yet!",
	os.hasCapability(StreamCapability.HSYNC.getValue()));
	try (InputStream is = new ByteArrayInputStream(bytes)) {
	IOUtils.copyBytes(is, os, bytes.length);
	os.hflush();
	IOUtils.copyBytes(is, os, bytes.length);
	os.hsync();
	IOUtils.copyBytes(is, os, bytes.length);
	}
	assertTrue("stream is not a DFSStripedOutputStream",
	os.getWrappedStream() instanceof DFSStripedOutputStream);
	final DFSStripedOutputStream dfssos =
	(DFSStripedOutputStream) os.getWrappedStream();
	dfssos.hsync(EnumSet.of(SyncFlag.UPDATE_LENGTH));
	}
	}

	private void testOneFile(String src, int writeBytes) throws Exception {
	src += "_" + writeBytes;
	Path testPath = new Path(src);

	byte[] bytes = StripedFileTestUtil.generateBytes(writeBytes);
	DFSTestUtil.writeFile(fs, testPath, new String(bytes));
	StripedFileTestUtil.waitBlockGroupsReported(fs, src);

	StripedFileTestUtil.checkData(fs, testPath, writeBytes,
	new ArrayList<DatanodeInfo>(), null, blockSize * dataBlocks);
	}

	@Test
	public void testFileBlockSizeSmallerThanCellSize() throws Exception {
	final Path path = new Path("testFileBlockSizeSmallerThanCellSize");
	final byte[] bytes = StripedFileTestUtil.generateBytes(cellSize * 2);
	try {
	DFSTestUtil.writeFile(fs, path, bytes, cellSize / 2);
	fail("Creating a file with block size smaller than "
	+ "ec policy's cell size should fail");
	} catch (IOException expected) {
	LOG.info("Caught expected exception", expected);
	GenericTestUtils
	.assertExceptionContains("less than the cell size", expected);
	}
	}

	@Test
	public void testExceptionInCloseECFileWithRecoverLease() throws Exception {
	Configuration config = new Configuration();
	config.setBoolean(RECOVER_LEASE_ON_CLOSE_EXCEPTION_KEY, true);
	DFSClient client =
	new DFSClient(cluster.getNameNode(0).getNameNodeAddress(), config);
	DFSClient spyClient = Mockito.spy(client);
	DFSOutputStream dfsOutputStream =
	spyClient.create("/testExceptionInCloseECFileWithRecoverLease",
	FsPermission.getFileDefault(), EnumSet.of(CreateFlag.CREATE),
	(short) 3, 1024*1024, null, 1024, null);
	assertTrue("stream should be a DFSStripedOutputStream",
	dfsOutputStream instanceof DFSStripedOutputStream);
	DFSOutputStream spyDFSOutputStream = Mockito.spy(dfsOutputStream);
	doThrow(new IOException("Emulated IOException in close"))
	.when(spyDFSOutputStream).completeFile(Mockito.any());
	try {
	spyDFSOutputStream.close();
	fail();
	} catch (IOException ioe) {
	assertTrue(spyDFSOutputStream.isLeaseRecovered());
	waitForFileClosed("/testExceptionInCloseECFileWithRecoverLease");
	assertTrue(isFileClosed("/testExceptionInCloseECFileWithRecoverLease"));
	}
	}

	@Test
	public void testExceptionInCloseECFileWithoutRecoverLease() throws Exception {
	Configuration config = new Configuration();
	DFSClient client =
	new DFSClient(cluster.getNameNode(0).getNameNodeAddress(), config);
	DFSClient spyClient = Mockito.spy(client);
	DFSOutputStream dfsOutputStream =
	spyClient.create("/testExceptionInCloseECFileWithoutRecoverLease",
	FsPermission.getFileDefault(), EnumSet.of(CreateFlag.CREATE),
	(short) 3, 1024*1024, null, 1024, null);
	assertTrue("stream should be a DFSStripedOutputStream",
	dfsOutputStream instanceof DFSStripedOutputStream);
	DFSOutputStream spyDFSOutputStream = Mockito.spy(dfsOutputStream);
	doThrow(new IOException("Emulated IOException in close"))
	.when(spyDFSOutputStream).completeFile(Mockito.any());
	try {
	spyDFSOutputStream.close();
	fail();
	} catch (IOException ioe) {
	assertFalse(spyDFSOutputStream.isLeaseRecovered());
	try {
	waitForFileClosed("/testExceptionInCloseECFileWithoutRecoverLease");
	} catch (TimeoutException e) {
	assertFalse(
	isFileClosed("/testExceptionInCloseECFileWithoutRecoverLease"));
	}
	}
	}

	private boolean isFileClosed(String path) throws IOException {
	return cluster.getFileSystem().isFileClosed(new Path(path));
	}

	private void waitForFileClosed(String path) throws Exception {
	GenericTestUtils.waitFor(() -> {
	boolean closed;
	try {
	closed = isFileClosed(path);
	} catch (IOException e) {
	return false;
	}
	return closed;
	}, 1000, 5000);
	}
	}