/**
* 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.server.namenode;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.util.Collections;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystemTestHelper;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.namenode.NNStorage.NameNodeFile;
import org.apache.hadoop.http.HttpServer2;
import org.apache.hadoop.http.HttpServerFunctionalTest;
import org.apache.hadoop.test.PathUtils;
import org.apache.hadoop.util.StringUtils;
import org.junit.Test;
import org.mockito.Mockito;
import com.google.common.collect.ImmutableList;
public class TestTransferFsImage {
private static final File TEST_DIR = PathUtils.getTestDir(TestTransferFsImage.class);
/**
* Regression test for HDFS-1997. Test that, if an exception
* occurs on the client side, it is properly reported as such,
* and reported to the associated NNStorage object.
*/
@Test
public void testClientSideException() throws IOException {
Configuration conf = new HdfsConfiguration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
.numDataNodes(0).build();
NNStorage mockStorage = Mockito.mock(NNStorage.class);
List<File> localPath = Collections.singletonList(
new File("/xxxxx-does-not-exist/blah"));
try {
URL fsName = DFSUtil.getInfoServer(
cluster.getNameNode().getServiceRpcAddress(), conf,
DFSUtil.getHttpClientScheme(conf)).toURL();
String id = "getimage=1&txid=0";
TransferFsImage.getFileClient(fsName, id, localPath, mockStorage, false);
fail("Didn't get an exception!");
} catch (IOException ioe) {
Mockito.verify(mockStorage).reportErrorOnFile(localPath.get(0));
assertTrue(
"Unexpected exception: " + StringUtils.stringifyException(ioe),
ioe.getMessage().contains("Unable to download to any storage"));
} finally {
cluster.shutdown();
}
}
/**
* Similar to the above test, except that there are multiple local files
* and one of them can be saved.
*/
@Test
public void testClientSideExceptionOnJustOneDir() throws IOException {
Configuration conf = new HdfsConfiguration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
.numDataNodes(0).build();
NNStorage mockStorage = Mockito.mock(NNStorage.class);
List<File> localPaths = ImmutableList.of(
new File("/xxxxx-does-not-exist/blah"),
new File(TEST_DIR, "testfile")
);
try {
URL fsName = DFSUtil.getInfoServer(
cluster.getNameNode().getServiceRpcAddress(), conf,
DFSUtil.getHttpClientScheme(conf)).toURL();
String id = "getimage=1&txid=0";
TransferFsImage.getFileClient(fsName, id, localPaths, mockStorage, false);
Mockito.verify(mockStorage).reportErrorOnFile(localPaths.get(0));
assertTrue("The valid local file should get saved properly",
localPaths.get(1).length() > 0);
} finally {
cluster.shutdown();
}
}
/**
* Test to verify the read timeout
*/
@Test(timeout = 5000)
public void testGetImageTimeout() throws Exception {
HttpServer2 testServer = HttpServerFunctionalTest.createServer("hdfs");
try {
testServer.addServlet("ImageTransfer", ImageServlet.PATH_SPEC,
TestImageTransferServlet.class);
testServer.start();
URL serverURL = HttpServerFunctionalTest.getServerURL(testServer);
TransferFsImage.timeout = 2000;
try {
TransferFsImage.getFileClient(serverURL, "txid=1", null,
null, false);
fail("TransferImage Should fail with timeout");
} catch (SocketTimeoutException e) {
assertEquals("Read should timeout", "Read timed out", e.getMessage());
}
} finally {
if (testServer != null) {
testServer.stop();
}
}
}
/**
* Test to verify the timeout of Image upload
*/
@Test(timeout = 10000)
public void testImageUploadTimeout() throws Exception {
Configuration conf = new HdfsConfiguration();
NNStorage mockStorage = Mockito.mock(NNStorage.class);
HttpServer2 testServer = HttpServerFunctionalTest.createServer("hdfs");
try {
testServer.addServlet("ImageTransfer", ImageServlet.PATH_SPEC,
TestImageTransferServlet.class);
testServer.start();
URL serverURL = HttpServerFunctionalTest.getServerURL(testServer);
// set the timeout here, otherwise it will take default.
TransferFsImage.timeout = 2000;
File tmpDir = new File(new FileSystemTestHelper().getTestRootDir());
tmpDir.mkdirs();
File mockImageFile = File.createTempFile("image", "", tmpDir);
FileOutputStream imageFile = new FileOutputStream(mockImageFile);
imageFile.write("data".getBytes());
imageFile.close();
Mockito.when(
mockStorage.findImageFile(Mockito.any(NameNodeFile.class),
Mockito.anyLong())).thenReturn(mockImageFile);
Mockito.when(mockStorage.toColonSeparatedString()).thenReturn(
"storage:info:string");
try {
TransferFsImage.uploadImageFromStorage(serverURL, conf, mockStorage,
NameNodeFile.IMAGE, 1L);
fail("TransferImage Should fail with timeout");
} catch (SocketTimeoutException e) {
assertEquals("Upload should timeout", "Read timed out", e.getMessage());
}
} finally {
testServer.stop();
}
}
public static class TestImageTransferServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
synchronized (this) {
try {
wait(5000);
} catch (InterruptedException e) {
// Ignore
}
}
}
@Override
protected void doPut(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
synchronized (this) {
try {
wait(5000);
} catch (InterruptedException e) {
// Ignore
}
}
}
}
}