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TestReadRetries.java
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TestReadRetries.java
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/**
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.ozone.client.rpc;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.UUID;
import org.apache.hadoop.hdds.client.ReplicationFactor;
import org.apache.hadoop.hdds.client.ReplicationType;
import org.apache.hadoop.hdds.conf.OzoneConfiguration;
import org.apache.hadoop.hdds.protocol.DatanodeDetails;
import org.apache.hadoop.hdds.protocol.proto.HddsProtos;
import org.apache.hadoop.hdds.scm.ScmConfigKeys;
import org.apache.hadoop.hdds.scm.XceiverClientFactory;
import org.apache.hadoop.hdds.scm.XceiverClientRatis;
import org.apache.hadoop.hdds.scm.XceiverClientSpi;
import org.apache.hadoop.hdds.scm.container.ContainerID;
import org.apache.hadoop.hdds.scm.container.ContainerInfo;
import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
import org.apache.hadoop.hdds.scm.protocolPB.StorageContainerLocationProtocolClientSideTranslatorPB;
import org.apache.hadoop.ozone.MiniOzoneCluster;
import org.apache.hadoop.ozone.client.ObjectStore;
import org.apache.hadoop.ozone.client.OzoneBucket;
import org.apache.hadoop.ozone.client.OzoneClient;
import org.apache.hadoop.ozone.client.OzoneClientFactory;
import org.apache.hadoop.ozone.client.OzoneKey;
import org.apache.hadoop.ozone.client.OzoneKeyDetails;
import org.apache.hadoop.ozone.client.OzoneKeyLocation;
import org.apache.hadoop.ozone.client.OzoneVolume;
import org.apache.hadoop.ozone.client.io.KeyOutputStream;
import org.apache.hadoop.ozone.client.io.OzoneInputStream;
import org.apache.hadoop.ozone.client.io.OzoneOutputStream;
import org.apache.hadoop.ozone.om.OMConfigKeys;
import org.apache.hadoop.ozone.om.OzoneManager;
import org.apache.hadoop.ozone.om.helpers.OmKeyArgs;
import org.apache.hadoop.ozone.om.helpers.OmKeyLocationInfo;
import org.apache.hadoop.ozone.om.helpers.OzoneFileStatus;
import org.apache.hadoop.ozone.om.request.TestOMRequestUtils;
import org.junit.After;
import org.junit.Assert;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.junit.Assert.fail;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.Timeout;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.rules.ExpectedException;
/**
* Test read retries from multiple nodes in the pipeline.
*/
@RunWith(Parameterized.class)
public class TestReadRetries {
/**
* Set a timeout for each test.
*/
@Rule
public Timeout timeout = Timeout.seconds(300);
@Rule
public ExpectedException thrown = ExpectedException.none();
private MiniOzoneCluster cluster = null;
private OzoneClient ozClient = null;
private ObjectStore store = null;
private OzoneManager ozoneManager;
private StorageContainerLocationProtocolClientSideTranslatorPB
storageContainerLocationClient;
private static final String SCM_ID = UUID.randomUUID().toString();
private String layoutVersion;
public TestReadRetries(String layoutVersion) {
this.layoutVersion = layoutVersion;
}
@Parameterized.Parameters
public static Collection<Object[]> data() {
return Arrays.asList(
new Object[]{OMConfigKeys.OZONE_OM_METADATA_LAYOUT_DEFAULT },
new Object[]{OMConfigKeys.OZONE_OM_METADATA_LAYOUT_PREFIX });
}
/**
* Create a MiniOzoneCluster for testing.
* @throws Exception
*/
@Before
public void init() throws Exception {
OzoneConfiguration conf = new OzoneConfiguration();
conf.setInt(ScmConfigKeys.OZONE_SCM_PIPELINE_OWNER_CONTAINER_COUNT, 1);
TestOMRequestUtils.configureFSOptimizedPaths(conf,
true, layoutVersion);
cluster = MiniOzoneCluster.newBuilder(conf)
.setNumDatanodes(3)
.setScmId(SCM_ID)
.build();
cluster.waitForClusterToBeReady();
cluster.waitForPipelineTobeReady(HddsProtos.ReplicationFactor.THREE,
180000);
ozClient = OzoneClientFactory.getRpcClient(conf);
store = ozClient.getObjectStore();
storageContainerLocationClient =
cluster.getStorageContainerLocationClient();
ozoneManager = cluster.getOzoneManager();
}
/**
* Close OzoneClient and shutdown MiniOzoneCluster.
*/
@After
public void shutdown() throws IOException {
if(ozClient != null) {
ozClient.close();
}
if (storageContainerLocationClient != null) {
storageContainerLocationClient.close();
}
if (cluster != null) {
cluster.shutdown();
}
}
@Test
public void testPutKeyAndGetKeyThreeNodes()
throws Exception {
String volumeName = UUID.randomUUID().toString();
String bucketName = UUID.randomUUID().toString();
String value = "sample value";
store.createVolume(volumeName);
OzoneVolume volume = store.getVolume(volumeName);
volume.createBucket(bucketName);
OzoneBucket bucket = volume.getBucket(bucketName);
String keyName = "a/b/c/" + UUID.randomUUID().toString();
OzoneOutputStream out = bucket
.createKey(keyName, value.getBytes(UTF_8).length, ReplicationType.RATIS,
ReplicationFactor.THREE, new HashMap<>());
KeyOutputStream groupOutputStream =
(KeyOutputStream) out.getOutputStream();
XceiverClientFactory factory = groupOutputStream.getXceiverClientFactory();
out.write(value.getBytes(UTF_8));
out.close();
// First, confirm the key info from the client matches the info in OM.
OmKeyArgs.Builder builder = new OmKeyArgs.Builder();
builder.setVolumeName(volumeName).setBucketName(bucketName)
.setKeyName(keyName).setRefreshPipeline(true);
OmKeyLocationInfo keyInfo = ozoneManager.lookupKey(builder.build()).
getKeyLocationVersions().get(0).getBlocksLatestVersionOnly().get(0);
long containerID = keyInfo.getContainerID();
long localID = keyInfo.getLocalID();
OzoneKeyDetails keyDetails = bucket.getKey(keyName);
Assert.assertEquals(keyName, keyDetails.getName());
List<OzoneKeyLocation> keyLocations = keyDetails.getOzoneKeyLocations();
Assert.assertEquals(1, keyLocations.size());
Assert.assertEquals(containerID, keyLocations.get(0).getContainerID());
Assert.assertEquals(localID, keyLocations.get(0).getLocalID());
// Make sure that the data size matched.
Assert.assertEquals(value.getBytes(UTF_8).length,
keyLocations.get(0).getLength());
ContainerInfo container = cluster.getStorageContainerManager()
.getContainerManager().getContainer(ContainerID.valueOf(containerID));
Pipeline pipeline = cluster.getStorageContainerManager()
.getPipelineManager().getPipeline(container.getPipelineID());
List<DatanodeDetails> datanodes = pipeline.getNodes();
DatanodeDetails datanodeDetails = datanodes.get(0);
Assert.assertNotNull(datanodeDetails);
XceiverClientSpi clientSpi = factory.acquireClient(pipeline);
Assert.assertTrue(clientSpi instanceof XceiverClientRatis);
XceiverClientRatis ratisClient = (XceiverClientRatis)clientSpi;
ratisClient.watchForCommit(keyInfo.getBlockCommitSequenceId());
// shutdown the datanode
cluster.shutdownHddsDatanode(datanodeDetails);
// try to read, this should be successful
readKey(bucket, keyName, value);
// read intermediate directory
verifyIntermediateDir(bucket, "a/b/c");
// shutdown the second datanode
datanodeDetails = datanodes.get(1);
cluster.shutdownHddsDatanode(datanodeDetails);
// we still should be able to read via Standalone protocol
// try to read
readKey(bucket, keyName, value);
// shutdown the 3rd datanode
datanodeDetails = datanodes.get(2);
cluster.shutdownHddsDatanode(datanodeDetails);
try {
// try to read
readKey(bucket, keyName, value);
fail("Expected exception not thrown");
} catch (IOException e) {
// it should throw an ioException as none of the servers
// are available
}
factory.releaseClient(clientSpi, false);
}
private void verifyIntermediateDir(OzoneBucket bucket, String dir)
throws IOException {
OzoneFileStatus fileStatus = bucket.getFileStatus(dir);
Assert.assertTrue(fileStatus.isDirectory());
Assert.assertEquals(dir, fileStatus.getTrimmedName());
}
private void readKey(OzoneBucket bucket, String keyName, String data)
throws IOException {
OzoneKey key = bucket.getKey(keyName);
Assert.assertEquals(keyName, key.getName());
OzoneInputStream is = bucket.readKey(keyName);
byte[] fileContent = new byte[data.getBytes(UTF_8).length];
is.read(fileContent);
is.close();
}
}