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* Licensed to the Apache Software Foundation (ASF) under one
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* 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,
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* See the License for the specific language governing permissions and
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package org.apache.hadoop.hdfs.server.namenode.snapshot;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSOutputStream;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
import org.apache.hadoop.io.IOUtils;
import static org.apache.hadoop.test.GenericTestUtils.assertExceptionContains;
import org.junit.Test;
public class TestUpdatePipelineWithSnapshots {
// Regression test for HDFS-6647.
@Test
public void testUpdatePipelineAfterDelete() throws Exception {
Configuration conf = new HdfsConfiguration();
Path file = new Path("/test-file");
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).build();
try {
FileSystem fs = cluster.getFileSystem();
NamenodeProtocols namenode = cluster.getNameNodeRpc();
DFSOutputStream out = null;
try {
// Create a file and make sure a block is allocated for it.
out = (DFSOutputStream)(fs.create(file).
getWrappedStream());
out.write(1);
out.hflush();
// Create a snapshot that includes the file.
SnapshotTestHelper.createSnapshot((DistributedFileSystem) fs,
new Path("/"), "s1");
// Grab the block info of this file for later use.
FSDataInputStream in = null;
ExtendedBlock oldBlock = null;
try {
in = fs.open(file);
oldBlock = DFSTestUtil.getAllBlocks(in).get(0).getBlock();
} finally {
IOUtils.closeStream(in);
}
// Allocate a new block ID/gen stamp so we can simulate pipeline
// recovery.
String clientName = ((DistributedFileSystem)fs).getClient()
.getClientName();
LocatedBlock newLocatedBlock = namenode.updateBlockForPipeline(
oldBlock, clientName);
ExtendedBlock newBlock = new ExtendedBlock(oldBlock.getBlockPoolId(),
oldBlock.getBlockId(), oldBlock.getNumBytes(),
newLocatedBlock.getBlock().getGenerationStamp());
// Delete the file from the present FS. It will still exist the
// previously-created snapshot. This will log an OP_DELETE for the
// file in question.
fs.delete(file, true);
// Simulate a pipeline recovery, wherein a new block is allocated
// for the existing block, resulting in an OP_UPDATE_BLOCKS being
// logged for the file in question.
try {
namenode.updatePipeline(clientName, oldBlock, newBlock,
newLocatedBlock.getLocations(), newLocatedBlock.getStorageIDs());
} catch (IOException ioe) {
// normal
assertExceptionContains(
"does not exist or it is not under construction", ioe);
}
// Make sure the NN can restart with the edit logs as we have them now.
cluster.restartNameNode(true);
} finally {
IOUtils.closeStream(out);
}
} finally {
cluster.shutdown();
}
}
}