HDFS-16286. Add a debug tool to verify the correctness of erasure coding on file (#3593)
This commit is contained in:
daimin
GitHub
parent
6c6d1b64d4
commit
a21895a5b3
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@ -24,15 +24,41 @@ import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.net.InetSocketAddress;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.nio.ByteBuffer;
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import java.nio.channels.FileChannel;
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import java.nio.file.Files;
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import java.util.ArrayList;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.concurrent.CompletionService;
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import java.util.concurrent.ExecutorCompletionService;
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import java.util.concurrent.Future;
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import java.util.concurrent.LinkedBlockingQueue;
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import java.util.concurrent.TimeUnit;
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import org.apache.hadoop.fs.FileStatus;
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import org.apache.hadoop.hdfs.BlockReader;
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import org.apache.hadoop.hdfs.DFSClient;
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import org.apache.hadoop.hdfs.DFSConfigKeys;
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import org.apache.hadoop.hdfs.client.impl.BlockReaderRemote;
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import org.apache.hadoop.hdfs.net.Peer;
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import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
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import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
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import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
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import org.apache.hadoop.hdfs.protocol.LocatedBlock;
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import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
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import org.apache.hadoop.hdfs.protocol.LocatedStripedBlock;
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import org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier;
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import org.apache.hadoop.hdfs.server.datanode.CachingStrategy;
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import org.apache.hadoop.hdfs.util.StripedBlockUtil;
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import org.apache.hadoop.io.erasurecode.CodecUtil;
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import org.apache.hadoop.io.erasurecode.ErasureCoderOptions;
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import org.apache.hadoop.io.erasurecode.rawcoder.RawErasureEncoder;
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import org.apache.hadoop.net.NetUtils;
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import org.apache.hadoop.security.token.Token;
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import org.apache.hadoop.thirdparty.com.google.common.util.concurrent.Uninterruptibles;
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import org.apache.hadoop.HadoopIllegalArgumentException;
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import org.apache.hadoop.classification.InterfaceAudience;
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@ -69,6 +95,7 @@ public class DebugAdmin extends Configured implements Tool {
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new VerifyMetaCommand(),
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new ComputeMetaCommand(),
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new RecoverLeaseCommand(),
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new VerifyECCommand(),
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new HelpCommand()
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};
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@ -387,6 +414,209 @@ public class DebugAdmin extends Configured implements Tool {
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}
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}
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/**
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* The command for verifying the correctness of erasure coding on an erasure coded file.
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*/
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private class VerifyECCommand extends DebugCommand {
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private DFSClient client;
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private int dataBlkNum;
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private int parityBlkNum;
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private int cellSize;
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private boolean useDNHostname;
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private CachingStrategy cachingStrategy;
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private int stripedReadBufferSize;
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private CompletionService<Integer> readService;
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private RawErasureEncoder encoder;
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private BlockReader[] blockReaders;
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VerifyECCommand() {
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super("verifyEC",
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"verifyEC -file <file>",
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" Verify HDFS erasure coding on all block groups of the file.");
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}
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int run(List<String> args) throws IOException {
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if (args.size() < 2) {
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System.out.println(usageText);
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System.out.println(helpText + System.lineSeparator());
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return 1;
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}
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String file = StringUtils.popOptionWithArgument("-file", args);
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Path path = new Path(file);
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DistributedFileSystem dfs = AdminHelper.getDFS(getConf());
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this.client = dfs.getClient();
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FileStatus fileStatus;
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try {
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fileStatus = dfs.getFileStatus(path);
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} catch (FileNotFoundException e) {
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System.err.println("File " + file + " does not exist.");
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return 1;
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}
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if (!fileStatus.isFile()) {
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System.err.println("File " + file + " is not a regular file.");
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return 1;
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}
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if (!dfs.isFileClosed(path)) {
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System.err.println("File " + file + " is not closed.");
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return 1;
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}
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this.useDNHostname = getConf().getBoolean(DFSConfigKeys.DFS_DATANODE_USE_DN_HOSTNAME,
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DFSConfigKeys.DFS_DATANODE_USE_DN_HOSTNAME_DEFAULT);
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this.cachingStrategy = CachingStrategy.newDefaultStrategy();
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this.stripedReadBufferSize = getConf().getInt(
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DFSConfigKeys.DFS_DN_EC_RECONSTRUCTION_STRIPED_READ_BUFFER_SIZE_KEY,
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DFSConfigKeys.DFS_DN_EC_RECONSTRUCTION_STRIPED_READ_BUFFER_SIZE_DEFAULT);
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LocatedBlocks locatedBlocks = client.getLocatedBlocks(file, 0, fileStatus.getLen());
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if (locatedBlocks.getErasureCodingPolicy() == null) {
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System.err.println("File " + file + " is not erasure coded.");
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return 1;
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}
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ErasureCodingPolicy ecPolicy = locatedBlocks.getErasureCodingPolicy();
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this.dataBlkNum = ecPolicy.getNumDataUnits();
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this.parityBlkNum = ecPolicy.getNumParityUnits();
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this.cellSize = ecPolicy.getCellSize();
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this.encoder = CodecUtil.createRawEncoder(getConf(), ecPolicy.getCodecName(),
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new ErasureCoderOptions(
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ecPolicy.getNumDataUnits(), ecPolicy.getNumParityUnits()));
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int blockNum = dataBlkNum + parityBlkNum;
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this.readService = new ExecutorCompletionService<>(
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DFSUtilClient.getThreadPoolExecutor(blockNum, blockNum, 60,
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new LinkedBlockingQueue<>(), "read-", false));
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this.blockReaders = new BlockReader[dataBlkNum + parityBlkNum];
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for (LocatedBlock locatedBlock : locatedBlocks.getLocatedBlocks()) {
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System.out.println("Checking EC block group: blk_" + locatedBlock.getBlock().getBlockId());
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LocatedStripedBlock blockGroup = (LocatedStripedBlock) locatedBlock;
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try {
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verifyBlockGroup(blockGroup);
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System.out.println("Status: OK");
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} catch (Exception e) {
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System.err.println("Status: ERROR, message: " + e.getMessage());
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return 1;
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} finally {
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closeBlockReaders();
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}
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}
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System.out.println("\nAll EC block group status: OK");
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return 0;
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}
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private void verifyBlockGroup(LocatedStripedBlock blockGroup) throws Exception {
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final LocatedBlock[] indexedBlocks = StripedBlockUtil.parseStripedBlockGroup(blockGroup,
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cellSize, dataBlkNum, parityBlkNum);
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int blockNumExpected = Math.min(dataBlkNum,
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(int) ((blockGroup.getBlockSize() - 1) / cellSize + 1)) + parityBlkNum;
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if (blockGroup.getBlockIndices().length < blockNumExpected) {
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throw new Exception("Block group is under-erasure-coded.");
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}
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long maxBlockLen = 0L;
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DataChecksum checksum = null;
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for (int i = 0; i < dataBlkNum + parityBlkNum; i++) {
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LocatedBlock block = indexedBlocks[i];
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if (block == null) {
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blockReaders[i] = null;
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continue;
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}
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if (block.getBlockSize() > maxBlockLen) {
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maxBlockLen = block.getBlockSize();
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}
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BlockReader blockReader = createBlockReader(block.getBlock(),
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block.getLocations()[0], block.getBlockToken());
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if (checksum == null) {
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checksum = blockReader.getDataChecksum();
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} else {
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assert checksum.equals(blockReader.getDataChecksum());
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}
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blockReaders[i] = blockReader;
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}
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assert checksum != null;
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int bytesPerChecksum = checksum.getBytesPerChecksum();
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int bufferSize = stripedReadBufferSize < bytesPerChecksum ? bytesPerChecksum :
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stripedReadBufferSize - stripedReadBufferSize % bytesPerChecksum;
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final ByteBuffer[] buffers = new ByteBuffer[dataBlkNum + parityBlkNum];
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final ByteBuffer[] outputs = new ByteBuffer[parityBlkNum];
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for (int i = 0; i < dataBlkNum + parityBlkNum; i++) {
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buffers[i] = ByteBuffer.allocate(bufferSize);
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}
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for (int i = 0; i < parityBlkNum; i++) {
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outputs[i] = ByteBuffer.allocate(bufferSize);
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}
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long positionInBlock = 0L;
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while (positionInBlock < maxBlockLen) {
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final int toVerifyLen = (int) Math.min(bufferSize, maxBlockLen - positionInBlock);
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List<Future<Integer>> futures = new ArrayList<>(dataBlkNum + parityBlkNum);
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for (int i = 0; i < dataBlkNum + parityBlkNum; i++) {
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final int fi = i;
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futures.add(this.readService.submit(() -> {
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BlockReader blockReader = blockReaders[fi];
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ByteBuffer buffer = buffers[fi];
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buffer.clear();
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buffer.limit(toVerifyLen);
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int readLen = 0;
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if (blockReader != null) {
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int toRead = buffer.remaining();
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while (readLen < toRead) {
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int nread = blockReader.read(buffer);
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if (nread <= 0) {
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break;
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}
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readLen += nread;
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}
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}
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while (buffer.hasRemaining()) {
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buffer.put((byte) 0);
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}
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buffer.flip();
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return readLen;
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}));
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}
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for (int i = 0; i < dataBlkNum + parityBlkNum; i++) {
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futures.get(i).get(1, TimeUnit.MINUTES);
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}
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ByteBuffer[] inputs = new ByteBuffer[dataBlkNum];
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System.arraycopy(buffers, 0, inputs, 0, dataBlkNum);
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for (int i = 0; i < parityBlkNum; i++) {
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outputs[i].clear();
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outputs[i].limit(toVerifyLen);
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}
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this.encoder.encode(inputs, outputs);
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for (int i = 0; i < parityBlkNum; i++) {
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if (!buffers[dataBlkNum + i].equals(outputs[i])) {
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throw new Exception("EC compute result not match.");
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}
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}
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positionInBlock += toVerifyLen;
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}
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}
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private BlockReader createBlockReader(ExtendedBlock block, DatanodeInfo dnInfo,
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Token<BlockTokenIdentifier> token) throws IOException {
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InetSocketAddress dnAddress = NetUtils.createSocketAddr(dnInfo.getXferAddr(useDNHostname));
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Peer peer = client.newConnectedPeer(dnAddress, token, dnInfo);
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return BlockReaderRemote.newBlockReader(
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"dummy", block, token, 0,
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block.getNumBytes(), true, "", peer, dnInfo,
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null, cachingStrategy, -1, getConf());
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}
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private void closeBlockReaders() {
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for (int i = 0; i < blockReaders.length; i++) {
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if (blockReaders[i] != null) {
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IOUtils.closeStream(blockReaders[i]);
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blockReaders[i] = null;
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}
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}
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}
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}
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/**
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* The command for getting help about other commands.
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*/
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@ -708,6 +708,16 @@ Usage: `hdfs debug recoverLease -path <path> [-retries <num-retries>]`
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Recover the lease on the specified path. The path must reside on an HDFS file system. The default number of retries is 1.
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### `verifyEC`
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Usage: `hdfs debug verifyEC -file <file>`
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| COMMAND\_OPTION | Description |
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|:---- |:---- |
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| [`-file` *EC-file*] | HDFS EC file to be verified. |
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Verify the correctness of erasure coding on an erasure coded file.
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dfsadmin with ViewFsOverloadScheme
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----------------------------------
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@ -17,15 +17,22 @@
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*/
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package org.apache.hadoop.hdfs.tools;
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import org.apache.commons.io.FileUtils;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FSDataOutputStream;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.fs.permission.FsPermission;
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import org.apache.hadoop.hdfs.DFSTestUtil;
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import org.apache.hadoop.hdfs.DistributedFileSystem;
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import org.apache.hadoop.hdfs.MiniDFSCluster;
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import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
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import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
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import org.apache.hadoop.hdfs.protocol.LocatedBlock;
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import org.apache.hadoop.hdfs.protocol.LocatedStripedBlock;
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import org.apache.hadoop.hdfs.protocol.SystemErasureCodingPolicies;
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import org.apache.hadoop.hdfs.server.datanode.DataNode;
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import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi;
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import org.apache.hadoop.hdfs.util.StripedBlockUtil;
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import org.apache.hadoop.io.IOUtils;
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import org.junit.After;
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import org.junit.Before;
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@ -34,6 +41,8 @@ import org.junit.Test;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.PrintStream;
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import java.util.List;
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import java.util.Random;
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import static org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetTestUtil.*;
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import static org.junit.Assert.assertEquals;
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@ -44,23 +53,16 @@ public class TestDebugAdmin {
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static private final String TEST_ROOT_DIR =
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new File(System.getProperty("test.build.data", "/tmp"),
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TestDebugAdmin.class.getSimpleName()).getAbsolutePath();
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private Configuration conf = new Configuration();
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private MiniDFSCluster cluster;
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private DistributedFileSystem fs;
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private DebugAdmin admin;
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private DataNode datanode;
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@Before
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public void setUp() throws Exception {
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final File testRoot = new File(TEST_ROOT_DIR);
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testRoot.delete();
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testRoot.mkdirs();
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Configuration conf = new Configuration();
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cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
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cluster.waitActive();
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fs = cluster.getFileSystem();
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admin = new DebugAdmin(conf);
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datanode = cluster.getDataNodes().get(0);
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}
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@After
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@ -92,8 +94,11 @@ public class TestDebugAdmin {
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@Test(timeout = 60000)
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public void testRecoverLease() throws Exception {
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cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
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cluster.waitActive();
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assertEquals("ret: 1, You must supply a -path argument to recoverLease.",
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runCmd(new String[]{"recoverLease", "-retries", "1"}));
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DistributedFileSystem fs = cluster.getFileSystem();
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FSDataOutputStream out = fs.create(new Path("/foo"));
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out.write(123);
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out.close();
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@ -103,6 +108,10 @@ public class TestDebugAdmin {
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@Test(timeout = 60000)
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public void testVerifyMetaCommand() throws Exception {
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cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
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cluster.waitActive();
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DistributedFileSystem fs = cluster.getFileSystem();
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DataNode datanode = cluster.getDataNodes().get(0);
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DFSTestUtil.createFile(fs, new Path("/bar"), 1234, (short) 1, 0xdeadbeef);
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FsDatasetSpi<?> fsd = datanode.getFSDataset();
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ExtendedBlock block = DFSTestUtil.getFirstBlock(fs, new Path("/bar"));
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@ -128,6 +137,10 @@ public class TestDebugAdmin {
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@Test(timeout = 60000)
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public void testComputeMetaCommand() throws Exception {
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cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
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cluster.waitActive();
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DistributedFileSystem fs = cluster.getFileSystem();
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DataNode datanode = cluster.getDataNodes().get(0);
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DFSTestUtil.createFile(fs, new Path("/bar"), 1234, (short) 1, 0xdeadbeef);
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FsDatasetSpi<?> fsd = datanode.getFSDataset();
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ExtendedBlock block = DFSTestUtil.getFirstBlock(fs, new Path("/bar"));
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@ -166,8 +179,97 @@ public class TestDebugAdmin {
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@Test(timeout = 60000)
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public void testRecoverLeaseforFileNotFound() throws Exception {
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cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
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cluster.waitActive();
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assertTrue(runCmd(new String[] {
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"recoverLease", "-path", "/foo", "-retries", "2" }).contains(
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"Giving up on recoverLease for /foo after 1 try"));
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}
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@Test(timeout = 60000)
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public void testVerifyECCommand() throws Exception {
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final ErasureCodingPolicy ecPolicy = SystemErasureCodingPolicies.getByID(
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SystemErasureCodingPolicies.RS_3_2_POLICY_ID);
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cluster = DFSTestUtil.setupCluster(conf, 6, 5, 0);
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cluster.waitActive();
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DistributedFileSystem fs = cluster.getFileSystem();
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assertEquals("ret: 1, verifyEC -file <file> Verify HDFS erasure coding on " +
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"all block groups of the file.", runCmd(new String[]{"verifyEC"}));
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assertEquals("ret: 1, File /bar does not exist.",
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runCmd(new String[]{"verifyEC", "-file", "/bar"}));
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fs.create(new Path("/bar")).close();
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assertEquals("ret: 1, File /bar is not erasure coded.",
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runCmd(new String[]{"verifyEC", "-file", "/bar"}));
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final Path ecDir = new Path("/ec");
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fs.mkdir(ecDir, FsPermission.getDirDefault());
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fs.enableErasureCodingPolicy(ecPolicy.getName());
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fs.setErasureCodingPolicy(ecDir, ecPolicy.getName());
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assertEquals("ret: 1, File /ec is not a regular file.",
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runCmd(new String[]{"verifyEC", "-file", "/ec"}));
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fs.create(new Path(ecDir, "foo"));
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assertEquals("ret: 1, File /ec/foo is not closed.",
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runCmd(new String[]{"verifyEC", "-file", "/ec/foo"}));
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final short repl = 1;
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final long k = 1024;
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final long m = k * k;
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final long seed = 0x1234567L;
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DFSTestUtil.createFile(fs, new Path(ecDir, "foo_65535"), 65535, repl, seed);
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assertTrue(runCmd(new String[]{"verifyEC", "-file", "/ec/foo_65535"})
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.contains("All EC block group status: OK"));
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DFSTestUtil.createFile(fs, new Path(ecDir, "foo_256k"), 256 * k, repl, seed);
|
||||
assertTrue(runCmd(new String[]{"verifyEC", "-file", "/ec/foo_256k"})
|
||||
.contains("All EC block group status: OK"));
|
||||
DFSTestUtil.createFile(fs, new Path(ecDir, "foo_1m"), m, repl, seed);
|
||||
assertTrue(runCmd(new String[]{"verifyEC", "-file", "/ec/foo_1m"})
|
||||
.contains("All EC block group status: OK"));
|
||||
DFSTestUtil.createFile(fs, new Path(ecDir, "foo_2m"), 2 * m, repl, seed);
|
||||
assertTrue(runCmd(new String[]{"verifyEC", "-file", "/ec/foo_2m"})
|
||||
.contains("All EC block group status: OK"));
|
||||
DFSTestUtil.createFile(fs, new Path(ecDir, "foo_3m"), 3 * m, repl, seed);
|
||||
assertTrue(runCmd(new String[]{"verifyEC", "-file", "/ec/foo_3m"})
|
||||
.contains("All EC block group status: OK"));
|
||||
DFSTestUtil.createFile(fs, new Path(ecDir, "foo_5m"), 5 * m, repl, seed);
|
||||
assertTrue(runCmd(new String[]{"verifyEC", "-file", "/ec/foo_5m"})
|
||||
.contains("All EC block group status: OK"));
|
||||
DFSTestUtil.createFile(fs, new Path(ecDir, "foo_6m"), (int) k, 6 * m, m, repl, seed);
|
||||
assertEquals("ret: 0, Checking EC block group: blk_x;Status: OK" +
|
||||
"Checking EC block group: blk_x;Status: OK" +
|
||||
"All EC block group status: OK",
|
||||
runCmd(new String[]{"verifyEC", "-file", "/ec/foo_6m"})
|
||||
.replaceAll("blk_-[0-9]+", "blk_x;"));
|
||||
|
||||
Path corruptFile = new Path(ecDir, "foo_corrupt");
|
||||
DFSTestUtil.createFile(fs, corruptFile, 5841961, repl, seed);
|
||||
List<LocatedBlock> blocks = DFSTestUtil.getAllBlocks(fs, corruptFile);
|
||||
assertEquals(1, blocks.size());
|
||||
LocatedStripedBlock blockGroup = (LocatedStripedBlock) blocks.get(0);
|
||||
LocatedBlock[] indexedBlocks = StripedBlockUtil.parseStripedBlockGroup(blockGroup,
|
||||
ecPolicy.getCellSize(), ecPolicy.getNumDataUnits(), ecPolicy.getNumParityUnits());
|
||||
// Try corrupt block 0 in block group.
|
||||
LocatedBlock toCorruptLocatedBlock = indexedBlocks[0];
|
||||
ExtendedBlock toCorruptBlock = toCorruptLocatedBlock.getBlock();
|
||||
DataNode datanode = cluster.getDataNode(toCorruptLocatedBlock.getLocations()[0].getIpcPort());
|
||||
File blockFile = getBlockFile(datanode.getFSDataset(),
|
||||
toCorruptBlock.getBlockPoolId(), toCorruptBlock.getLocalBlock());
|
||||
File metaFile = getMetaFile(datanode.getFSDataset(),
|
||||
toCorruptBlock.getBlockPoolId(), toCorruptBlock.getLocalBlock());
|
||||
// Write error bytes to block file and re-generate meta checksum.
|
||||
byte[] errorBytes = new byte[2097152];
|
||||
new Random(seed).nextBytes(errorBytes);
|
||||
FileUtils.writeByteArrayToFile(blockFile, errorBytes);
|
||||
metaFile.delete();
|
||||
runCmd(new String[]{"computeMeta", "-block", blockFile.getAbsolutePath(),
|
||||
"-out", metaFile.getAbsolutePath()});
|
||||
assertTrue(runCmd(new String[]{"verifyEC", "-file", "/ec/foo_corrupt"})
|
||||
.contains("Status: ERROR, message: EC compute result not match."));
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue