HDFS-7158. Reduce the memory usage of WebImageViewer. Contributed by Haohui Mai.
This commit is contained in:
Haohui Mai
parent
bd69f86668
commit
0eec4c187c
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@ -273,6 +273,8 @@ Release 2.6.0 - UNRELEASED
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HDFS-7153. Add storagePolicy to NN edit log during file creation.
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(Arpit Agarwal)
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HDFS-7158. Reduce the memory usage of WebImageViewer. (wheat9)
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OPTIMIZATIONS
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HDFS-6690. Deduplicate xattr names in memory. (wang)
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@ -24,6 +24,9 @@ import java.util.Map;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.hadoop.hdfs.web.JsonUtil;
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import org.apache.hadoop.ipc.RemoteException;
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import org.jboss.netty.channel.ChannelFuture;
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import org.jboss.netty.channel.ChannelFutureListener;
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import org.jboss.netty.channel.ChannelHandlerContext;
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import org.jboss.netty.channel.MessageEvent;
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@ -37,99 +40,92 @@ import org.jboss.netty.handler.codec.http.HttpResponseStatus;
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import org.jboss.netty.handler.codec.http.HttpVersion;
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import org.jboss.netty.handler.codec.http.QueryStringDecoder;
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import javax.management.Query;
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/**
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* Implement the read-only WebHDFS API for fsimage.
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*/
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public class FSImageHandler extends SimpleChannelUpstreamHandler {
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class FSImageHandler extends SimpleChannelUpstreamHandler {
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public static final Log LOG = LogFactory.getLog(FSImageHandler.class);
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private final FSImageLoader loader;
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private final FSImageLoader image;
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public FSImageHandler(FSImageLoader loader) throws IOException {
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this.loader = loader;
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FSImageHandler(FSImageLoader image) throws IOException {
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this.image = image;
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}
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@Override
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public void messageReceived(
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ChannelHandlerContext ctx, MessageEvent e) throws Exception {
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String op = getOp(e);
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ChannelFuture future = e.getFuture();
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try {
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String path = getPath(e);
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handleOperation(op, path, e);
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} catch (Exception ex) {
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notFoundResponse(e);
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LOG.warn(ex.getMessage());
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future = handleOperation(e);
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} finally {
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e.getFuture().addListener(ChannelFutureListener.CLOSE);
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future.addListener(ChannelFutureListener.CLOSE);
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}
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}
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/** return the op parameter in upper case */
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private String getOp(MessageEvent e) {
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Map<String, List<String>> parameters = getDecoder(e).getParameters();
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if (parameters.containsKey("op")) {
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return parameters.get("op").get(0).toUpperCase();
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} else {
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// return "" to avoid NPE
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return "";
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}
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}
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private String getPath(MessageEvent e) throws FileNotFoundException {
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String path = getDecoder(e).getPath();
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// trim "/webhdfs/v1" to keep compatibility with WebHDFS API
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if (path.startsWith("/webhdfs/v1/")) {
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return path.replaceFirst("/webhdfs/v1", "");
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} else {
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throw new FileNotFoundException("Path: " + path + " should " +
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"start with \"/webhdfs/v1/\"");
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}
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}
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private QueryStringDecoder getDecoder(MessageEvent e) {
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HttpRequest request = (HttpRequest) e.getMessage();
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return new QueryStringDecoder(request.getUri());
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}
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private void handleOperation(String op, String path, MessageEvent e)
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private ChannelFuture handleOperation(MessageEvent e)
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throws IOException {
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HttpRequest request = (HttpRequest) e.getMessage();
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HttpResponse response = new DefaultHttpResponse(
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HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
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response.setHeader(HttpHeaders.Names.CONTENT_TYPE,
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"application/json");
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String content = null;
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HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
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response.setHeader(HttpHeaders.Names.CONTENT_TYPE, "application/json");
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if (request.getMethod() == HttpMethod.GET){
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if (op.equals("GETFILESTATUS")) {
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content = loader.getFileStatus(path);
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} else if (op.equals("LISTSTATUS")) {
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content = loader.listStatus(path);
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} else if (op.equals("GETACLSTATUS")) {
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content = loader.getAclStatus(path);
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} else {
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response.setStatus(HttpResponseStatus.BAD_REQUEST);
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}
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} else {
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// only HTTP GET is allowed since fsimage is read-only.
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if (request.getMethod() != HttpMethod.GET) {
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response.setStatus(HttpResponseStatus.METHOD_NOT_ALLOWED);
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return e.getChannel().write(response);
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}
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if (content != null) {
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HttpHeaders.setContentLength(response, content.length());
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QueryStringDecoder decoder = new QueryStringDecoder(request.getUri());
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final String op = getOp(decoder);
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String content;
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String path = null;
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try {
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path = getPath(decoder);
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if ("GETFILESTATUS".equals(op)) {
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content = image.getFileStatus(path);
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} else if ("LISTSTATUS".equals(op)) {
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content = image.listStatus(path);
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} else if ("GETACLSTATUS".equals(op)) {
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content = image.getAclStatus(path);
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} else {
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throw new IllegalArgumentException("Invalid value for webhdfs parameter" + " \"op\"");
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}
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} catch (IllegalArgumentException ex) {
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response.setStatus(HttpResponseStatus.BAD_REQUEST);
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content = JsonUtil.toJsonString(ex);
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} catch (FileNotFoundException ex) {
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response.setStatus(HttpResponseStatus.NOT_FOUND);
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content = JsonUtil.toJsonString(ex);
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} catch (Exception ex) {
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content = JsonUtil.toJsonString(ex);
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}
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HttpHeaders.setContentLength(response, content.length());
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e.getChannel().write(response);
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if (content != null) {
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e.getChannel().write(content);
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}
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ChannelFuture future = e.getChannel().write(content);
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LOG.info(response.getStatus().getCode() + " method="
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+ request.getMethod().getName() + " op=" + op + " target=" + path);
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return future;
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}
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private void notFoundResponse(MessageEvent e) {
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HttpResponse response = new DefaultHttpResponse(
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HttpVersion.HTTP_1_1, HttpResponseStatus.NOT_FOUND);
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e.getChannel().write(response);
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private static String getOp(QueryStringDecoder decoder) {
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Map<String, List<String>> parameters = decoder.getParameters();
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return parameters.containsKey("op")
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? parameters.get("op").get(0).toUpperCase() : null;
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}
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private static String getPath(QueryStringDecoder decoder)
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throws FileNotFoundException {
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String path = decoder.getPath();
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if (path.startsWith("/webhdfs/v1/")) {
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return path.substring(11);
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} else {
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throw new FileNotFoundException("Path: " + path + " should " +
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"start with \"/webhdfs/v1/\"");
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}
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}
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}
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@ -18,16 +18,22 @@
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package org.apache.hadoop.hdfs.tools.offlineImageViewer;
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import java.io.BufferedInputStream;
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import java.io.EOFException;
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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.io.InputStream;
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import java.io.RandomAccessFile;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.List;
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import java.util.Map;
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import com.google.common.collect.ImmutableList;
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import com.google.protobuf.CodedInputStream;
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import com.google.protobuf.InvalidProtocolBufferException;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.hadoop.conf.Configuration;
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@ -55,14 +61,38 @@ import com.google.common.io.LimitInputStream;
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class FSImageLoader {
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public static final Log LOG = LogFactory.getLog(FSImageHandler.class);
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private static String[] stringTable;
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private static Map<Long, FsImageProto.INodeSection.INode> inodes =
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Maps.newHashMap();
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private static Map<Long, long[]> dirmap = Maps.newHashMap();
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private static List<FsImageProto.INodeReferenceSection.INodeReference>
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refList = Lists.newArrayList();
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private final String[] stringTable;
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// byte representation of inodes, sorted by id
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private final byte[][] inodes;
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private final Map<Long, long[]> dirmap;
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private static final Comparator<byte[]> INODE_BYTES_COMPARATOR = new
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Comparator<byte[]>() {
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@Override
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public int compare(byte[] o1, byte[] o2) {
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try {
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final FsImageProto.INodeSection.INode l = FsImageProto.INodeSection
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.INode.parseFrom(o1);
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final FsImageProto.INodeSection.INode r = FsImageProto.INodeSection
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.INode.parseFrom(o2);
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if (l.getId() < r.getId()) {
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return -1;
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} else if (l.getId() > r.getId()) {
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return 1;
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} else {
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return 0;
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}
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} catch (InvalidProtocolBufferException e) {
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throw new RuntimeException(e);
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}
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}
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};
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private FSImageLoader() {}
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private FSImageLoader(String[] stringTable, byte[][] inodes,
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Map<Long, long[]> dirmap) {
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this.stringTable = stringTable;
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this.inodes = inodes;
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this.dirmap = dirmap;
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}
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/**
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* Load fsimage into the memory.
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@ -79,7 +109,14 @@ class FSImageLoader {
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FsImageProto.FileSummary summary = FSImageUtil.loadSummary(file);
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FileInputStream fin = null;
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try {
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// Map to record INodeReference to the referred id
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ImmutableList<Long> refIdList = null;
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String[] stringTable = null;
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byte[][] inodes = null;
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Map<Long, long[]> dirmap = null;
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fin = new FileInputStream(file.getFD());
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ArrayList<FsImageProto.FileSummary.Section> sections =
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@ -109,34 +146,37 @@ class FSImageLoader {
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summary.getCodec(), new BufferedInputStream(new LimitInputStream(
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fin, s.getLength())));
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LOG.debug("Loading section " + s.getName() + " length: " + s.getLength
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());
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switch (FSImageFormatProtobuf.SectionName.fromString(s.getName())) {
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case STRING_TABLE:
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loadStringTable(is);
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stringTable = loadStringTable(is);
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break;
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case INODE:
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loadINodeSection(is);
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inodes = loadINodeSection(is);
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break;
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case INODE_REFERENCE:
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loadINodeReferenceSection(is);
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refIdList = loadINodeReferenceSection(is);
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break;
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case INODE_DIR:
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loadINodeDirectorySection(is);
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dirmap = loadINodeDirectorySection(is, refIdList);
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break;
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default:
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break;
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}
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}
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return new FSImageLoader(stringTable, inodes, dirmap);
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} finally {
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IOUtils.cleanup(null, fin);
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}
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return new FSImageLoader();
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}
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private static void loadINodeDirectorySection(InputStream in)
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private static Map<Long, long[]> loadINodeDirectorySection
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(InputStream in, List<Long> refIdList)
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throws IOException {
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if (LOG.isDebugEnabled()) {
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LOG.debug("Loading directory section");
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}
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LOG.info("Loading inode directory section");
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Map<Long, long[]> dirs = Maps.newHashMap();
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long counter = 0;
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while (true) {
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FsImageProto.INodeDirectorySection.DirEntry e =
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FsImageProto.INodeDirectorySection.DirEntry.parseDelimitedFrom(in);
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@ -144,31 +184,27 @@ class FSImageLoader {
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if (e == null) {
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break;
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}
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++counter;
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long[] l = new long[e.getChildrenCount() + e.getRefChildrenCount()];
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for (int i = 0; i < e.getChildrenCount(); ++i) {
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l[i] = e.getChildren(i);
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}
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for (int i = e.getChildrenCount(); i < l.length; i++) {
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int refId = e.getRefChildren(i - e.getChildrenCount());
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l[i] = refList.get(refId).getReferredId();
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}
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dirmap.put(e.getParent(), l);
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if (LOG.isDebugEnabled()) {
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LOG.debug("Loaded directory (parent " + e.getParent()
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+ ") with " + e.getChildrenCount() + " children and "
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+ e.getRefChildrenCount() + " reference children");
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l[i] = refIdList.get(refId);
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}
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dirs.put(e.getParent(), l);
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}
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if (LOG.isDebugEnabled()) {
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LOG.debug("Loaded " + dirmap.size() + " directories");
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}
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LOG.info("Loaded " + counter + " directories");
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return dirs;
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}
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private static void loadINodeReferenceSection(InputStream in)
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private static ImmutableList<Long> loadINodeReferenceSection(InputStream in)
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throws IOException {
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if (LOG.isDebugEnabled()) {
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LOG.debug("Loading inode reference section");
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}
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LOG.info("Loading inode references");
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ImmutableList.Builder<Long> builder = ImmutableList.builder();
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long counter = 0;
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while (true) {
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FsImageProto.INodeReferenceSection.INodeReference e =
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FsImageProto.INodeReferenceSection.INodeReference
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@ -176,49 +212,44 @@ class FSImageLoader {
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if (e == null) {
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break;
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}
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refList.add(e);
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if (LOG.isTraceEnabled()) {
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LOG.trace("Loaded inode reference named '" + e.getName()
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+ "' referring to id " + e.getReferredId() + "");
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}
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}
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if (LOG.isDebugEnabled()) {
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LOG.debug("Loaded " + refList.size() + " inode references");
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++counter;
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builder.add(e.getReferredId());
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}
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LOG.info("Loaded " + counter + " inode references");
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return builder.build();
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}
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private static void loadINodeSection(InputStream in) throws IOException {
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private static byte[][] loadINodeSection(InputStream in)
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throws IOException {
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FsImageProto.INodeSection s = FsImageProto.INodeSection
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.parseDelimitedFrom(in);
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if (LOG.isDebugEnabled()) {
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LOG.debug("Found " + s.getNumInodes() + " inodes in inode section");
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}
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LOG.info("Loading " + s.getNumInodes() + " inodes.");
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final byte[][] inodes = new byte[(int) s.getNumInodes()][];
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for (int i = 0; i < s.getNumInodes(); ++i) {
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FsImageProto.INodeSection.INode p = FsImageProto.INodeSection.INode
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.parseDelimitedFrom(in);
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inodes.put(p.getId(), p);
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if (LOG.isTraceEnabled()) {
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LOG.trace("Loaded inode id " + p.getId() + " type " + p.getType()
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+ " name '" + p.getName().toStringUtf8() + "'");
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}
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int size = CodedInputStream.readRawVarint32(in.read(), in);
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byte[] bytes = new byte[size];
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IOUtils.readFully(in, bytes, 0, size);
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inodes[i] = bytes;
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}
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LOG.debug("Sorting inodes");
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Arrays.sort(inodes, INODE_BYTES_COMPARATOR);
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LOG.debug("Finished sorting inodes");
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return inodes;
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}
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private static void loadStringTable(InputStream in) throws IOException {
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private static String[] loadStringTable(InputStream in) throws
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IOException {
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FsImageProto.StringTableSection s = FsImageProto.StringTableSection
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.parseDelimitedFrom(in);
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if (LOG.isDebugEnabled()) {
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LOG.debug("Found " + s.getNumEntry() + " strings in string section");
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}
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stringTable = new String[s.getNumEntry() + 1];
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LOG.info("Loading " + s.getNumEntry() + " strings");
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String[] stringTable = new String[s.getNumEntry() + 1];
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for (int i = 0; i < s.getNumEntry(); ++i) {
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FsImageProto.StringTableSection.Entry e = FsImageProto
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.StringTableSection.Entry.parseDelimitedFrom(in);
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stringTable[e.getId()] = e.getStr();
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if (LOG.isTraceEnabled()) {
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LOG.trace("Loaded string " + e.getStr());
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}
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}
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return stringTable;
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}
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/**
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@ -229,7 +260,7 @@ class FSImageLoader {
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*/
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String getFileStatus(String path) throws IOException {
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ObjectMapper mapper = new ObjectMapper();
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FsImageProto.INodeSection.INode inode = inodes.get(getINodeId(path));
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FsImageProto.INodeSection.INode inode = fromINodeId(lookup(path));
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return "{\"FileStatus\":\n"
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+ mapper.writeValueAsString(getFileStatus(inode, false)) + "\n}\n";
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}
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@ -256,10 +287,11 @@ class FSImageLoader {
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return sb.toString();
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}
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private List<Map<String, Object>> getFileStatusList(String path) {
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private List<Map<String, Object>> getFileStatusList(String path)
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throws IOException {
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List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
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long id = getINodeId(path);
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FsImageProto.INodeSection.INode inode = inodes.get(id);
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long id = lookup(path);
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FsImageProto.INodeSection.INode inode = fromINodeId(id);
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if (inode.getType() == FsImageProto.INodeSection.INode.Type.DIRECTORY) {
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if (!dirmap.containsKey(id)) {
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// if the directory is empty, return empty list
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@ -267,7 +299,7 @@ class FSImageLoader {
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}
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long[] children = dirmap.get(id);
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for (long cid : children) {
|
||||
list.add(getFileStatus(inodes.get(cid), true));
|
||||
list.add(getFileStatus(fromINodeId(cid), true));
|
||||
}
|
||||
} else {
|
||||
list.add(getFileStatus(inode, false));
|
||||
|
|
@ -305,9 +337,9 @@ class FSImageLoader {
|
|||
return sb.toString();
|
||||
}
|
||||
|
||||
private List<AclEntry> getAclEntryList(String path) {
|
||||
long id = getINodeId(path);
|
||||
FsImageProto.INodeSection.INode inode = inodes.get(id);
|
||||
private List<AclEntry> getAclEntryList(String path) throws IOException {
|
||||
long id = lookup(path);
|
||||
FsImageProto.INodeSection.INode inode = fromINodeId(id);
|
||||
switch (inode.getType()) {
|
||||
case FILE: {
|
||||
FsImageProto.INodeSection.INodeFile f = inode.getFile();
|
||||
|
|
@ -325,9 +357,9 @@ class FSImageLoader {
|
|||
}
|
||||
}
|
||||
|
||||
private PermissionStatus getPermissionStatus(String path) {
|
||||
long id = getINodeId(path);
|
||||
FsImageProto.INodeSection.INode inode = inodes.get(id);
|
||||
private PermissionStatus getPermissionStatus(String path) throws IOException {
|
||||
long id = lookup(path);
|
||||
FsImageProto.INodeSection.INode inode = fromINodeId(id);
|
||||
switch (inode.getType()) {
|
||||
case FILE: {
|
||||
FsImageProto.INodeSection.INodeFile f = inode.getFile();
|
||||
|
|
@ -353,30 +385,41 @@ class FSImageLoader {
|
|||
/**
|
||||
* Return the INodeId of the specified path.
|
||||
*/
|
||||
private long getINodeId(String strPath) {
|
||||
if (strPath.equals("/")) {
|
||||
return INodeId.ROOT_INODE_ID;
|
||||
}
|
||||
|
||||
String[] nameList = strPath.split("/");
|
||||
Preconditions.checkArgument(nameList.length > 1,
|
||||
"Illegal path: " + strPath);
|
||||
private long lookup(String path) throws IOException {
|
||||
Preconditions.checkArgument(path.startsWith("/"));
|
||||
long id = INodeId.ROOT_INODE_ID;
|
||||
for (int i = 1; i < nameList.length; i++) {
|
||||
long[] children = dirmap.get(id);
|
||||
Preconditions.checkNotNull(children, "File: " +
|
||||
strPath + " is not found in the fsimage.");
|
||||
String cName = nameList[i];
|
||||
boolean findChildren = false;
|
||||
for (int offset = 0, next; offset < path.length(); offset = next) {
|
||||
next = path.indexOf('/', offset + 1);
|
||||
if (next == -1) {
|
||||
next = path.length();
|
||||
}
|
||||
if (offset + 1 > next) {
|
||||
break;
|
||||
}
|
||||
|
||||
final String component = path.substring(offset + 1, next);
|
||||
|
||||
if (component.isEmpty()) {
|
||||
continue;
|
||||
}
|
||||
|
||||
final long[] children = dirmap.get(id);
|
||||
if (children == null) {
|
||||
throw new FileNotFoundException(path);
|
||||
}
|
||||
|
||||
boolean found = false;
|
||||
for (long cid : children) {
|
||||
if (cName.equals(inodes.get(cid).getName().toStringUtf8())) {
|
||||
id = cid;
|
||||
findChildren = true;
|
||||
FsImageProto.INodeSection.INode child = fromINodeId(cid);
|
||||
if (component.equals(child.getName().toStringUtf8())) {
|
||||
found = true;
|
||||
id = child.getId();
|
||||
break;
|
||||
}
|
||||
}
|
||||
Preconditions.checkArgument(findChildren, "File: " +
|
||||
strPath + " is not found in the fsimage.");
|
||||
if (!found) {
|
||||
throw new FileNotFoundException(path);
|
||||
}
|
||||
}
|
||||
return id;
|
||||
}
|
||||
|
|
@ -460,4 +503,23 @@ class FSImageLoader {
|
|||
private String toString(FsPermission permission) {
|
||||
return String.format("%o", permission.toShort());
|
||||
}
|
||||
|
||||
private FsImageProto.INodeSection.INode fromINodeId(final long id)
|
||||
throws IOException {
|
||||
int l = 0, r = inodes.length;
|
||||
while (l < r) {
|
||||
int mid = l + (r - l) / 2;
|
||||
FsImageProto.INodeSection.INode n = FsImageProto.INodeSection.INode
|
||||
.parseFrom(inodes[mid]);
|
||||
long nid = n.getId();
|
||||
if (id > nid) {
|
||||
l = mid + 1;
|
||||
} else if (id < nid) {
|
||||
r = mid;
|
||||
} else {
|
||||
return n;
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue