| /** |
| * 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.yarn.server.nodemanager.webapp; |
| |
| import static org.apache.hadoop.yarn.util.StringHelper.join; |
| import static org.apache.hadoop.yarn.webapp.YarnWebParams.CONTAINER_ID; |
| import static org.apache.hadoop.yarn.webapp.view.JQueryUI.ACCORDION; |
| import static org.apache.hadoop.yarn.webapp.view.JQueryUI.ACCORDION_ID; |
| import static org.apache.hadoop.yarn.webapp.view.JQueryUI.initID; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.nio.charset.Charset; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.hadoop.io.IOUtils; |
| import org.apache.hadoop.yarn.api.records.ContainerId; |
| import org.apache.hadoop.yarn.exceptions.YarnException; |
| import org.apache.hadoop.yarn.server.nodemanager.Context; |
| import org.apache.hadoop.yarn.util.ConverterUtils; |
| import org.apache.hadoop.yarn.webapp.NotFoundException; |
| import org.apache.hadoop.yarn.webapp.SubView; |
| import org.apache.hadoop.yarn.webapp.YarnWebParams; |
| import org.apache.hadoop.yarn.webapp.hamlet.Hamlet; |
| import org.apache.hadoop.yarn.webapp.hamlet.Hamlet.PRE; |
| import org.apache.hadoop.yarn.webapp.view.HtmlBlock; |
| |
| import com.google.inject.Inject; |
| |
| public class ContainerLogsPage extends NMView { |
| |
| public static final String REDIRECT_URL = "redirect.url"; |
| |
| @Override protected void preHead(Page.HTML<_> html) { |
| String redirectUrl = $(REDIRECT_URL); |
| if (redirectUrl == null || redirectUrl.isEmpty()) { |
| set(TITLE, join("Logs for ", $(CONTAINER_ID))); |
| } else { |
| if (redirectUrl.equals("false")) { |
| set(TITLE, join("Failed redirect for ", $(CONTAINER_ID))); |
| //Error getting redirect url. Fall through. |
| } |
| } |
| |
| set(ACCORDION_ID, "nav"); |
| set(initID(ACCORDION, "nav"), "{autoHeight:false, active:0}"); |
| } |
| |
| @Override |
| protected Class<? extends SubView> content() { |
| return ContainersLogsBlock.class; |
| } |
| |
| public static class ContainersLogsBlock extends HtmlBlock implements |
| YarnWebParams { |
| private final Context nmContext; |
| |
| @Inject |
| public ContainersLogsBlock(Context context) { |
| this.nmContext = context; |
| } |
| |
| @Override |
| protected void render(Block html) { |
| |
| String redirectUrl = $(REDIRECT_URL); |
| if (redirectUrl !=null && redirectUrl.equals("false")) { |
| html.h1("Failed while trying to construct the redirect url to the log" + |
| " server. Log Server url may not be configured"); |
| //Intentional fallthrough. |
| } |
| |
| ContainerId containerId; |
| try { |
| containerId = ContainerId.fromString($(CONTAINER_ID)); |
| } catch (IllegalArgumentException ex) { |
| html.h1("Invalid container ID: " + $(CONTAINER_ID)); |
| return; |
| } |
| |
| try { |
| if ($(CONTAINER_LOG_TYPE).isEmpty()) { |
| List<File> logFiles = ContainerLogsUtils.getContainerLogDirs(containerId, |
| request().getRemoteUser(), nmContext); |
| printLogFileDirectory(html, logFiles); |
| } else { |
| File logFile = ContainerLogsUtils.getContainerLogFile(containerId, |
| $(CONTAINER_LOG_TYPE), request().getRemoteUser(), nmContext); |
| printLogFile(html, logFile); |
| } |
| } catch (YarnException ex) { |
| html.h1(ex.getMessage()); |
| } catch (NotFoundException ex) { |
| html.h1(ex.getMessage()); |
| } |
| } |
| |
| private void printLogFile(Block html, File logFile) { |
| long start = |
| $("start").isEmpty() ? -4 * 1024 : Long.parseLong($("start")); |
| start = start < 0 ? logFile.length() + start : start; |
| start = start < 0 ? 0 : start; |
| long end = |
| $("end").isEmpty() ? logFile.length() : Long.parseLong($("end")); |
| end = end < 0 ? logFile.length() + end : end; |
| end = end < 0 ? logFile.length() : end; |
| if (start > end) { |
| html.h1("Invalid start and end values. Start: [" + start + "]" |
| + ", end[" + end + "]"); |
| return; |
| } else { |
| FileInputStream logByteStream = null; |
| |
| try { |
| logByteStream = ContainerLogsUtils.openLogFileForRead($(CONTAINER_ID), |
| logFile, nmContext); |
| } catch (IOException ex) { |
| html.h1(ex.getMessage()); |
| return; |
| } |
| |
| try { |
| long toRead = end - start; |
| if (toRead < logFile.length()) { |
| html.p()._("Showing " + toRead + " bytes. Click ") |
| .a(url("containerlogs", $(CONTAINER_ID), $(APP_OWNER), |
| logFile.getName(), "?start=0"), "here"). |
| _(" for full log")._(); |
| } |
| |
| IOUtils.skipFully(logByteStream, start); |
| InputStreamReader reader = |
| new InputStreamReader(logByteStream, Charset.forName("UTF-8")); |
| int bufferSize = 65536; |
| char[] cbuf = new char[bufferSize]; |
| |
| int len = 0; |
| int currentToRead = toRead > bufferSize ? bufferSize : (int) toRead; |
| PRE<Hamlet> pre = html.pre(); |
| |
| while ((len = reader.read(cbuf, 0, currentToRead)) > 0 |
| && toRead > 0) { |
| pre._(new String(cbuf, 0, len)); |
| toRead = toRead - len; |
| currentToRead = toRead > bufferSize ? bufferSize : (int) toRead; |
| } |
| |
| pre._(); |
| reader.close(); |
| |
| } catch (IOException e) { |
| LOG.error( |
| "Exception reading log file " + logFile.getAbsolutePath(), e); |
| html.h1("Exception reading log file. It might be because log " |
| + "file was aggregated : " + logFile.getName()); |
| } finally { |
| if (logByteStream != null) { |
| try { |
| logByteStream.close(); |
| } catch (IOException e) { |
| // Ignore |
| } |
| } |
| } |
| } |
| } |
| |
| private void printLogFileDirectory(Block html, List<File> containerLogsDirs) { |
| // Print out log types in lexical order |
| Collections.sort(containerLogsDirs); |
| boolean foundLogFile = false; |
| for (File containerLogsDir : containerLogsDirs) { |
| File[] logFiles = containerLogsDir.listFiles(); |
| if (logFiles != null) { |
| Arrays.sort(logFiles); |
| for (File logFile : logFiles) { |
| foundLogFile = true; |
| html.p() |
| .a(url("containerlogs", $(CONTAINER_ID), $(APP_OWNER), |
| logFile.getName(), "?start=-4096"), |
| logFile.getName() + " : Total file length is " |
| + logFile.length() + " bytes.")._(); |
| } |
| } |
| } |
| if (!foundLogFile) { |
| html.h1("No logs available for container " + $(CONTAINER_ID)); |
| return; |
| } |
| } |
| } |
| } |