| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| <!-- |
| | Generated by Apache Maven Doxia at 2021-06-15 |
| | Rendered using Apache Maven Stylus Skin 1.5 |
| --> |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <title>Apache Hadoop 3.3.1 – Apache Hadoop 2.5.0 Release Notes</title> |
| <style type="text/css" media="all"> |
| @import url("../../css/maven-base.css"); |
| @import url("../../css/maven-theme.css"); |
| @import url("../../css/site.css"); |
| </style> |
| <link rel="stylesheet" href="../../css/print.css" type="text/css" media="print" /> |
| <meta name="Date-Revision-yyyymmdd" content="20210615" /> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> |
| </head> |
| <body class="composite"> |
| <div id="banner"> |
| <a href="http://hadoop.apache.org/" id="bannerLeft"> |
| <img src="http://hadoop.apache.org/images/hadoop-logo.jpg" alt="" /> |
| </a> |
| <a href="http://www.apache.org/" id="bannerRight"> |
| <img src="http://www.apache.org/images/asf_logo_wide.png" alt="" /> |
| </a> |
| <div class="clear"> |
| <hr/> |
| </div> |
| </div> |
| <div id="breadcrumbs"> |
| |
| <div class="xleft"> |
| <a href="http://www.apache.org/" class="externalLink">Apache</a> |
| > |
| <a href="http://hadoop.apache.org/" class="externalLink">Hadoop</a> |
| > |
| <a href="../../../index.html">Apache Hadoop Project Dist POM</a> |
| > |
| <a href="../../index.html">Apache Hadoop 3.3.1</a> |
| > |
| Apache Hadoop 2.5.0 Release Notes |
| </div> |
| <div class="xright"> <a href="http://wiki.apache.org/hadoop" class="externalLink">Wiki</a> |
| | |
| <a href="https://gitbox.apache.org/repos/asf/hadoop.git" class="externalLink">git</a> |
| | |
| <a href="http://hadoop.apache.org/" class="externalLink">Apache Hadoop</a> |
| |
| | Last Published: 2021-06-15 |
| | Version: 3.3.1 |
| </div> |
| <div class="clear"> |
| <hr/> |
| </div> |
| </div> |
| <div id="leftColumn"> |
| <div id="navcolumn"> |
| |
| <h5>General</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../index.html">Overview</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/SingleCluster.html">Single Node Setup</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/ClusterSetup.html">Cluster Setup</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/CommandsManual.html">Commands Reference</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/FileSystemShell.html">FileSystem Shell</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/Compatibility.html">Compatibility Specification</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/DownstreamDev.html">Downstream Developer's Guide</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/AdminCompatibilityGuide.html">Admin Compatibility Guide</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/InterfaceClassification.html">Interface Classification</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/filesystem/index.html">FileSystem Specification</a> |
| </li> |
| </ul> |
| <h5>Common</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/CLIMiniCluster.html">CLI Mini Cluster</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/FairCallQueue.html">Fair Call Queue</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/NativeLibraries.html">Native Libraries</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/Superusers.html">Proxy User</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/RackAwareness.html">Rack Awareness</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/SecureMode.html">Secure Mode</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/ServiceLevelAuth.html">Service Level Authorization</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/HttpAuthentication.html">HTTP Authentication</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/CredentialProviderAPI.html">Credential Provider API</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-kms/index.html">Hadoop KMS</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/Tracing.html">Tracing</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/UnixShellGuide.html">Unix Shell Guide</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/registry/index.html">Registry</a> |
| </li> |
| </ul> |
| <h5>HDFS</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsDesign.html">Architecture</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsUserGuide.html">User Guide</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HDFSCommands.html">Commands Reference</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.html">NameNode HA With QJM</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithNFS.html">NameNode HA With NFS</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/ObserverNameNode.html">Observer NameNode</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/Federation.html">Federation</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/ViewFs.html">ViewFs</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/ViewFsOverloadScheme.html">ViewFsOverloadScheme</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsSnapshots.html">Snapshots</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsEditsViewer.html">Edits Viewer</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsImageViewer.html">Image Viewer</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsPermissionsGuide.html">Permissions and HDFS</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsQuotaAdminGuide.html">Quotas and HDFS</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/LibHdfs.html">libhdfs (C API)</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/WebHDFS.html">WebHDFS (REST API)</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-hdfs-httpfs/index.html">HttpFS</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/ShortCircuitLocalReads.html">Short Circuit Local Reads</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/CentralizedCacheManagement.html">Centralized Cache Management</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsNfsGateway.html">NFS Gateway</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsRollingUpgrade.html">Rolling Upgrade</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/ExtendedAttributes.html">Extended Attributes</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/TransparentEncryption.html">Transparent Encryption</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsMultihoming.html">Multihoming</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/ArchivalStorage.html">Storage Policies</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/MemoryStorage.html">Memory Storage Support</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/SLGUserGuide.html">Synthetic Load Generator</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HDFSErasureCoding.html">Erasure Coding</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HDFSDiskbalancer.html">Disk Balancer</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsUpgradeDomain.html">Upgrade Domain</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsDataNodeAdminGuide.html">DataNode Admin</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs-rbf/HDFSRouterFederation.html">Router Federation</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/HdfsProvidedStorage.html">Provided Storage</a> |
| </li> |
| </ul> |
| <h5>MapReduce</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduceTutorial.html">Tutorial</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapredCommands.html">Commands Reference</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduce_Compatibility_Hadoop1_Hadoop2.html">Compatibility with 1.x</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/EncryptedShuffle.html">Encrypted Shuffle</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/PluggableShuffleAndPluggableSort.html">Pluggable Shuffle/Sort</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/DistributedCacheDeploy.html">Distributed Cache Deploy</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/SharedCacheSupport.html">Support for YARN Shared Cache</a> |
| </li> |
| </ul> |
| <h5>MapReduce REST APIs</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapredAppMasterRest.html">MR Application Master</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-hs/HistoryServerRest.html">MR History Server</a> |
| </li> |
| </ul> |
| <h5>YARN</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/YARN.html">Architecture</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/YarnCommands.html">Commands Reference</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/CapacityScheduler.html">Capacity Scheduler</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/FairScheduler.html">Fair Scheduler</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRestart.html">ResourceManager Restart</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerHA.html">ResourceManager HA</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/ResourceModel.html">Resource Model</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeLabel.html">Node Labels</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeAttributes.html">Node Attributes</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/WebApplicationProxy.html">Web Application Proxy</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html">Timeline Server</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html">Timeline Service V.2</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html">Writing YARN Applications</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/YarnApplicationSecurity.html">YARN Application Security</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeManager.html">NodeManager</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/DockerContainers.html">Running Applications in Docker Containers</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/RuncContainers.html">Running Applications in runC Containers</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeManagerCgroups.html">Using CGroups</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/SecureContainer.html">Secure Containers</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/ReservationSystem.html">Reservation System</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/GracefulDecommission.html">Graceful Decommission</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/OpportunisticContainers.html">Opportunistic Containers</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/Federation.html">YARN Federation</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/SharedCache.html">Shared Cache</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/UsingGpus.html">Using GPU</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/UsingFPGA.html">Using FPGA</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/PlacementConstraints.html">Placement Constraints</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/YarnUI2.html">YARN UI2</a> |
| </li> |
| </ul> |
| <h5>YARN REST APIs</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/WebServicesIntro.html">Introduction</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html">Resource Manager</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeManagerRest.html">Node Manager</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html#Timeline_Server_REST_API_v1">Timeline Server</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html#Timeline_Service_v.2_REST_API">Timeline Service V.2</a> |
| </li> |
| </ul> |
| <h5>YARN Service</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/Overview.html">Overview</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/QuickStart.html">QuickStart</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/Concepts.html">Concepts</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/YarnServiceAPI.html">Yarn Service API</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/ServiceDiscovery.html">Service Discovery</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/SystemServices.html">System Services</a> |
| </li> |
| </ul> |
| <h5>Hadoop Compatible File Systems</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-aliyun/tools/hadoop-aliyun/index.html">Aliyun OSS</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-aws/tools/hadoop-aws/index.html">Amazon S3</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-azure/index.html">Azure Blob Storage</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-azure-datalake/index.html">Azure Data Lake Storage</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-openstack/index.html">OpenStack Swift</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-cos/cloud-storage/index.html">Tencent COS</a> |
| </li> |
| </ul> |
| <h5>Auth</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-auth/index.html">Overview</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-auth/Examples.html">Examples</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-auth/Configuration.html">Configuration</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-auth/BuildingIt.html">Building</a> |
| </li> |
| </ul> |
| <h5>Tools</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-streaming/HadoopStreaming.html">Hadoop Streaming</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-archives/HadoopArchives.html">Hadoop Archives</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-archive-logs/HadoopArchiveLogs.html">Hadoop Archive Logs</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-distcp/DistCp.html">DistCp</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-gridmix/GridMix.html">GridMix</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-rumen/Rumen.html">Rumen</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-resourceestimator/ResourceEstimator.html">Resource Estimator Service</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-sls/SchedulerLoadSimulator.html">Scheduler Load Simulator</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/Benchmarking.html">Hadoop Benchmarking</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-dynamometer/Dynamometer.html">Dynamometer</a> |
| </li> |
| </ul> |
| <h5>Reference</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/release/">Changelog and Release Notes</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../api/index.html">Java API docs</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/UnixShellAPI.html">Unix Shell API</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/Metrics.html">Metrics</a> |
| </li> |
| </ul> |
| <h5>Configuration</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/core-default.xml">core-default.xml</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs/hdfs-default.xml">hdfs-default.xml</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-hdfs-rbf/hdfs-rbf-default.xml">hdfs-rbf-default.xml</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/mapred-default.xml">mapred-default.xml</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-yarn/hadoop-yarn-common/yarn-default.xml">yarn-default.xml</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-kms/kms-default.html">kms-default.xml</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-hdfs-httpfs/httpfs-default.html">httpfs-default.xml</a> |
| </li> |
| <li class="none"> |
| <a href="../../../../hadoop-project-dist/hadoop-common/DeprecatedProperties.html">Deprecated Properties</a> |
| </li> |
| </ul> |
| <a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy"> |
| <img alt="Built by Maven" src="../../images/logos/maven-feather.png"/> |
| </a> |
| |
| </div> |
| </div> |
| <div id="bodyColumn"> |
| <div id="contentBox"> |
| <!--- |
| # 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. |
| --> |
| <h1>Apache Hadoop 2.5.0 Release Notes</h1> |
| <p>These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.</p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-10342">HADOOP-10342</a> | <i>Major</i> | <b>Extend UserGroupInformation to return a UGI given a preauthenticated kerberos Subject</b></li> |
| </ul> |
| <p>Add getUGIFromSubject to leverage an external kerberos authentication</p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-6164">HDFS-6164</a> | <i>Major</i> | <b>Remove lsr in OfflineImageViewer</b></li> |
| </ul> |
| <p>The offlineimageviewer no longer generates lsr-style outputs. The functionality has been superseded by a tool that takes the fsimage and exposes WebHDFS-like API for user queries.</p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-6168">HDFS-6168</a> | <i>Major</i> | <b>Remove deprecated methods in DistributedFileSystem</b></li> |
| </ul> |
| <p><b>WARNING: No release note provided for this change.</b></p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-10451">HADOOP-10451</a> | <i>Trivial</i> | <b>Remove unused field and imports from SaslRpcServer</b></li> |
| </ul> |
| <p>SaslRpcServer.SASL_PROPS is removed. Any use of this variable should be replaced with the following code: SaslPropertiesResolver saslPropsResolver = SaslPropertiesResolver.getInstance(conf); Map<String, String> sasl_props = saslPropsResolver.getDefaultProperties();</p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-6153">HDFS-6153</a> | <i>Minor</i> | <b>Document “fileId” and “childrenNum” fields in the FileStatus Json schema</b></li> |
| </ul> |
| <p><b>WARNING: No release note provided for this change.</b></p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-9919">HADOOP-9919</a> | <i>Major</i> | <b>Update hadoop-metrics2.properties examples to Yarn</b></li> |
| </ul> |
| <p>Remove MRv1 settings from hadoop-metrics2.properties, add YARN settings instead.</p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-6273">HDFS-6273</a> | <i>Major</i> | <b>Config options to allow wildcard endpoints for namenode HTTP and HTTPS servers</b></li> |
| </ul> |
| <p>HDFS-6273 introduces two new HDFS configuration keys: - dfs.namenode.http-bind-host - dfs.namenode.https-bind-host</p> |
| <p>The most common use case for these keys is to have the NameNode HTTP (or HTTPS) endpoints listen on all interfaces on multi-homed systems by setting the keys to 0.0.0.0 i.e. INADDR_ANY.</p> |
| <p>For the systems background on this usage of INADDR_ANY please refer to ip(7) in the Linux Programmer’s Manual (web link: <a class="externalLink" href="http://man7.org/linux/man-pages/man7/ip.7.html">http://man7.org/linux/man-pages/man7/ip.7.html</a>).</p> |
| <p>These keys complement the existing NameNode options: - dfs.namenode.rpc-bind-host - dfs.namenode.servicerpc-bind-host</p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-10568">HADOOP-10568</a> | <i>Major</i> | <b>Add s3 server-side encryption</b></li> |
| </ul> |
| <p>s3 server-side encryption is now supported.</p> |
| <p>To enable this feature, specify the following in your client-side configuration:</p> |
| <p>name: fs.s3n.server-side-encryption-algorithm value: AES256</p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-6293">HDFS-6293</a> | <i>Blocker</i> | <b>Issues with OIV processing PB-based fsimages</b></li> |
| </ul> |
| <p>Set “dfs.namenode.legacy-oiv-image.dir” to an appropriate directory to make standby name node or secondary name node save its file system state in the old fsimage format during checkpointing. This image can be used for offline analysis using the OfflineImageViewer. Use the “hdfs oiv_legacy” command to process the old fsimage format.</p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-6110">HDFS-6110</a> | <i>Major</i> | <b>adding more slow action log in critical write path</b></li> |
| </ul> |
| <p>Log slow i/o. Set log thresholds in dfsclient and datanode via the below new configs:</p> |
| <p>dfs.client.slow.io.warning.threshold.ms (Default 30 seconds) dfs.datanode.slow.io.warning.threshold.ms (Default 300ms)</p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2107">YARN-2107</a> | <i>Major</i> | <b>Refactor timeline classes into server.timeline package</b></li> |
| </ul> |
| <p><b>WARNING: No release note provided for this change.</b></p><hr /> |
| <ul> |
| |
| <li><a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-5777">MAPREDUCE-5777</a> | <i>Major</i> | <b>Support utf-8 text with BOM (byte order marker)</b></li> |
| </ul> |
| <p><b>WARNING: No release note provided for this change.</b></p> |
| </div> |
| </div> |
| <div class="clear"> |
| <hr/> |
| </div> |
| <div id="footer"> |
| <div class="xright"> |
| © 2008-2021 |
| Apache Software Foundation |
| |
| - <a href="http://maven.apache.org/privacy-policy.html">Privacy Policy</a>. |
| Apache Maven, Maven, Apache, the Apache feather logo, and the Apache Maven project logos are trademarks of The Apache Software Foundation. |
| </div> |
| <div class="clear"> |
| <hr/> |
| </div> |
| </div> |
| </body> |
| </html> |
