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<a href="../../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduce_Compatibility_Hadoop1_Hadoop2.html">Compatibility with 1.x</a>
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<h5>MapReduce REST APIs</h5>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/YARN.html">Architecture</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerHA.html">ResourceManager HA</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/ResourceModel.html">Resource Model</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeLabel.html">Node Labels</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeAttributes.html">Node Attributes</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/WebApplicationProxy.html">Web Application Proxy</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html">Timeline Server</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html">Timeline Service V.2</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/DockerContainers.html">Running Applications in Docker Containers</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/RuncContainers.html">Running Applications in runC Containers</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeManagerCgroups.html">Using CGroups</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/SecureContainer.html">Secure Containers</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/ReservationSystem.html">Reservation System</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/GracefulDecommission.html">Graceful Decommission</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/OpportunisticContainers.html">Opportunistic Containers</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/Federation.html">YARN Federation</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/SharedCache.html">Shared Cache</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/UsingGpus.html">Using GPU</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/UsingFPGA.html">Using FPGA</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/PlacementConstraints.html">Placement Constraints</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/YarnUI2.html">YARN UI2</a>
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<h5>YARN REST APIs</h5>
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<ul>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/WebServicesIntro.html">Introduction</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html">Resource Manager</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeManagerRest.html">Node Manager</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html#Timeline_Server_REST_API_v1">Timeline Server</a>
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<li class="none">
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html#Timeline_Service_v.2_REST_API">Timeline Service V.2</a>
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</li>
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</ul>
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<h5>YARN Service</h5>
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<ul>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/Overview.html">Overview</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/QuickStart.html">QuickStart</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/Concepts.html">Concepts</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/YarnServiceAPI.html">Yarn Service API</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/ServiceDiscovery.html">Service Discovery</a>
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<a href="../../../../hadoop-yarn/hadoop-yarn-site/yarn-service/SystemServices.html">System Services</a>
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</ul>
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<h5>Hadoop Compatible File Systems</h5>
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<ul>
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<li class="none">
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<a href="../../../../hadoop-aliyun/tools/hadoop-aliyun/index.html">Aliyun OSS</a>
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<a href="../../../../hadoop-aws/tools/hadoop-aws/index.html">Amazon S3</a>
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<a href="../../../../hadoop-azure/index.html">Azure Blob Storage</a>
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<a href="../../../../hadoop-azure-datalake/index.html">Azure Data Lake Storage</a>
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<a href="../../../../hadoop-cos/cloud-storage/index.html">Tencent COS</a>
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<a href="../../../../hadoop-huaweicloud/cloud-storage/index.html">Huaweicloud OBS</a>
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</ul>
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<h1>Apache Hadoop 1.0.1 Release Notes</h1>
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<p>These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.</p><hr />
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<li><a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-3184">MAPREDUCE-3184</a> | <i>Major</i> | <b>Improve handling of fetch failures when a tasktracker is not responding on HTTP</b></li>
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<p>The TaskTracker now has a thread which monitors for a known Jetty bug in which the selector thread starts spinning and map output can no longer be served. If the bug is detected, the TaskTracker will shut itself down. This feature can be disabled by setting mapred.tasktracker.jetty.cpu.check.enabled to false.</p><hr />
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<li><a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-7470">HADOOP-7470</a> | <i>Minor</i> | <b>move up to Jackson 1.8.8</b></li>
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<p><b>WARNING: No release note provided for this change.</b></p><hr />
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<li><a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-8037">HADOOP-8037</a> | <i>Blocker</i> | <b>Binary tarball does not preserve platform info for native builds, and RPMs fail to provide needed symlinks for libhadoop.so</b></li>
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<p>This fix is marked “incompatible” only because it changes the bin-tarball directory structure to be consistent with the source tarball directory structure. The source tarball is unchanged. RPMs and DEBs now use an intermediate bin-tarball with an “${os.arch}” tag (like the packages themselves). The un-tagged bin-tarball is now multi-platform and retains the structure of the source tarball; it is in fact generated by target “tar”, not by target “binary”. Finally, in the 64-bit RPMs and DEBs, the native libs go in the “lib64” directory instead of “lib”.</p><hr />
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<li><a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-8009">HADOOP-8009</a> | <i>Critical</i> | <b>Create hadoop-client and hadoop-minicluster artifacts for downstream projects</b></li>
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<p>Generate integration artifacts “org.apache.hadoop:hadoop-client” and “org.apache.hadoop:hadoop-minicluster” containing all the jars needed to use Hadoop client APIs, and to run Hadoop MiniClusters, respectively. Push these artifacts to the maven repository when mvn-deploy, along with existing artifacts.</p>
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