ContextQMD
Back to Hadoop

Licensed to the Apache Software Foundation (ASF) under one

hadoop-common-project/hadoop-common/src/site/markdown/release/2.10.1/RELEASENOTES.2.10.1.md

2.0.5-alpha-rc22.8 KB
Original Source
<!--- # 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. -->

"Apache Hadoop" 2.10.1 Release Notes

These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.

  • MAPREDUCE-7069 | Major | Add ability to specify user environment variables individually

Environment variables for MapReduce tasks can now be specified as separate properties, e.g.: mapreduce.map.env.VARNAME=value mapreduce.reduce.env.VARNAME=value yarn.app.mapreduce.am.env.VARNAME=value yarn.app.mapreduce.am.admin.user.env.VARNAME=value This form of specifying environment variables is useful when the value of an environment variable contains commas.

  • HDFS-15281 | Major | ZKFC ignores dfs.namenode.rpc-bind-host and uses dfs.namenode.rpc-address to bind to host address

ZKFC binds host address to "dfs.namenode.servicerpc-bind-host", if configured. Otherwise, it binds to "dfs.namenode.rpc-bind-host". If neither of those is configured, ZKFC binds itself to NameNode RPC server address (effectively "dfs.namenode.rpc-address").

  • HDFS-12453 | Critical | TestDataNodeHotSwapVolumes fails in trunk Jenkins runs

Submitted version of patch for branch-2.10

  • HADOOP-17089 | Critical | WASB: Update azure-storage-java SDK

Azure WASB bug fix that can cause list results to appear empty.

  • YARN-7677 | Major | Docker image cannot set HADOOP_CONF_DIR

The HADOOP_CONF_DIR environment variable is no longer unconditionally inherited by containers even if it does not appear in the nodemanager whitelist variables specified by the yarn.nodemanager.env-whitelist property. If the whitelist property has been modified from the default to not include HADOOP_CONF_DIR yet containers need it to be inherited from the nodemanager's environment then the whitelist settings need to be updated to include HADOOP_CONF_DIR.