| # 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. |
| |
| ## |
| ## THIS FILE ACTS AS AN OVERRIDE FOR hadoop-env.sh FOR ALL |
| ## WORK DONE BY THE mapred AND RELATED COMMANDS. |
| ## |
| ## Precedence rules: |
| ## |
| ## mapred-env.sh > hadoop-env.sh > hard-coded defaults |
| ## |
| ## MAPRED_xyz > HADOOP_xyz > hard-coded defaults |
| ## |
| |
| ### |
| # Generic settings for MapReduce |
| ### |
| |
| #Override the log4j settings for all MR apps |
| # export MAPRED_ROOT_LOGGER="INFO,console" |
| |
| # Override Hadoop's log directory & file |
| # export HADOOP_MAPRED_LOG_DIR="" |
| |
| # Override Hadoop's pid directory |
| # export HADOOP_MAPRED_PID_DIR= |
| |
| # Override Hadoop's identity string. $USER by default. |
| # This is used in writing log and pid files, so keep that in mind! |
| # export HADOOP_MAPRED_IDENT_STRING=$USER |
| |
| # Override Hadoop's process priority |
| # Note that sub-processes will also run at this level! |
| # export HADOOP_MAPRED_NICENESS=0 |
| |
| ### |
| # Job History Server specific parameters |
| ### |
| |
| # Specify the max heapsize for the Job History Server using a numerical value |
| # in the scale of MB. For example, to specify an jvm option of -Xmx1000m, set |
| # the value to 1000. |
| # This value will be overridden by an Xmx setting specified in either |
| # MAPRED_OPTS, HADOOP_OPTS, and/or HADOOP_JOB_HISTORYSERVER_OPTS. |
| # If not specified, the default value will be picked from either YARN_HEAPMAX |
| # or JAVA_HEAP_MAX with YARN_HEAPMAX as the preferred option of the two. |
| # |
| #export HADOOP_JOB_HISTORYSERVER_HEAPSIZE=1000 |
| |
| # Specify the JVM options to be used when starting the ResourceManager. |
| # These options will be appended to the options specified as YARN_OPTS |
| # and therefore may override any similar flags set in YARN_OPTS |
| #export HADOOP_JOB_HISTORYSERVER_OPTS= |
| |
| # Specify the log4j settings for the JobHistoryServer |
| #export HADOOP_JHS_LOGGER=INFO,RFA |
| |
| |
| |