| # 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. |
| |
| # included in all the hadoop scripts with source command |
| # should not be executable directly |
| # also should not be passed any arguments, since we need original $* |
| |
| # resolve links - $0 may be a softlink |
| |
| this="${BASH_SOURCE-$0}" |
| common_bin=$(cd -P -- "$(dirname -- "$this")" && pwd -P) |
| script="$(basename -- "$this")" |
| this="$common_bin/$script" |
| |
| # convert relative path to absolute path |
| config_bin=`dirname "$this"` |
| script=`basename "$this"` |
| config_bin=`cd "$config_bin"; pwd` |
| this="$config_bin/$script" |
| |
| # the root of the Hadoop installation |
| export HADOOP_PREFIX=`dirname "$this"`/.. |
| |
| #check to see if the conf dir is given as an optional argument |
| if [ $# -gt 1 ] |
| then |
| if [ "--config" = "$1" ] |
| then |
| shift |
| confdir=$1 |
| shift |
| HADOOP_CONF_DIR=$confdir |
| fi |
| fi |
| |
| # Allow alternate conf dir location. |
| if [ -e "${HADOOP_PREFIX}/conf/hadoop-env.sh" ]; then |
| DEFAULT_CONF_DIR="conf" |
| else |
| DEFAULT_CONF_DIR="etc/hadoop" |
| fi |
| HADOOP_CONF_DIR="${HADOOP_CONF_DIR:-$HADOOP_PREFIX/$DEFAULT_CONF_DIR}" |
| |
| #check to see it is specified whether to use the slaves or the |
| # masters file |
| if [ $# -gt 1 ] |
| then |
| if [ "--hosts" = "$1" ] |
| then |
| shift |
| slavesfile=$1 |
| shift |
| export HADOOP_SLAVES="${HADOOP_CONF_DIR}/$slavesfile" |
| fi |
| fi |
| |
| if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then |
| . "${HADOOP_CONF_DIR}/hadoop-env.sh" |
| fi |
| |
| if [ "$HADOOP_HOME_WARN_SUPPRESS" = "" ] && [ "$HADOOP_HOME" != "" ]; then |
| echo "Warning: \$HADOOP_HOME is deprecated." 1>&2 |
| echo 1>&2 |
| fi |
| |
| # Newer versions of glibc use an arena memory allocator that causes virtual |
| # memory usage to explode. This interacts badly with the many threads that |
| # we use in Hadoop. Tune the variable down to prevent vmem explosion. |
| export MALLOC_ARENA_MAX=${MALLOC_ARENA_MAX:-4} |
| |
| export HADOOP_HOME=${HADOOP_PREFIX} |
| export HADOOP_HOME_WARN_SUPPRESS=1 |
| |