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+# 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
+bin=`which "$0"`
+bin=`dirname "${bin}"`
+bin=`cd "$bin"; pwd`
+
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+if [ -e "${HADOOP_LIBEXEC_DIR}/hadoop-config.sh" ]; then
+ . ${HADOOP_LIBEXEC_DIR}/hadoop-config.sh
+elif [ -e "${HADOOP_COMMON_HOME}/libexec/hadoop-config.sh" ]; then
+ . "$HADOOP_COMMON_HOME"/libexec/hadoop-config.sh
+elif [ -e "${HADOOP_HOME}/libexec/hadoop-config.sh" ]; then
+ . "$HADOOP_HOME"/libexec/hadoop-config.sh
+else
+ echo "Hadoop common not found."
+ exit
+fi
+
+# Same glibc bug that discovered in Hadoop.
+# Without this you can see very large vmem settings on containers.
+export MALLOC_ARENA_MAX=${MALLOC_ARENA_MAX:-4}
+
+#check to see if the conf dir is given as an optional argument
+if [ $# -gt 1 ]
+then
+ if [ "--config" = "$1" ]
+ then
+ shift
+ confdir=$1
+ shift
+ YARN_CONF_DIR=$confdir
+ fi
+fi
+
+# Allow alternate conf dir location.
+export YARN_CONF_DIR="${HADOOP_CONF_DIR:-$HADOOP_YARN_HOME/conf}"
+
+#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=$1
+ shift
+ export YARN_SLAVES="${YARN_CONF_DIR}/$slavesfile"
+ fi
+fi