hadoop/hadoop-mapreduce-project/bin/mapred

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#!/usr/bin/env bash
# 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.
bin=`which $0`
bin=`dirname ${bin}`
bin=`cd "$bin"; pwd`
if [ -e $bin/../libexec/mapred-config.sh ]; then
. $bin/../libexec/mapred-config.sh
else
. "$bin/mapred-config.sh"
fi
function print_usage(){
echo "Usage: mapred [--config confdir] COMMAND"
echo " where COMMAND is one of:"
echo " mradmin run a Map-Reduce admin client"
echo " jobtracker run the MapReduce job Tracker node"
echo " tasktracker run a MapReduce task Tracker node"
echo " pipes run a Pipes job"
echo " job manipulate MapReduce jobs"
echo " queue get information regarding JobQueues"
echo " classpath prints the class path needed for running"
echo " mapreduce subcommands"
echo " groups get the groups which users belong to"
echo ""
echo "Most commands print help when invoked w/o parameters."
}
if [ $# = 0 ]; then
print_usage
exit
fi
COMMAND=$1
shift
if [ "$COMMAND" = "mradmin" ] ; then
CLASS=org.apache.hadoop.mapred.tools.MRAdmin
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
elif [ "$COMMAND" = "jobtracker" ] ; then
CLASS=org.apache.hadoop.mapred.JobTracker
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_JOBTRACKER_OPTS"
elif [ "$COMMAND" = "tasktracker" ] ; then
CLASS=org.apache.hadoop.mapred.TaskTracker
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_TASKTRACKER_OPTS"
elif [ "$COMMAND" = "job" ] ; then
CLASS=org.apache.hadoop.mapred.JobClient
elif [ "$COMMAND" = "queue" ] ; then
CLASS=org.apache.hadoop.mapred.JobQueueClient
elif [ "$COMMAND" = "pipes" ] ; then
CLASS=org.apache.hadoop.mapred.pipes.Submitter
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
elif [ "$COMMAND" = "sampler" ] ; then
CLASS=org.apache.hadoop.mapred.lib.InputSampler
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
elif [ "$COMMAND" = "classpath" ] ; then
echo -n
elif [ "$COMMAND" = "groups" ] ; then
CLASS=org.apache.hadoop.mapred.tools.GetGroups
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
else
echo $COMMAND - invalid command
print_usage
exit
fi
# for developers, add mapred classes to CLASSPATH
if [ -d "$HADOOP_MAPRED_HOME/build/classes" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_MAPRED_HOME/build/classes
fi
if [ -d "$HADOOP_MAPRED_HOME/build/webapps" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_MAPRED_HOME/build
fi
if [ -d "$HADOOP_MAPRED_HOME/build/test/classes" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_MAPRED_HOME/build/test/classes
fi
if [ -d "$HADOOP_MAPRED_HOME/build/tools" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_MAPRED_HOME/build/tools
fi
# for releases, add core mapred jar & webapps to CLASSPATH
if [ -d "$HADOOP_PREFIX/share/hadoop/mapreduce/webapps" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_PREFIX/share/hadoop/mapreduce
fi
for f in $HADOOP_MAPRED_HOME/share/hadoop-mapreduce/*.jar; do
CLASSPATH=${CLASSPATH}:$f;
done
# add libs to CLASSPATH
for f in $HADOOP_MAPRED_HOME/lib/*.jar; do
CLASSPATH=${CLASSPATH}:$f;
done
if $cygwin; then
CLASSPATH=`cygpath -p -w "$CLASSPATH"`
fi
if [ "$COMMAND" = "classpath" ] ; then
echo $CLASSPATH
exit
fi
export CLASSPATH
exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS $CLASS "$@"