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R3704/hadoop-2.3.0-src/hadoop-mapreduce-project/bin/mr-jobhistory-daemon.sh
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mr-jobhistory-daemon.sh
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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.
#
# Environment Variables
#
# HADOOP_JHS_LOGGER Hadoop JobSummary logger.
# HADOOP_CONF_DIR Alternate conf dir. Default is ${HADOOP_MAPRED_HOME}/conf.
# HADOOP_MAPRED_PID_DIR The pid files are stored. /tmp by default.
# HADOOP_MAPRED_NICENESS The scheduling priority for daemons. Defaults to 0.
##
usage="Usage: mr-jobhistory-daemon.sh [--config <conf-dir>] (start|stop) <mapred-command> "
# if no args specified, show usage
if [ $# -le 1 ]; then
echo $usage
exit 1
fi
bin=`dirname "${BASH_SOURCE-$0}"`
bin=`cd "$bin"; pwd`
DEFAULT_LIBEXEC_DIR="$bin"/../libexec
HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
if [ -e ${HADOOP_LIBEXEC_DIR}/mapred-config.sh ]; then
. $HADOOP_LIBEXEC_DIR/mapred-config.sh
fi
# get arguments
startStop=$1
shift
command=$1
shift
hadoop_rotate_log ()
{
log=$1;
num=5;
if [ -n "$2" ]; then
num=$2
fi
if [ -f "$log" ]; then # rotate logs
while [ $num -gt 1 ]; do
prev=`expr $num - 1`
[ -f "$log.$prev" ] && mv "$log.$prev" "$log.$num"
num=$prev
done
mv "$log" "$log.$num";
fi
}
if [ "$HADOOP_MAPRED_IDENT_STRING" = "" ]; then
export HADOOP_MAPRED_IDENT_STRING="$USER"
fi
export HADOOP_MAPRED_HOME=${HADOOP_MAPRED_HOME:-${HADOOP_PREFIX}}
export HADOOP_MAPRED_LOGFILE=mapred-$HADOOP_MAPRED_IDENT_STRING-$command-$HOSTNAME.log
export HADOOP_MAPRED_ROOT_LOGGER=${HADOOP_MAPRED_ROOT_LOGGER:-INFO,RFA}
export HADOOP_JHS_LOGGER=${HADOOP_JHS_LOGGER:-INFO,JSA}
if [ -f "${HADOOP_CONF_DIR}/mapred-env.sh" ]; then
. "${HADOOP_CONF_DIR}/mapred-env.sh"
fi
mkdir -p "$HADOOP_MAPRED_LOG_DIR"
chown $HADOOP_MAPRED_IDENT_STRING $HADOOP_MAPRED_LOG_DIR
if [ "$HADOOP_MAPRED_PID_DIR" = "" ]; then
HADOOP_MAPRED_PID_DIR=/tmp
fi
HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.id.str=$HADOOP_MAPRED_IDENT_STRING"
log=$HADOOP_MAPRED_LOG_DIR/mapred-$HADOOP_MAPRED_IDENT_STRING-$command-$HOSTNAME.out
pid=$HADOOP_MAPRED_PID_DIR/mapred-$HADOOP_MAPRED_IDENT_STRING-$command.pid
HADOOP_MAPRED_STOP_TIMEOUT=${HADOOP_MAPRED_STOP_TIMEOUT:-5}
# Set default scheduling priority
if [ "$HADOOP_MAPRED_NICENESS" = "" ]; then
export HADOOP_MAPRED_NICENESS=0
fi
case $startStop in
(start)
mkdir -p "$HADOOP_MAPRED_PID_DIR"
if [ -f $pid ]; then
if kill -0 `cat $pid` > /dev/null 2>&1; then
echo $command running as process `cat $pid`. Stop it first.
exit 1
fi
fi
hadoop_rotate_log $log
echo starting $command, logging to $log
cd "$HADOOP_MAPRED_HOME"
nohup nice -n $HADOOP_MAPRED_NICENESS "$HADOOP_MAPRED_HOME"/bin/mapred --config $HADOOP_CONF_DIR $command "$@" > "$log" 2>&1 < /dev/null &
echo $! > $pid
sleep 1; head "$log"
;;
(stop)
if [ -f $pid ]; then
TARGET_PID=`cat $pid`
if kill -0 $TARGET_PID > /dev/null 2>&1; then
echo stopping $command
kill $TARGET_PID
sleep $HADOOP_MAPRED_STOP_TIMEOUT
if kill -0 $TARGET_PID > /dev/null 2>&1; then
echo "$command did not stop gracefully after $HADOOP_MAPRED_STOP_TIMEOUT seconds: killing with kill -9"
kill -9 $TARGET_PID
fi
else
echo no $command to stop
fi
else
echo no $command to stop
fi
;;
(*)
echo $usage
exit 1
;;
esac
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