hadoop/hadoop-yarn-project/hadoop-yarn/bin/yarn

#!/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.

MYNAME="${BASH_SOURCE-$0}"

function hadoop_usage
{
  hadoop_add_option "--buildpaths" "attempt to add class files from build tree"
  hadoop_add_option "--daemon (start|status|stop)" "operate on a daemon"
  hadoop_add_option "--hostnames list[,of,host,names]" "hosts to use in slave mode"
  hadoop_add_option "--loglevel level" "set the log4j level for this command"
  hadoop_add_option "--hosts filename" "list of hosts to use in slave mode"
  hadoop_add_option "--slaves" "turn on slave mode"

  hadoop_add_subcommand "application" "prints application(s) report/kill application"
  hadoop_add_subcommand "applicationattempt" "prints applicationattempt(s) report"
  hadoop_add_subcommand "classpath" "prints the class path needed to get the hadoop jar and the required libraries"
  hadoop_add_subcommand "cluster" "prints cluster information"
  hadoop_add_subcommand "container" "prints container(s) report"
  hadoop_add_subcommand "daemonlog" "get/set the log level for each daemon"
  hadoop_add_subcommand "envvars" "display computed Hadoop environment variables"
  hadoop_add_subcommand "jar <jar>" "run a jar file"
  hadoop_add_subcommand "logs" "dump container logs"
  hadoop_add_subcommand "node" "prints node report(s)"
  hadoop_add_subcommand "nodemanager" "run a nodemanager on each slave"
  hadoop_add_subcommand "proxyserver" "run the web app proxy server"
  hadoop_add_subcommand "queue" "prints queue information"
  hadoop_add_subcommand "resourcemanager" "run the ResourceManager"
  hadoop_add_subcommand "rmadmin" "admin tools"
  hadoop_add_subcommand "scmadmin" "SharedCacheManager admin tools"
  hadoop_add_subcommand "sharedcachemanager" "run the SharedCacheManager daemon"
  hadoop_add_subcommand "timelineserver" "run the timeline server"
  hadoop_add_subcommand "top" "view cluster information"
  hadoop_add_subcommand "version" "print the version"
  hadoop_generate_usage "${MYNAME}" true
}


# let's locate libexec...
if [[ -n "${HADOOP_PREFIX}" ]]; then
  HADOOP_DEFAULT_LIBEXEC_DIR="${HADOOP_PREFIX}/libexec"
else
  bin=$(cd -P -- "$(dirname -- "${MYNAME}")" >/dev/null && pwd -P)
  HADOOP_DEFAULT_LIBEXEC_DIR="${bin}/../libexec"
fi

HADOOP_LIBEXEC_DIR="${HADOOP_LIBEXEC_DIR:-$HADOOP_DEFAULT_LIBEXEC_DIR}"
# shellcheck disable=SC2034
HADOOP_NEW_CONFIG=true
if [[ -f "${HADOOP_LIBEXEC_DIR}/yarn-config.sh" ]]; then
  . "${HADOOP_LIBEXEC_DIR}/yarn-config.sh"
else
  echo "ERROR: Cannot execute ${HADOOP_LIBEXEC_DIR}/yarn-config.sh." 2>&1
  exit 1
fi

# if no args specified, show usage
if [[ $# = 0 ]]; then
  hadoop_exit_with_usage 1
fi

# get arguments
COMMAND=$1
shift

case "${COMMAND}" in
  application|applicationattempt|container)
    CLASS=org.apache.hadoop.yarn.client.cli.ApplicationCLI
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
    set -- "${COMMAND}" "$@"
  ;;
  classpath)
    hadoop_do_classpath_subcommand CLASS "$@"
  ;;
  cluster)
    CLASS=org.apache.hadoop.yarn.client.cli.ClusterCLI
    hadoop_debug "Append YARN_CLIENT_OPTS onto YARN_OPTS"
    YARN_OPTS="${YARN_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  daemonlog)
    CLASS=org.apache.hadoop.log.LogLevel
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  envvars)
    echo "JAVA_HOME='${JAVA_HOME}'"
    echo "HADOOP_YARN_HOME='${HADOOP_YARN_HOME}'"
    echo "YARN_DIR='${YARN_DIR}'"
    echo "YARN_LIB_JARS_DIR='${YARN_LIB_JARS_DIR}'"
    echo "HADOOP_CONF_DIR='${HADOOP_CONF_DIR}'"
    echo "HADOOP_TOOLS_PATH='${HADOOP_TOOLS_PATH}'"
    exit 0
  ;;
  jar)
    CLASS=org.apache.hadoop.util.RunJar
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  historyserver)
    supportdaemonization="true"
    echo "DEPRECATED: Use of this command to start the timeline server is deprecated." 1>&2
    echo "Instead use the timelineserver command for it." 1>&2
    echo "Starting the History Server anyway..." 1>&2
    CLASS='org.apache.hadoop.yarn.server.applicationhistoryservice.ApplicationHistoryServer'
  ;;
  logs)
    CLASS=org.apache.hadoop.yarn.client.cli.LogsCLI
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  node)
    CLASS=org.apache.hadoop.yarn.client.cli.NodeCLI
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  nodemanager)
    supportdaemonization="true"
    CLASS='org.apache.hadoop.yarn.server.nodemanager.NodeManager'
    hadoop_debug "Append YARN_NODEMANAGER_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_NODEMANAGER_OPTS}"
    # Backwards compatibility
    if [[ -n "${YARN_NODEMANAGER_HEAPSIZE}" ]]; then
      HADOOP_HEAPSIZE_MAX="${YARN_NODEMANAGER_HEAPSIZE}"
    fi
  ;;
  proxyserver)
    supportdaemonization="true"
    CLASS='org.apache.hadoop.yarn.server.webproxy.WebAppProxyServer'
    hadoop_debug "Append YARN_PROXYSERVER_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_PROXYSERVER_OPTS}"
    # Backwards compatibility
    if [[ -n "${YARN_PROXYSERVER_HEAPSIZE}" ]]; then
      HADOOP_HEAPSIZE_MAX="${YARN_PROXYSERVER_HEAPSIZE}"
    fi
  ;;
  queue)
    CLASS=org.apache.hadoop.yarn.client.cli.QueueCLI
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  resourcemanager)
    supportdaemonization="true"
    CLASS='org.apache.hadoop.yarn.server.resourcemanager.ResourceManager'
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_RESOURCEMANAGER_OPTS}"
    hadoop_debug "Append YARN_RESOURCEMANAGER_OPTS onto HADOOP_OPTS"
    # Backwards compatibility
    if [[ -n "${YARN_RESOURCEMANAGER_HEAPSIZE}" ]]; then
      HADOOP_HEAPSIZE_MAX="${YARN_RESOURCEMANAGER_HEAPSIZE}"
    fi
  ;;
  rmadmin)
    CLASS='org.apache.hadoop.yarn.client.cli.RMAdminCLI'
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  scmadmin)
    CLASS='org.apache.hadoop.yarn.client.SCMAdmin'
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  sharedcachemanager)
    supportdaemonization="true"
    CLASS='org.apache.hadoop.yarn.server.sharedcachemanager.SharedCacheManager'
    hadoop_debug "Append YARN_SHAREDCACHEMANAGER_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_SHAREDCACHEMANAGER_OPTS}"
  ;;
  timelineserver)
    supportdaemonization="true"
    CLASS='org.apache.hadoop.yarn.server.applicationhistoryservice.ApplicationHistoryServer'
    hadoop_debug "Append YARN_TIMELINESERVER_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_TIMELINESERVER_OPTS}"
    # Backwards compatibility
    if [[ -n "${YARN_TIMELINESERVER_HEAPSIZE}" ]]; then
      HADOOP_HEAPSIZE_MAX="${YARN_TIMELINESERVER_HEAPSIZE}"
    fi
  ;;
  version)
    CLASS=org.apache.hadoop.util.VersionInfo
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  top)
    doNotSetCols=0
    doNotSetRows=0
    for i in "$@"; do
      if [[ $i == "-cols" ]]; then
        doNotSetCols=1
      fi
      if [[ $i == "-rows" ]]; then
        doNotSetRows=1
      fi
    done
    if [ $doNotSetCols == 0 ] && [ -n "${TERM}" ]; then
      cols=$(tput cols)
      if [ -n "$cols" ]; then
        args=( $@ )
        args=("${args[@]}" "-cols" "$cols")
        set -- "${args[@]}"
      fi
    fi
    if [ $doNotSetRows == 0 ] && [ -n "${TERM}" ]; then
      rows=$(tput lines)
      if [ -n "$rows" ]; then
        args=( $@ )
        args=("${args[@]}" "-rows" "$rows")
        set -- "${args[@]}"
      fi
    fi
    CLASS=org.apache.hadoop.yarn.client.cli.TopCLI
    hadoop_debug "Append YARN_CLIENT_OPTS onto HADOOP_OPTS"
    HADOOP_OPTS="${HADOOP_OPTS} ${YARN_CLIENT_OPTS}"
  ;;
  *)
    CLASS="${COMMAND}"
    if ! hadoop_validate_classname "${CLASS}"; then
      hadoop_exit_with_usage 1
    fi
  ;;
esac

hadoop_verify_user "${COMMAND}"

if [[ ${HADOOP_SLAVE_MODE} = true ]]; then
  hadoop_common_slave_mode_execute "${HADOOP_YARN_HOME}/bin/yarn" "${HADOOP_USER_PARAMS[@]}"
  exit $?
fi

daemon_outfile="${HADOOP_LOG_DIR}/hadoop-${HADOOP_IDENT_STRING}-${COMMAND}-${HOSTNAME}.out"
daemon_pidfile="${HADOOP_PID_DIR}/hadoop-${HADOOP_IDENT_STRING}-${COMMAND}.pid"

if [[  "${HADOOP_DAEMON_MODE}" != "default" ]]; then
  # shellcheck disable=SC2034
  HADOOP_ROOT_LOGGER="${HADOOP_DAEMON_ROOT_LOGGER}"
  HADOOP_LOGFILE="hadoop-${HADOOP_IDENT_STRING}-${COMMAND}-${HOSTNAME}.log"
fi

hadoop_finalize

if [[ -n "${supportdaemonization}" ]]; then
  if [[ -n "${secure_service}" ]]; then
    hadoop_secure_daemon_handler "${HADOOP_DAEMON_MODE}" "${COMMAND}" \
    "${CLASS}" "${daemon_pidfile}" "${daemon_outfile}" \
    "${priv_pidfile}" "${priv_outfile}" "${priv_errfile}" "$@"
  else
    hadoop_daemon_handler "${HADOOP_DAEMON_MODE}" "${COMMAND}" "${CLASS}" \
    "${daemon_pidfile}" "${daemon_outfile}" "$@"
  fi
  exit $?
else
  hadoop_java_exec "${COMMAND}" "${CLASS}" "$@"
fi