f6a9a57a72
sbin/spark-daemon.sh used ps -p "$TARGET_PID" -o args= to figure out whether the process running with the expected PID is actually a Spark daemon. When running with a large classpath, the output of ps gets truncated and the check fails spuriously. This weakens the check to see if it's a java command (which is something we do in other parts of the script) rather than looking for the specific main class name. This means that SPARK-4832 might happen under a slightly broader range of circumstances (a java program happened to reuse the same PID), but it seems worthwhile compared to failing consistently with a large classpath. Author: Punya Biswal <pbiswal@palantir.com> Closes #5535 from punya/feature/SPARK-6952 and squashes the following commits: 7ea12d1 [Punya Biswal] Handle long args when detecting PID reuse
223 lines
5.1 KiB
Bash
Executable file
223 lines
5.1 KiB
Bash
Executable file
#!/usr/bin/env bash
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#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Runs a Spark command as a daemon.
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#
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# Environment Variables
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#
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# SPARK_CONF_DIR Alternate conf dir. Default is ${SPARK_HOME}/conf.
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# SPARK_LOG_DIR Where log files are stored. ${SPARK_HOME}/logs by default.
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# SPARK_MASTER host:path where spark code should be rsync'd from
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# SPARK_PID_DIR The pid files are stored. /tmp by default.
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# SPARK_IDENT_STRING A string representing this instance of spark. $USER by default
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# SPARK_NICENESS The scheduling priority for daemons. Defaults to 0.
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##
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usage="Usage: spark-daemon.sh [--config <conf-dir>] (start|stop|status) <spark-command> <spark-instance-number> <args...>"
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# if no args specified, show usage
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if [ $# -le 1 ]; then
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echo $usage
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exit 1
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fi
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sbin="`dirname "$0"`"
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sbin="`cd "$sbin"; pwd`"
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. "$sbin/spark-config.sh"
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# get arguments
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# Check if --config is passed as an argument. It is an optional parameter.
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# Exit if the argument is not a directory.
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if [ "$1" == "--config" ]
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then
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shift
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conf_dir="$1"
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if [ ! -d "$conf_dir" ]
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then
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echo "ERROR : $conf_dir is not a directory"
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echo $usage
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exit 1
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else
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export SPARK_CONF_DIR="$conf_dir"
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fi
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shift
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fi
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option=$1
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shift
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command=$1
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shift
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instance=$1
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shift
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spark_rotate_log ()
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{
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log=$1;
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num=5;
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if [ -n "$2" ]; then
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num=$2
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fi
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if [ -f "$log" ]; then # rotate logs
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while [ $num -gt 1 ]; do
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prev=`expr $num - 1`
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[ -f "$log.$prev" ] && mv "$log.$prev" "$log.$num"
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num=$prev
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done
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mv "$log" "$log.$num";
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fi
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}
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. "$SPARK_PREFIX/bin/load-spark-env.sh"
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if [ "$SPARK_IDENT_STRING" = "" ]; then
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export SPARK_IDENT_STRING="$USER"
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fi
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export SPARK_PRINT_LAUNCH_COMMAND="1"
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# get log directory
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if [ "$SPARK_LOG_DIR" = "" ]; then
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export SPARK_LOG_DIR="$SPARK_HOME/logs"
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fi
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mkdir -p "$SPARK_LOG_DIR"
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touch "$SPARK_LOG_DIR"/.spark_test > /dev/null 2>&1
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TEST_LOG_DIR=$?
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if [ "${TEST_LOG_DIR}" = "0" ]; then
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rm -f "$SPARK_LOG_DIR"/.spark_test
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else
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chown "$SPARK_IDENT_STRING" "$SPARK_LOG_DIR"
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fi
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if [ "$SPARK_PID_DIR" = "" ]; then
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SPARK_PID_DIR=/tmp
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fi
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# some variables
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log="$SPARK_LOG_DIR/spark-$SPARK_IDENT_STRING-$command-$instance-$HOSTNAME.out"
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pid="$SPARK_PID_DIR/spark-$SPARK_IDENT_STRING-$command-$instance.pid"
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# Set default scheduling priority
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if [ "$SPARK_NICENESS" = "" ]; then
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export SPARK_NICENESS=0
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fi
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run_command() {
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mode="$1"
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shift
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mkdir -p "$SPARK_PID_DIR"
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if [ -f "$pid" ]; then
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TARGET_ID="$(cat "$pid")"
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if [[ $(ps -p "$TARGET_ID" -o comm=) =~ "java" ]]; then
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echo "$command running as process $TARGET_ID. Stop it first."
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exit 1
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fi
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fi
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if [ "$SPARK_MASTER" != "" ]; then
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echo rsync from "$SPARK_MASTER"
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rsync -a -e ssh --delete --exclude=.svn --exclude='logs/*' --exclude='contrib/hod/logs/*' "$SPARK_MASTER/" "$SPARK_HOME"
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fi
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spark_rotate_log "$log"
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echo "starting $command, logging to $log"
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case "$mode" in
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(class)
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nohup nice -n "$SPARK_NICENESS" "$SPARK_PREFIX"/bin/spark-class $command "$@" >> "$log" 2>&1 < /dev/null &
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newpid="$!"
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;;
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(submit)
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nohup nice -n "$SPARK_NICENESS" "$SPARK_PREFIX"/bin/spark-submit --class $command "$@" >> "$log" 2>&1 < /dev/null &
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newpid="$!"
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;;
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(*)
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echo "unknown mode: $mode"
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exit 1
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;;
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esac
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echo "$newpid" > "$pid"
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sleep 2
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# Check if the process has died; in that case we'll tail the log so the user can see
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if [[ ! $(ps -p "$newpid" -o comm=) =~ "java" ]]; then
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echo "failed to launch $command:"
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tail -2 "$log" | sed 's/^/ /'
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echo "full log in $log"
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fi
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}
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case $option in
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(submit)
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run_command submit "$@"
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;;
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(start)
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run_command class "$@"
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;;
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(stop)
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if [ -f $pid ]; then
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TARGET_ID="$(cat "$pid")"
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if [[ $(ps -p "$TARGET_ID" -o comm=) =~ "java" ]]; then
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echo "stopping $command"
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kill "$TARGET_ID" && rm -f "$pid"
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else
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echo "no $command to stop"
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fi
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else
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echo "no $command to stop"
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fi
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;;
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(status)
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if [ -f $pid ]; then
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TARGET_ID="$(cat "$pid")"
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if [[ $(ps -p "$TARGET_ID" -o comm=) =~ "java" ]]; then
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echo $command is running.
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exit 0
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else
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echo $pid file is present but $command not running
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exit 1
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fi
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else
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echo $command not running.
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exit 2
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fi
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;;
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(*)
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echo $usage
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exit 1
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;;
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esac
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