深度解析MySQL启动时报“The server quit without updating PID file”错误的原因

#!/bin/sh# Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB# This file is public domain and comes with NO WARRANTY of any kind# MySQL daemon start/stop script.# Usually this is put in /etc/init.d (at least on machines SYSV R4 based# systems) and linked to /etc/rc3.d/S99mysql and /etc/rc0.d/K01mysql.# When this is done the mysql server will be started when the machine is# started and shut down when the systems goes down.# Comments to support chkconfig on RedHat Linux# chkconfig: 2345 64 36# description: A very fast and reliable SQL database engine.# Comments to support LSB init script conventions### BEGIN INIT INFO# Provides: mysql# Required-Start: $local_fs $network $remote_fs# Should-Start: ypbind nscd ldap ntpd xntpd# Required-Stop: $local_fs $network $remote_fs# Default-Start: 2 3 4 5# Default-Stop: 0 1 6# Short-Description: start and stop MySQL# Description: MySQL is a very fast and reliable SQL database engine.### END INIT INFO# If you install MySQL on some other places than /usr/local/mysql, then you# have to do one of the following things for this script to work:## - Run this script from within the MySQL installation directory# - Create a /etc/my.cnf file with the following information:# [mysqld]# basedir=<path-to-mysql-installation-directory># - Add the above to any other configuration file (for example ~/.my.ini)# and copy my_print_defaults to /usr/bin# - Add the path to the mysql-installation-directory to the basedir variable# below.## If you want to affect other MySQL variables, you should make your changes# in the /etc/my.cnf, ~/.my.cnf or other MySQL configuration files.# If you change base dir, you must also change datadir. These may get# overwritten by settings in the MySQL configuration files.basedir=datadir=# Default value, in seconds, afterwhich the script should timeout waiting# for server start. # Value here is overriden by value in my.cnf. # 0 means don't wait at all# Negative numbers mean to wait indefinitelyservice_startup_timeout=900# Lock directory for RedHat / SuSE.lockdir='/var/lock/subsys'lock_file_path="$lockdir/mysql"# The following variables are only set for letting mysql.server find things.# Set some defaultsmysqld_pid_file_path=if test -z "$basedir"then basedir=/usr/local/mysql bindir=/usr/local/mysql/bin if test -z "$datadir" then datadir=/usr/local/mysql/data fi sbindir=/usr/local/mysql/bin libexecdir=/usr/local/mysql/binelse bindir="$basedir/bin" if test -z "$datadir" then datadir="$basedir/data" fi sbindir="$basedir/sbin" libexecdir="$basedir/libexec"fi# datadir_set is used to determine if datadir was set (and so should be# *not* set inside of the --basedir= handler.)datadir_set=## Use LSB init script functions for printing messages, if possible#lsb_functions="/lib/lsb/init-functions"if test -f $lsb_functions ; then . $lsb_functionselse log_success_msg() { echo " SUCCESS! $@" } log_failure_msg() { echo " ERROR! $@" }fiPATH="/sbin:/usr/sbin:/bin:/usr/bin:$basedir/bin"export PATHmode=$1 # start or stop[ $# -ge 1 ] && shiftother_args="$*" # uncommon, but needed when called from an RPM upgrade action   # Expected: "--skip-networking --skip-grant-tables"   # They are not checked here, intentionally, as it is the resposibility   # of the "spec" file author to give correct arguments only.case `echo "testing/c"`,`echo -n testing` in *c*,-n*) echo_n= echo_c=  ;; *c*,*) echo_n=-n echo_c=  ;; *)  echo_n= echo_c='/c' ;;esacparse_server_arguments() { for arg do case "$arg" in  --basedir=*) basedir=`echo "$arg" | sed -e 's/^[^=]*=//'`     bindir="$basedir/bin"   if test -z "$datadir_set"; then    datadir="$basedir/data"   fi   sbindir="$basedir/sbin"   libexecdir="$basedir/libexec"  ;;  --datadir=*) datadir=`echo "$arg" | sed -e 's/^[^=]*=//'`   datadir_set=1 ;;  --pid-file=*) mysqld_pid_file_path=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;  --service-startup-timeout=*) service_startup_timeout=`echo "$arg" | sed -e 's/^[^=]*=//'` ;; esac done}wait_for_pid () { verb="$1"   # created | removed pid="$2"   # process ID of the program operating on the pid-file pid_file_path="$3" # path to the PID file. i=0 avoid_race_condition="by checking again" while test $i -ne $service_startup_timeout ; do case "$verb" in  'created')  # wait for a PID-file to pop into existence.  test -s "$pid_file_path" && i='' && break  ;;  'removed')  # wait for this PID-file to disappear  test ! -s "$pid_file_path" && i='' && break  ;;  *)  echo "wait_for_pid () usage: wait_for_pid created|removed pid pid_file_path"  exit 1  ;; esac # if server isn't running, then pid-file will never be updated if test -n "$pid"; then  if kill -0 "$pid" 2>/dev/null; then  : # the server still runs  else  # The server may have exited between the last pid-file check and now.   if test -n "$avoid_race_condition"; then   avoid_race_condition=""   continue # Check again.  fi  # there's nothing that will affect the file.  log_failure_msg "The server quit without updating PID file ($pid_file_path)."  return 1 # not waiting any more.  fi fi echo $echo_n ".$echo_c" i=`expr $i + 1` sleep 1 done if test -z "$i" ; then log_success_msg return 0 else log_failure_msg return 1 fi}# Get arguments from the my.cnf file,# the only group, which is read from now on is [mysqld]if test -x ./bin/my_print_defaultsthen print_defaults="./bin/my_print_defaults"elif test -x $bindir/my_print_defaultsthen print_defaults="$bindir/my_print_defaults"elif test -x $bindir/mysql_print_defaultsthen print_defaults="$bindir/mysql_print_defaults"else # Try to find basedir in /etc/my.cnf conf=/etc/my.cnf print_defaults= if test -r $conf then subpat='^[^=]*basedir[^=]*=/(.*/)$' dirs=`sed -e "/$subpat/!d" -e 's///1/' $conf` for d in $dirs do  d=`echo $d | sed -e 's/[  ]//g'`  if test -x "$d/bin/my_print_defaults"  then  print_defaults="$d/bin/my_print_defaults"  break  fi  if test -x "$d/bin/mysql_print_defaults"  then  print_defaults="$d/bin/mysql_print_defaults"  break  fi done fi # Hope it's in the PATH ... but I doubt it test -z "$print_defaults" && print_defaults="my_print_defaults"fi## Read defaults file from 'basedir'. If there is no defaults file there# check if it's in the old (depricated) place (datadir) and read it from there#extra_args=""if test -r "$basedir/my.cnf"then extra_args="-e $basedir/my.cnf"else if test -r "$datadir/my.cnf" then extra_args="-e $datadir/my.cnf" fifiparse_server_arguments `$print_defaults $extra_args mysqld server mysql_server mysql.server`## Set pid file if not given#if test -z "$mysqld_pid_file_path"then mysqld_pid_file_path=$datadir/`hostname`.pidelse case "$mysqld_pid_file_path" in /* ) ;; * ) mysqld_pid_file_path="$datadir/$mysqld_pid_file_path" ;; esacficase "$mode" in 'start') # Start daemon # Safeguard (relative paths, core dumps..) cd $basedir echo $echo_n "Starting MySQL" if test -x $bindir/mysqld_safe then  # Give extra arguments to mysqld with the my.cnf file. This script  # may be overwritten at next upgrade.  $bindir/mysqld_safe --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &  wait_for_pid created "$!" "$mysqld_pid_file_path"; return_value=$?  # Make lock for RedHat / SuSE  if test -w "$lockdir"  then  touch "$lock_file_path"  fi  exit $return_value else  log_failure_msg "Couldn't find MySQL server ($bindir/mysqld_safe)" fi ;; 'stop') # Stop daemon. We use a signal here to avoid having to know the # root password. if test -s "$mysqld_pid_file_path" then  mysqld_pid=`cat "$mysqld_pid_file_path"`  if (kill -0 $mysqld_pid 2>/dev/null)  then  echo $echo_n "Shutting down MySQL"  kill $mysqld_pid  # mysqld should remove the pid file when it exits, so wait for it.  wait_for_pid removed "$mysqld_pid" "$mysqld_pid_file_path"; return_value=$?  else  log_failure_msg "MySQL server process #$mysqld_pid is not running!"  rm "$mysqld_pid_file_path"  fi  # Delete lock for RedHat / SuSE  if test -f "$lock_file_path"  then  rm -f "$lock_file_path"  fi  exit $return_value else  log_failure_msg "MySQL server PID file could not be found!" fi ;; 'restart') # Stop the service and regardless of whether it was # running or not, start it again. if $0 stop $other_args; then  $0 start $other_args else  log_failure_msg "Failed to stop running server, so refusing to try to start."  exit 1 fi ;; 'reload'|'force-reload') if test -s "$mysqld_pid_file_path" ; then  read mysqld_pid < "$mysqld_pid_file_path"  kill -HUP $mysqld_pid && log_success_msg "Reloading service MySQL"  touch "$mysqld_pid_file_path" else  log_failure_msg "MySQL PID file could not be found!"  exit 1 fi ;; 'status') # First, check to see if pid file exists if test -s "$mysqld_pid_file_path" ; then   read mysqld_pid < "$mysqld_pid_file_path"  if kill -0 $mysqld_pid 2>/dev/null ; then   log_success_msg "MySQL running ($mysqld_pid)"  exit 0  else  log_failure_msg "MySQL is not running, but PID file exists"  exit 1  fi else  # Try to find appropriate mysqld process  mysqld_pid=`pidof $libexecdir/mysqld`  # test if multiple pids exist  pid_count=`echo $mysqld_pid | wc -w`  if test $pid_count -gt 1 ; then  log_failure_msg "Multiple MySQL running but PID file could not be found ($mysqld_pid)"  exit 5  elif test -z $mysqld_pid ; then   if test -f "$lock_file_path" ; then    log_failure_msg "MySQL is not running, but lock file ($lock_file_path) exists"   exit 2  fi   log_failure_msg "MySQL is not running"  exit 3  else  log_failure_msg "MySQL is running but PID file could not be found"  exit 4  fi fi ;; *)  # usage  basename=`basename "$0"`  echo "Usage: $basename {start|stop|restart|reload|force-reload|status} [ MySQL server options ]"  exit 1 ;;esacexit 0

basedir=datadir=# Default value, in seconds, afterwhich the script should timeout waiting# for server start. # Value here is overriden by value in my.cnf. # 0 means don't wait at all# Negative numbers mean to wait indefinitelyservice_startup_timeout=900# Lock directory for RedHat / SuSE.lockdir='/var/lock/subsys'lock_file_path="$lockdir/mysql"

lockdir='/var/lock/subsys'

# Set some defaultsmysqld_pid_file_path=if test -z "$basedir"then basedir=/usr/local/mysql bindir=/usr/local/mysql/bin if test -z "$datadir" then datadir=/usr/local/mysql/data fi sbindir=/usr/local/mysql/bin libexecdir=/usr/local/mysql/binelse bindir="$basedir/bin" if test -z "$datadir" then datadir="$basedir/data" fi sbindir="$basedir/sbin" libexecdir="$basedir/libexec"fi

## Use LSB init script functions for printing messages, if possible#lsb_functions="/lib/lsb/init-functions"if test -f $lsb_functions ; then . $lsb_functionselse log_success_msg() { echo " SUCCESS! $@" } log_failure_msg() { echo " ERROR! $@" }fi

PATH="/sbin:/usr/sbin:/bin:/usr/bin:$basedir/bin"export PATHmode=$1 # start or stop[ $# -ge 1 ] && shiftother_args="$*" # uncommon, but needed when called from an RPM upgrade action   # Expected: "--skip-networking --skip-grant-tables"   # They are not checked here, intentionally, as it is the resposibility   # of the "spec" file author to give correct arguments only.case `echo "testing/c"`,`echo -n testing` in *c*,-n*) echo_n= echo_c=  ;; *c*,*) echo_n=-n echo_c=  ;; *)  echo_n= echo_c='/c' ;;esac

parse_server_arguments() { for arg do case "$arg" in  --basedir=*) basedir=`echo "$arg" | sed -e 's/^[^=]*=//'`     bindir="$basedir/bin"   if test -z "$datadir_set"; then    datadir="$basedir/data"   fi   sbindir="$basedir/sbin"   libexecdir="$basedir/libexec"  ;;  --datadir=*) datadir=`echo "$arg" | sed -e 's/^[^=]*=//'`   datadir_set=1 ;;  --pid-file=*) mysqld_pid_file_path=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;  --service-startup-timeout=*) service_startup_timeout=`echo "$arg" | sed -e 's/^[^=]*=//'` ;; esac done}

# Get arguments from the my.cnf file,# the only group, which is read from now on is [mysqld]if test -x ./bin/my_print_defaultsthen print_defaults="./bin/my_print_defaults"elif test -x $bindir/my_print_defaultsthen print_defaults="$bindir/my_print_defaults"elif test -x $bindir/mysql_print_defaultsthen print_defaults="$bindir/mysql_print_defaults"else # Try to find basedir in /etc/my.cnf conf=/etc/my.cnf print_defaults= if test -r $conf then subpat='^[^=]*basedir[^=]*=/(.*/)$' dirs=`sed -e "/$subpat/!d" -e 's///1/' $conf` for d in $dirs do  d=`echo $d | sed -e 's/[  ]//g'`  if test -x "$d/bin/my_print_defaults"  then  print_defaults="$d/bin/my_print_defaults"  break  fi  if test -x "$d/bin/mysql_print_defaults"  then  print_defaults="$d/bin/mysql_print_defaults"  break  fi done fi # Hope it's in the PATH ... but I doubt it test -z "$print_defaults" && print_defaults="my_print_defaults"fi

## Read defaults file from 'basedir'. If there is no defaults file there# check if it's in the old (depricated) place (datadir) and read it from there#extra_args=""if test -r "$basedir/my.cnf"then extra_args="-e $basedir/my.cnf"else if test -r "$datadir/my.cnf" then extra_args="-e $datadir/my.cnf" fifi

parse_server_arguments `$print_defaults $extra_args mysqld server mysql_server mysql.server`

## Set pid file if not given#if test -z "$mysqld_pid_file_path"then mysqld_pid_file_path=$datadir/`hostname`.pidelse case "$mysqld_pid_file_path" in /* ) ;; * ) mysqld_pid_file_path="$datadir/$mysqld_pid_file_path" ;; esacfi

case "$mode" in 'start') # Start daemon # Safeguard (relative paths, core dumps..) cd $basedir echo $echo_n "Starting MySQL" if test -x $bindir/mysqld_safe then  # Give extra arguments to mysqld with the my.cnf file. This script  # may be overwritten at next upgrade.  $bindir/mysqld_safe --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &  wait_for_pid created "$!" "$mysqld_pid_file_path"; return_value=$?  # Make lock for RedHat / SuSE  if test -w "$lockdir"  then  touch "$lock_file_path"  fi  exit $return_value else  log_failure_msg "Couldn't find MySQL server ($bindir/mysqld_safe)" fi ;;

wait_for_pid created "$!" "$mysqld_pid_file_path"; return_value=$?

if test -z "$i" ; then log_success_msg return 0 else log_failure_msg return 1 fi

echo $echo_n ".$echo_c"i=`expr $i + 1`sleep 1

log_failure_msg "The server quit without updating PID file ($pid_file_path)."

wait_for_pid () { verb="$1"   # created | removed pid="$2"   # process ID of the program operating on the pid-file pid_file_path="$3" # path to the PID file. i=0 avoid_race_condition="by checking again" while test $i -ne $service_startup_timeout ; do case "$verb" in  'created')  # wait for a PID-file to pop into existence.  test -s "$pid_file_path" && i='' && break  ;;  'removed')  # wait for this PID-file to disappear  test ! -s "$pid_file_path" && i='' && break  ;;  *)  echo "wait_for_pid () usage: wait_for_pid created|removed pid pid_file_path"  exit 1  ;; esac # if server isn't running, then pid-file will never be updated if test -n "$pid"; then  if kill -0 "$pid" 2>/dev/null; then  : # the server still runs  else  # The server may have exited between the last pid-file check and now.   if test -n "$avoid_race_condition"; then   avoid_race_condition=""   continue # Check again.  fi  # there's nothing that will affect the file.  log_failure_msg "The server quit without updating PID file ($pid_file_path)."  return 1 # not waiting any more.  fi fi echo $echo_n ".$echo_c" i=`expr $i + 1` sleep 1 done if test -z "$i" ; then log_success_msg return 0 else log_failure_msg return 1 fi}

'stop') # Stop daemon. We use a signal here to avoid having to know the # root password. if test -s "$mysqld_pid_file_path" then  mysqld_pid=`cat "$mysqld_pid_file_path"`  if (kill -0 $mysqld_pid 2>/dev/null)  then  echo $echo_n "Shutting down MySQL"  kill $mysqld_pid  # mysqld should remove the pid file when it exits, so wait for it.  wait_for_pid removed "$mysqld_pid" "$mysqld_pid_file_path"; return_value=$?  else  log_failure_msg "MySQL server process #$mysqld_pid is not running!"  rm "$mysqld_pid_file_path"  fi  # Delete lock for RedHat / SuSE  if test -f "$lock_file_path"  then  rm -f "$lock_file_path"  fi  exit $return_value else  log_failure_msg "MySQL server PID file could not be found!" fi ;;

 'restart') # Stop the service and regardless of whether it was # running or not, start it again. if $0 stop $other_args; then  $0 start $other_args else  log_failure_msg "Failed to stop running server, so refusing to try to start."  exit 1 fi ;;

kill -HUP pid

 'reload'|'force-reload') if test -s "$mysqld_pid_file_path" ; then  read mysqld_pid < "$mysqld_pid_file_path"  kill -HUP $mysqld_pid && log_success_msg "Reloading service MySQL"  touch "$mysqld_pid_file_path" else  log_failure_msg "MySQL PID file could not be found!"  exit 1 fi ;;

 'status') # First, check to see if pid file exists if test -s "$mysqld_pid_file_path" ; then   read mysqld_pid < "$mysqld_pid_file_path"  if kill -0 $mysqld_pid 2>/dev/null ; then   log_success_msg "MySQL running ($mysqld_pid)"  exit 0  else  log_failure_msg "MySQL is not running, but PID file exists"  exit 1  fi else  # Try to find appropriate mysqld process  mysqld_pid=`pidof $libexecdir/mysqld`  # test if multiple pids exist  pid_count=`echo $mysqld_pid | wc -w`  if test $pid_count -gt 1 ; then  log_failure_msg "Multiple MySQL running but PID file could not be found ($mysqld_pid)"  exit 5  elif test -z $mysqld_pid ; then   if test -f "$lock_file_path" ; then    log_failure_msg "MySQL is not running, but lock file ($lock_file_path) exists"   exit 2  fi   log_failure_msg "MySQL is not running"  exit 3  else  log_failure_msg "MySQL is running but PID file could not be found"  exit 4  fi fi ;;

 *)  # usage  basename=`basename "$0"`  echo "Usage: $basename {start|stop|restart|reload|force-reload|status} [ MySQL server options ]"  exit 1 ;;

basedir=/usr/local/mysql-advanced-5.6.23-linux-glibc2.5-x86_64datadir=conf=/usr/local/mysql-advanced-5.6.23-linux-glibc2.5-x86_64/my_3308.cnf 

extra_args=" -e $basedir/my.cnf.bak"if test -r "$basedir/my.cnf"then extra_args="-e $basedir/my.cnf"else if test -r "$datadir/my.cnf" then extra_args="-e $datadir/my.cnf" fifiextra_args=" -c $conf"

 $bindir/mysqld_safe --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &

  $bindir/mysqld_safe --defaults-file="$conf" --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null 2>&1 &