謝謝這位大哥：http://blog.csdn.net/u014137486/article/details/54381249
最近發現測試服務器的內存突然爆了，通過：

top
shift + m

查看發現，在tomcat關閉的情況下，有8條java進程在后臺運行。產生的原因不明，只是之前做了tomcat內存設置：

JAVA_OPTS="-server -Xms256m -Xmx512m -Xss256K -XX:PermSize=128m -XX:MaxPermSize=256m"

原因慢慢再找

先記錄下解決方案、

elif [ "$1" = "stop" ] ; then
 
  shift
 
  SLEEP=5
  if [ ! -z "$1" ]; then
    echo $1 | grep "[^0-9]" >/dev/null 2>&1
    if [ $? -gt 0 ]; then
      SLEEP=$1
      shift
    fi
  fi
 
  FORCE=0
  if [ "$1" = "-force" ]; then
    shift
    FORCE=1
  fi
 
  if [ ! -z "$CATALINA_PID" ]; then
    if [ -f "$CATALINA_PID" ]; then
      if [ -s "$CATALINA_PID" ]; then
        kill -0 `cat "$CATALINA_PID"` >/dev/null 2>&1
        if [ $? -gt 0 ]; then
          echo "PID file found but no matching process was found. Stop aborted."
          exit 1
        fi
      else
        echo "PID file is empty and has been ignored."
      fi
    else
      echo "\$CATALINA_PID was set but the specified file does not exist. Is Tomcat running? Stop aborted."
      exit 1
    fi
  fi
 
  eval "\"$_RUNJAVA\"" $LOGGING_MANAGER $JAVA_OPTS \
    -Djava.endorsed.dirs="\"$JAVA_ENDORSED_DIRS\"" -classpath "\"$CLASSPATH\"" \
    -Dcatalina.base="\"$CATALINA_BASE\"" \
    -Dcatalina.home="\"$CATALINA_HOME\"" \
    -Djava.io.tmpdir="\"$CATALINA_TMPDIR\"" \
    org.apache.catalina.startup.Bootstrap "$@" stop
 
  # stop failed. Shutdown port disabled? Try a normal kill.
  if [ $? != 0 ]; then
    if [ ! -z "$CATALINA_PID" ]; then
      echo "The stop command failed. Attempting to signal the process to stop through OS signal."
      kill -15 `cat "$CATALINA_PID"` >/dev/null 2>&1
    fi
  fi
 
  if [ ! -z "$CATALINA_PID" ]; then
    if [ -f "$CATALINA_PID" ]; then
      while [ $SLEEP -ge 0 ]; do
        kill -0 `cat "$CATALINA_PID"` >/dev/null 2>&1
        if [ $? -gt 0 ]; then
          rm -f "$CATALINA_PID" >/dev/null 2>&1
          if [ $? != 0 ]; then
            if [ -w "$CATALINA_PID" ]; then
              cat /dev/null > "$CATALINA_PID"
              # If Tomcat has stopped don't try and force a stop with an empty PID file
              FORCE=0
            else
              echo "The PID file could not be removed or cleared."
            fi
          fi
          echo "Tomcat stopped."
          break
        fi
        if [ $SLEEP -gt 0 ]; then
          sleep 1
        fi
        if [ $SLEEP -eq 0 ]; then
          echo "Tomcat did not stop in time."
          if [ $FORCE -eq 0 ]; then
            echo "PID file was not removed."
          fi
          echo "To aid diagnostics a thread dump has been written to standard out."
          kill -3 `cat "$CATALINA_PID"`
        fi
        SLEEP=`expr $SLEEP - 1 `
      done
    fi
  fi
 
  KILL_SLEEP_INTERVAL=5
  if [ $FORCE -eq 1 ]; then
    if [ -z "$CATALINA_PID" ]; then
      echo "Kill failed: \$CATALINA_PID not set"
    else
      if [ -f "$CATALINA_PID" ]; then
        PID=`cat "$CATALINA_PID"`
        echo "Killing Tomcat with the PID: $PID"
        kill -9 $PID
        while [ $KILL_SLEEP_INTERVAL -ge 0 ]; do
            kill -0 `cat "$CATALINA_PID"` >/dev/null 2>&1
            if [ $? -gt 0 ]; then
                rm -f "$CATALINA_PID" >/dev/null 2>&1
                if [ $? != 0 ]; then
                    if [ -w "$CATALINA_PID" ]; then
                        cat /dev/null > "$CATALINA_PID"
                    else
                        echo "The PID file could not be removed."
                    fi
                fi
                echo "The Tomcat process has been killed."
                break
            fi
            if [ $KILL_SLEEP_INTERVAL -gt 0 ]; then
                sleep 1
            fi
            KILL_SLEEP_INTERVAL=`expr $KILL_SLEEP_INTERVAL - 1 `
        done
        if [ $KILL_SLEEP_INTERVAL -lt 0 ]; then
            echo "Tomcat has not been killed completely yet. The process might be waiting on some system call or might be UNINTERRUPTIBLE."
        fi
      fi
    fi
  fi
  # Add by afei on 2016-12-09 start
  # find pid of /home/test/tomcat ,then kill force PIDS
  echo "Force kill PIDS begin:"
  ps -ef | grep /home/test/tomcat | grep -v grep | grep -v catalina.sh | awk '{print $2}' | xargs echo
  ps -ef | grep /home/test/tomcat | grep -v grep | grep -v catalina.sh | awk '{print $2}' | xargs kill -9
  echo "Force kill PIDS end!"
  # Add by afei on 2016-12-09 end
 
elif [ "$1" = "configtest" ] ; then

通過

ps -ef | grep /home/test/tomcat | grep -v grep | grep -v catalina.sh |awk '{print $2}' | xargs kill -9

關鍵字匹配進程，然后通過 kill -9 殺掉