我有一段清除數據庫日志的腳用來按月清除數據庫中的日志文件然后再把它們按月分表存儲，腳本平時運行正常但是每到月初一定會報一次‘MySQL server has gone away’這樣的錯，不知道為什么！

腳本代碼如下：

class PaizuTableHandler extends ScriptBase

{

public static $mysql = null;

const LOG_PAIZU_TABLE = 'log_user_paiju';

public function logic()

{

if(empty(self::$mysql)){

self::$mysql = $this->mysql('logs');

}

set_time_limit(0);

while (true)

{

$date = date("Y-m-d");

$dataTime = strtotime($date);

$timestampStart = $dataTime - 3600*24; //昨天

$timestampEnd = mktime(0,0,0,date("m"),1,date("Y"));//本月月初 例如：2017-07-01 00:00:00

$timestampEnd_lastmoth = mktime(0, 0 , 0,date("m")-1,1,date("Y"));//上月月初 例如：2017-06-01 00:00:00

$transferLastMonth = mktime(0,0,0,date("m"),5,date("Y")); //月初第5天(轉移上月數據)

if($timestampStart < $timestampEnd){

sleep(60);

continue;

}

$table = self::LOG_PAIZU_TABLE.'_'.date("Ym");//本月的表

$lastMothTable = self::LOG_PAIZU_TABLE.'_'.date("Ym",mktime(0, 0 , 0,date("m")-1,1,date("Y")));//上個月的表

$hasTable = self::$mysql->tableExists($table); //判斷是否有本月的表

$hasTableLast = self::$mysql->tableExists($lastMothTable); //判斷是否有上個月的表

$createFlag = $hasTable ? true : false; //本月的表是否存在

$createFlagLast = $hasTableLast ? true : false; //上個月的表是否存在

if( empty( $createFlag ) ){

try {

//創建表

$createSql = "CREATE TABLE {$table} LIKE log_user_paiju";

$ret = self::$mysql->query($createSql);

if(!$ret){

//拋出異常

$errorMessage = self::$mysql -> error_no() . ": " . self::$mysql ->error();

throw new Exception($errorMessage);

}

} catch(Exception $ex) {

echo 'TIME:'.date("Y-m-d H:i:s")."\n";

echo 'TIME_START~TIME_END:'.date("Y-m-d H:i:s",$timestampStart)."~".date("Y-m-d H:i:s",$timestampEnd)."\n";

$msg = 'Error:'.$ex->getMessage()."\n";

$msg.= $ex->getTraceAsString()."\n";

$msg.= '異常行號：'.$ex->getLine()."\n";

$msg.= '所在文件：'.$ex->getFile()."\n";

//將異常信息記錄到日志中PHP異常處理之

echo $msg;

echo "\n";

break;

}

}

if( $createFlag ){

try {

//查詢本月當天應清空數據有沒有清空

$sql = "select * from log_user_paiju where UNIX_TIMESTAMP(`time`) between {$timestampEnd} and {$timestampStart} order by `time` desc limit 100";

$result = self::$mysql->query($sql);

$rs = self::$mysql -> fetch_row($result);

if( !$result ){

//拋出異常

$errorMessage = self::$mysql -> error_no() . ": " . self::$mysql ->error();

throw new Exception($errorMessage);

}

//處理上月數據(本月第5天把 上個月的數據全部放到上個月的表中(要放最少2天前))

$last_rs = array();

if($dataTime == $transferLastMonth && !empty( $createFlagLast ) && empty($rs)){

$last_sql = "select * from log_user_paiju where UNIX_TIMESTAMP(`time`) between {$timestampEnd_lastmoth} and {$timestampEnd} order by `time` desc limit 100";

$last_sql1 = "INSERT INTO {$lastMothTable}(uid,paiju_score,paizu_score,`time`,paizu_id,seq,room_id,server_id,creator,`status`,mahjongType,cid) SELECT uid,paiju_score,paizu_score,`time`,paizu_id,seq,room_id,server_id,creator,`status`,mahjongType,cid FROM log_user_paiju where UNIX_TIMESTAMP(`time`) between {$timestampEnd_lastmoth} and {$timestampEnd} order by `time` desc limit 100";

$last_sql2 = "delete from log_user_paiju where UNIX_TIMESTAMP(`time`) between {$timestampEnd_lastmoth} and {$timestampEnd} order by `time` desc limit 100";

$result1 = self::$mysql->query($last_sql);

//var_dump($result1);

if(!$result1){

//拋出異常

$errorMessage = self::$mysql -> error_no() . ": " . self::$mysql ->error();

throw new Exception($errorMessage);

}

$last_rs = self::$mysql -> fetch_row($result1);

if($last_rs){

if($r = self::$mysql->query($last_sql1)){

self::$mysql->query($last_sql2);

}else{

//拋出異常

$errorMessage = self::$mysql -> error_no() . ": " . self::$mysql ->error();

throw new Exception($errorMessage);

}

}

}

//處理本月數據

$sql1 = "INSERT INTO {$table}(uid,paiju_score,paizu_score,`time`,paizu_id,seq,room_id,server_id,creator,`status`,mahjongType,cid) SELECT uid,paiju_score,paizu_score,`time`,paizu_id,seq,room_id,server_id,creator,`status`,mahjongType ,cid FROM log_user_paiju where UNIX_TIMESTAMP(`time`) between {$timestampEnd} and {$timestampStart} order by `time` desc limit 100";

$sql2 = "delete from log_user_paiju where UNIX_TIMESTAMP(`time`) between {$timestampEnd} and {$timestampStart} order by `time` desc limit 100";

if(empty($rs) && empty($last_rs)){

sleep(60);

}

if($rs){

if($r1=self::$mysql->query($sql1)){

!self::$mysql->query($sql2);

}else{

//拋出異常

$errorMessage = self::$mysql -> error_no() . ": " . self::$mysql ->error();

throw new Exception($errorMessage);

}

}

} catch(Exception $ex) {

echo 'TIME:'.date("Y-m-d H:i:s")."\n";

echo 'TIME_START~TIME_END:'.date("Y-m-d H:i:s",$timestampStart)."~".date("Y-m-d H:i:s",$timestampEnd)."\n";

$msg = 'Error:'.$ex->getMessage()."\n";

$msg.= $ex->getTraceAsString()."\n";

$msg.= '異常行號：'.$ex->getLine()."\n";

$msg.= '所在文件：'.$ex->getFile()."\n";

//將異常信息記錄到日志中PHP異常處理之

echo $msg;

echo "\n";

break;

}

}

usleep(3000);

}

}

}

shell腳本如下：

#!/bin/sh

# scripts daemon, add to /etc/crontab

# */1 * * * * root PATH/script.sh --daemon

# run on root

if [ "$(uname -s|grep -F 'CYGWIN')" = "" ] && [ $UID -ne 0 ]; then

echo "superuser privileges are required to run this script."

exit 1

fi

# settings

PHP_CLI="/usr/bin/php -c /usr/local/php/etc/php.ini"

SCRIPTS="PaijuLogHandler PaijuTableHandler PaizuTableHandler ClubDiamondLogHandler"

# paths

BASE_PATH=$(cd $(dirname $0) && pwd)

BASE_SCRIPT="$BASE_PATH/script.php"

LOGS_PATH="$BASE_PATH/data/logs/bash.log"

USAGE="Usage: $(basename $0) [-d|-a|-k SCRIPT]\n\

-d, --daemon\t\tthe daemon mode, runing checking\n\

-a, --killall\t\tkill the all scripts\n\

-k, --kill SCRIPT\tkill the SCRIPT\n\

-h, --help\t\tthis help text"

function get_pid()

{

echo $(ps -ef|grep -F "$1"|grep -v "grep"|awk '{print $2}')

}

function kill_script()

{

PID=$(get_pid "$1")

if [ "$PID" = "" ]; then

echo "$1 not found"

else

kill -9 $PID

echo "$1 has been killed, pid: $PID"

fi

}

case $1 in

-k|--kill)

if [ "$2" = "" ]; then

echo -e $USAGE

exit 0

fi

kill_script "$BASE_SCRIPT request/$2"

;;

-a|--killall)

for SCRIPT in $SCRIPTS; do

kill_script "$BASE_SCRIPT request/$SCRIPT"

done

;;

-d|--daemon)

for SCRIPT in $SCRIPTS; do

SCRIPT="$BASE_SCRIPT request/$SCRIPT"

PID=$(get_pid "$SCRIPT")

if [ "$PID" = "" ]; then

eval "$PHP_CLI $SCRIPT >>/data/logs/scriptlog/log.txt 2>&1 &"

PID=$(get_pid "$SCRIPT")

echo "[$(date +%Y-%m-%d\ %H:%M:%S)] $SCRIPT has been down, restarted: $PID" >> $LOGS_PATH

fi

done

;;

*)

echo -e $USAGE

;;

esac

報錯如下：

TIME:2018-02-02 00:00:48

Error:2006: MySQL server has gone away

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