錯誤提示：
user: 'root' host: `localhost' (Got timeout reading communication packets)
MYSQL server has gone away

引起這個原因是不可怕的．原因是更改了系統(tǒng)的斷開時間．

mysql>show gloable variables like "%timeout%";
進(jìn)行查看
interactive_timeout　的黓認(rèn)值為28800
wait_timeout 的默認(rèn)值這：120

根據(jù)情況增加吧．
這兩個值是一個全局變量，可以動態(tài)增加，如：
mysql> set global interactive_timeout=28800;
Query OK, 0 rows affected (0.00 sec)
mysql> show global variables like "interactive_timeout";
+---------------------+-------+
| Variable_name | Value |
+---------------------+-------+
| interactive_timeout | 28800 |
+---------------------+-------+
1 row in set (0.00 sec)

可以導(dǎo)致Got timeout reading communication packets錯誤的原因

https://dev.mysql.com/doc/refman/5.5/en/communication-errors.html

可能導(dǎo)致Got Timeout reading communication packets錯誤的原因有如下幾個：

A client attempts to access a database but has no privileges for it.（沒有權(quán)限）

A client uses an incorrect password.(密碼錯誤)

A connection packet does not contain the right information.(連接沒有包含正確信息)

It takes more than connect_timeout seconds to obtain a connect packet. (獲取連接信息起過connect_timeout的時長)

The client program did not call mysql_close() before exiting.(客戶端沒有調(diào)用mysql_close()函數(shù))

The client had been sleeping more than wait_timeout or interactive_timeout seconds without issuing any requests to the server. (客戶端的空連接時間過長，超過了wait_timeout和interactive_timeout的時間)

The client program ended abruptly in the middle of a data transfer.(數(shù)據(jù)傳輸過程中終結(jié))

錯誤排查：

因為我們手機(jī)版與pc端的php函數(shù)不同步導(dǎo)致的問題，所以仔細(xì)檢查一下問題就解決了。

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