zoukankan      html  css  js  c++  java
  • com.mysql.jdbc.PacketTooBigException: Packet for query is too large (1078 > 1024). You can change this value on the server by setting the max_allowed_packet' variable.

    报错:

    com.mysql.jdbc.PacketTooBigException: Packet for query is too large (1078 > 1024). You can change this value on the server by setting the max_allowed_packet' variable.
    	at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3678) ~[mysql-connector-java-5.1.45.jar:5.1.45]
    	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2509) ~[mysql-connector-java-5.1.45.jar:5.1.45]
    	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680) ~[mysql-connector-java-5.1.45.jar:5.1.45]
    	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2484) ~[mysql-connector-java-5.1.45.jar:5.1.45]
    	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858) ~[mysql-connector-java-5.1.45.jar:5.1.45]
    	at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1197) ~[mysql-connector-java-5.1.45.jar:5.1.45]
    	at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_execute(FilterChainImpl.java:3051) [druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.filter.FilterAdapter.preparedStatement_execute(FilterAdapter.java:1080) ~[druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_execute(FilterChainImpl.java:3049) [druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.filter.FilterEventAdapter.preparedStatement_execute(FilterEventAdapter.java:440) [druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_execute(FilterChainImpl.java:3049) [druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.wall.WallFilter.preparedStatement_execute(WallFilter.java:619) [druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_execute(FilterChainImpl.java:3049) [druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.filter.FilterEventAdapter.preparedStatement_execute(FilterEventAdapter.java:440) [druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_execute(FilterChainImpl.java:3049) [druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.proxy.jdbc.PreparedStatementProxyImpl.execute(PreparedStatementProxyImpl.java:167) [druid-1.1.8.jar:1.1.8]
    	at com.alibaba.druid.pool.DruidPooledPreparedStatement.execute(DruidPooledPreparedStatement.java:498) [druid-1.1.8.jar:1.1.8]
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_191]
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_191]
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_191]
    	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_191]
    	at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:59) [mybatis-3.4.6.jar:3.4.6]
    

    原因:

    MySQL根据配置文件会限制Server接受的数据包大小。有时候大的插入和更新会受 max_allowed_packet 参数限制,导致大数据写入或者更新失败。

    解决:

    进入数据库,执行:show VARIABLES like '%max_allowed_packet%';

    太小导致出错。

    在linux下,进入到mysql安装目录下,进入到:

    /usr/local/mysql,找到my.cnf,增加一行

    max_allowed_packet = 20M

    如果没找到my.cnf,进入跟路径下:cd /  使用命令搜索:find -name my.cnf

    重启mysql:service mysql restart

    执行查看:show VARIABLES like '%max_allowed_packet%';

    执行代码,不报错误了。

  • 相关阅读:
    UCloud可用区的设计理念及功能图文详解
    Centos优化Hadoop
    Linux下使用fdisk扩展分区容量
    Linux内核之数据双链表
    安装 openSUSE Leap 42.1 之后要做的 8 件事
    Linux的防火墙–Iptables
    【转】c# thread.join 理解
    【转】Oracle 查询库中所有表名、字段名、表名说明、字段名说明
    【转】WinForms 使用Graphics绘制字体阴影
    WPF 如何加载图片
  • 原文地址:https://www.cnblogs.com/DreamFather/p/11347309.html
Copyright © 2011-2022 走看看