log4j:ERROR Could not find value for key log4j.appender.error

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log4j:ERROR Could not find value for key log4j.appender.error

我是在rootLogger末尾增加R就好了. 终于我的配置环境例如以下: #设置日志的级别 ,多个以,分开(没有给出的,则不会被输出) log4j.rootLogger=info,error,R #DailyRollingFileAppender每天产生一个日志文件 log4j.appender.R=org.apache.log4j.DailyRollingFileAppender #设置日志文件保存路径 log4j.appender.R.File=logs/backup.log #日志输出格式…

MySQL主从复制中断，报“Error on master: message (format)='Cannot delete or update a parent row: a foreign key constraint fails' error code=1217” 错误

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MySQL添加外键时报错 ERROR 1215 (HY000): Cannot add foreign key constraint

laravel migrate时报错:Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes

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mysql执行带外键的sql文件时出现mysql ERROR 1215 (HY000): Cannot add foreign key constraint的解决

ERROR 1215 (HY000): Cannot add foreign key constraint 最近在建表时遇到了这个错误,然后找了下找到了解决办法,记录下: 本来是要建两张表: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 create table department( id int, name varchar(20) ); create table employee( id int primary key auto_increment, name v…

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