linux：ffmpeg服务安装

达梦数据库：shardingsphere + pageHelper分页查询结果集属性全部为null

Java：ShardingSphere使用information_schema查询时报错：Table '数据库名称.tables' doesn't exist

达梦数据库：无法解析的成员访问表达式[GROUP_CONCAT]

达梦数据库：select报错：不是 GROUP BY 表达式

达梦数据库：链接数据库报错：无效的模式名[xxx]

Failed to execute goal org.apache.maven.plugins:maven-resources-plugin:3.2.0:resources (default-resources) on project xxx-xxx-xxx: Input length = 1 -> [Help 1]To see the full stack trace of the errors

解决tomcat启动报错：ERROR: transport error 202: bind failed: Cannot assign requested address

nginx代理websocket报错recv() failed (104: Connection reset by peer) while proxying upgraded connection

使用@Transaction注解时Mysql事务锁等待超时Cause: com.mysql.cj.jdbc.exceptions.MySQLTransactionRollbackException: Lock wait timeout exceeded; try restarting transaction;Lock wait timeout exceeded; try restarting tr