我们先来看一段代码 create table if not exists test ( event_time DATETIME NOT NULL COMMENT "datetime of event", event_type INT NOT NULL COMMENT "type of event", user_id INT COMMENT "id of user", device_code INT COMMENT "device...
情景一: 将程序提交到集群,即执行spark-submit命令时时,出现Compression codec com.hadoop.compression.lzo.LzoCodec not found. 或 Class com.hadoop.compression.lzo.LzoCodec not found [root@myhadoop spark-yarn]$ bin/spark-submit \
--clas...
DBeaver常见问题 驱动相关驱动安装时报错Maven artifact xxx no found问题现象问题原因解决方案 连接数据库时报错Error org.postgresql.driver not loaded问题现象问题原因解决方案 连接数据库时报错Failed to load driver class org.postgresql.Driver DBeaver下载地址...
1、问题描述: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool 2、简要分析: redis.clients.util.Pool.getResource会从JedisPool实例池中返回一个可用的redis连接。分析源码可知JedisPool 继承了 redis.cl...
Mybatis-Plus eq、ne、gt、lt、ge、le分别代表含义 eq 就是 equal等于ne就是 not equal不等于gt 就是 greater than大于lt 就是 less than小于ge 就是 greater than or equal 大于等于le 就是 less than or equal 小于等于in 就是 in 包含(数组)isNull 就是 等...