Paimon Lookup Join 是一种基于快照查询的维表关联方式，专为 Paimon 的 LSM 存储特性设计。它采用请求-响应模式，当主表数据到达时触发对维度表的点查询，返回维度表最新快照数据，而非实时关联。维度表需配置 merge-engine 为 deduplicate 或 partial-update，且 changelog-producer 必须设为 lookup。查询延迟取决于

spark window 本地任务异常

数据治理

hadoop journalnode

docker 问题

学习 docker-compose 部署hadoop集群、看到docker-compose 一种不同volumes定义方式version: "3"services:namenode:image: bde2020/hadoop-namenode:2.0.0-hadoop2.7.4-java8volumes:- namenode:/hadoop/dfs/nameenvironment:- CLUSTE

hadoop 及其周边组件问题记录

Failed to execute goal com.github.eirslett:frontend-maven-plugin:1.12.0:npm

[graphdriver] prior storage driver overlay2 failed: lstat /var/lib/docker/overlay2/f551c552eb04f2da3f62d5e90969667f068260217d52952eeaa6383e93c5b2d9: structure needs cleaninghttps://stackoverflow.com/q

[root@hadoop03 ~]# service docker startRedirecting to /bin/systemctl startdocker.serviceA dependency job for docker.service failed. See 'journalctl -xe' for details.[root@hadoop03 ~]# journalctl -xe..