## 背景
重新编译 elasticsearch-hadoop 包；
GitHub - elastic/elasticsearch-hadoop at 6.8
编译 7.17 版本时很正常，注意设置下环境变量就好，JAVA8_HOME/....
编译 6.8 版本时（要求jdk8 / jdk9），出现异常
1. Could not resolve org.springframework.build.gradle:propdeps-plugin:0.0.7.
2. Could not resolve cascading:cascading-local:2.6.3.
3. Could not resolve org.elasticsearch.gradle:build-tools:6.8.24-SNAPSHOT
4. Could not resolve cascading:cascading-hadoop:2.6.3.
## 分析（尝试逐个解决）
1. gradle 仓库修改
// ali库 解决 Could not resolve org.springframework.build.gradle:propdeps-plugin:0.0.7.
maven{ url 'https://maven.aliyun.com/repository/central'}
maven{ url 'https://maven.aliyun.com/repository/public' }
maven{ url 'https://maven.aliyun.com/repository/google'}
maven{ url 'https://maven.aliyun.com/repository/gradle-plugin'}
maven{ url 'https://maven.aliyun.com/repository/spring'}
maven{ url 'https://maven.aliyun.com/repository/spring-plugin'}
maven{ url 'https://maven.aliyun.com/mvn/guide'}
maven{ url 'https://maven.aliyun.com/repository/apache-snapshots'}2. esh-version.properties 修改
6.8.24-SNAPSHOT -> 6.8.23
3. cascading-local 这个包始终无法获取
## 最终解决
本质原因有2个，一个是 repo.spring.io 改造成需要验证了，不验证会有401；另一个是http://conjars.org/repo 已经失效了，需要替换；
所以前面修改的全部回滚，完整解决方案如下：
1. 处理 propdeps-plugin 包，增加阿里云的库
// ali库 propdeps-plugin
maven{ url 'https://maven.aliyun.com/repository/central'}
maven{ url 'https://maven.aliyun.com/repository/public' }
maven{ url 'https://maven.aliyun.com/repository/google'}
maven{ url 'https://maven.aliyun.com/repository/gradle-plugin'}
maven{ url 'https://maven.aliyun.com/repository/spring'}
maven{ url 'https://maven.aliyun.com/repository/spring-plugin'}
maven{ url 'https://maven.aliyun.com/mvn/guide'}
maven{ url 'https://maven.aliyun.com/repository/apache-snapshots'}2. 修改 buildSrc/src/main/groovy/org/elasticsearch/hadoop/gradle/BuildPlugin.groovy
全部的 http://conjars.org/repo 或者 https://conjars.org/repo
替换成 https://conjars.wensel.net/repo## 参考：
1. Notice of Permissions Changes to repo.spring.io, January 2023
2. https://segmentfault.com/q/1010000043853512
3. spring源码编译问题解决1，Received status code 401 from server问题，not found问题，更换阿里云镜像_received status code 401 from server:-CSDN博客
4. https://github.com/elastic/elasticsearch-hadoop/issues/984
5. How to build a plugin for a not yet released version? - Elasticsearch - Discuss the Elastic Stack文章来源：https://www.toymoban.com/news/detail-777098.html
6. conjars.org: Connection timed out_http://conjars.org/repo 地址失效-CSDN博客文章来源地址https://www.toymoban.com/news/detail-777098.html
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