Flink入门篇-编译源码（上）

前置

所需环境	版本
java	“11” 2018-09-25
scala	2.11.12
maven	3.5.2
windows	win10 家庭版
flink	last commit-id 7df486e4 （master）

下载源码

git clone https://github.com/apache/flink

这个应该得等一会儿
此刻抽根烟。。。

进行编译

1. 进入dos界面
	win+r
2. 进入源码根目录
	cd C:\Users\18380\myself\coder\flink
3. 执行命令
	mvn clean install -DskipTests -Drat.skip=true

看到这个页面的时候，那么恭喜你，编译成功了，如果你没有遇到问题，那你应该去买彩票了，如遇到下面问题，可以参考。

编译问题集锦

1.Too many files with unapproved license: 2

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 15.393 s
[INFO] Finished at: 2020-07-01T06:47:43+08:00
[INFO] Final Memory: 79M/277M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.rat:apache-rat-plugin:0.12:check (default) on project flink-parent: Too many files with unapproved license: 2 See RAT report in: C:\Users\18380\myself\coder\flink\target\rat.txt -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn  -rf :flink-parent

解决办法就是跳过认证：

加上 -Drat.skip=true
即 mvn clean install -DskipTests -Drat.skip=true

2.Failed to execute goal on project flink-avro-confluent-registry: Could not resolve dependencies

[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:10 h
[INFO] Finished at: 2020-07-03T23:23:14+08:00
[INFO] Final Memory: 383M/1304M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project flink-avro-confluent-registry: Could not resolve dependencies for project org.apache.flink:flink-avro-confluent-registry:jar:1.12-SNAPSHOT: Failure to find io.confluent:kafka-schema-registry-client:jar:4.1.0 in http://maven.aliyun.com/nexus/content/groups/public was cached in the local repository, resolution will not be reattempted until the update interval of nexus-aliyun has elapsed or updates are forced -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn  -rf :flink-avro-confluent-registry

解决办法：
分析：
此类问题，就是没在远程仓库里面找到对应的包，那么就手动去找到并且下载。

找到下载地址：
http://packages.confluent.io/maven/io/confluent/kafka-schema-registry-client/4.1.0/

将上面的包下载下来之后放到该路径下（根据你的本地地址是什么，相对地址一定要填写正确好，mvn编译的时候会去对应的坐标找包）

没有下面的这个路径的话，就自己创建
.m2\repository\io\confluent\kafka-schema-registry-client\4.1.0

如下图所示：

然后再次执行下面的命令

mvn clean install -DskipTests -Drat.skip=true

终于编译成功了，磕磕绊绊的。下篇就是将编译好的包部署测试一下。