按课程里方式下载flink1.11.2源码编译报错，一部分问题包都安装解决了。剩下一个flink-hadoop-fs依赖的还不行。报错：[ERROR] Failed to execute goal on project flink-hadoop-fs: Could not resolve dependencies for project org.apache.flink:flink-hadoop-fs:jar:1.11.2: The following artifacts could not be resolved: org.apache.hadoop:hadoop-hdfs:jar:tests:2.6.0-cdh5.12.1, org.apache.hadoop:hadoop-common:jar:tests:2.6.0-cdh5.12.1: Failure to find org.apache.hadoop:hadoop-hdfs:jar:tests:2.6.0-cdh5.12.1 in https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced