org.apache.hadoop.fs.UnsupportedFileSystemException: No FileSystem for scheme “hdfs“

       Configuration configuration = new Configuration();
        FileSystem fs = FileSystem.get(new URI("hdfs://172.17.0.123:9000"), configuration, "hadoop");

可能是没有引入hadoop-hdfs-client，要么将maven依赖的hadoop-hdfs-client的scope注释掉

    <dependency>
      <groupId>org.apache.hadoop</groupId>
      <artifactId>hadoop-hdfs-client</artifactId>
      <version>3.3.0</version>
<!--      <scope>provided</scope>-->
    </dependency>

本文转自:https://blog.csdn.net/faceqq/article/details/113767399?spm=1001.2101.3001.6661.1&utm_medium=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-1-113767399-blog-104797892.t5_landing_title_tags_v2&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-2%7Edefault%7ECTRLIST%7ERate-1-113767399-blog-104797892.t5_landing_title_tags_v2&utm_relevant_index=1