此文已由作者岳猛授权网易云社区发布。
欢迎访问网易云社区,了解更多网易技术产品运营经验。
Structure Stream访问方式
code examples
import org.apache.spark.sql.streaming._ val df = spark.readStream.text("/home/testhdfs") val ps = df.writeStream.format("console").outputMode(OutputMode.Append).start
结论
basedir = /home/testhdfs
支持:mv file to basedir(/home/testhdfs)
不支持:mv directory to basedir
如果往basedir里面添加文件夹会出现ERROR:
java.lang.AssertionError: assertion failed: Conflicting directory structures detected. Suspicious paths: hdfs://172.17.1.180:9000/home/testhdfs/data1 hdfs://172.17.1.180:9000/home/testhdfsIf provided paths are partition directories, please set "basePath" in the options of the data source to specify the root directory of the table. If there are multiple root directories, please load them separately and then union them.
spark streaming 访问方式
测试textFile接口使用
import org.apache.spark.streaming._ val ssc = StreamingContext.getActiveOrCreate(() => new StreamingContext(sc, Seconds(120))) val ds1 = ssc.textFileStream("/home/testhdfs2") ds1.print ssc.start
结论
支持:mv file to basedir(/home/testhdfs2)
支持:mv directory to basedir
链接:https://www.jianshu.com/p/9eb8ff8f0660
更多网易技术、产品、运营经验分享请点击。
相关文章:
【推荐】 网易云容器服务微服务化实践—微服务测试及镜像化提测全流程实践