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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.printssc.start
结论
支持:mv file to basedir(/home/testhdfs2)
支持:mv directory to basedir 链接:更多网易技术、产品、运营经验分享请。
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