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我能够将结构化流式处理的结果写入实验性文件。问题是这些文件在本地文件系统中,现在我想将它们写入hadoop文件系统。有没有办法做到这一点?结构化流式传输将实验性文件写入hadoop
StreamingQuery query = result //.orderBy("window")
.repartition(1)
.writeStream()
.outputMode(OutputMode.Append())
.format("parquet")
.option("checkpointLocation", "hdfs://localhost:19000/data/checkpoints")
.start("hdfs://localhost:19000/data/total");
我用这个代码,但它说:
Exception in thread "main" java.lang.IllegalArgumentException: Wrong FS: hdfs://localhost:19000/data/checkpoints/metadata, expected: file:///
at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:649)
at org.apache.hadoop.fs.RawLocalFileSystem.pathToFile(RawLocalFileSystem.java:82)
at org.apache.hadoop.fs.RawLocalFileSystem.deprecatedGetFileStatus(RawLocalFileSystem.java:606)
at org.apache.hadoop.fs.RawLocalFileSystem.getFileLinkStatusInternal(RawLocalFileSystem.java:824)
at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:601)
at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:421)
at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1426)
at org.apache.spark.sql.execution.streaming.StreamMetadata$.read(StreamMetadata.scala:51)
at org.apache.spark.sql.execution.streaming.StreamExecution.<init>(StreamExecution.scala:100)
at org.apache.spark.sql.streaming.StreamingQueryManager.createQuery(StreamingQueryManager.scala:232)
at org.apache.spark.sql.streaming.StreamingQueryManager.startQuery(StreamingQueryManager.scala:269)
at org.apache.spark.sql.streaming.DataStreamWriter.start(DataStreamWriter.scala:262)
at org.apache.spark.sql.streaming.DataStreamWriter.start(DataStreamWriter.scala:206)
感谢
它的工作原理,以及我使用:SparkSession.builder() .appName( “火花数据处理”) 的.master( “本地[2]”) 的.config( “spark.hadoop.fs.defaultFS”, “hdfs:// localhost:19000”) .getOrCreate(); – taniGroup
是的,这是一样的。 – zsxwing