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我有兩張需要使用scala連接的HBase表格。這些表格使用sqoop從Oracle導入，並可用於查詢Hue數據瀏覽器如何在Spark中使用Scala連接兩個Hbase表格
使用Spark 1.5，Scala 2.10.4。
我使用的是從這裏HBase的數據連接器：https://github.com/nerdammer/spark-hbase-connector
import it.nerdammer.spark.hbase._
import org.apache.hadoop.hbase.client.{ HBaseAdmin, Result }
import org.apache.hadoop.hbase.{ HBaseConfiguration, HTableDescriptor }
import org.apache.hadoop.hbase.mapreduce.TableInputFormat
import org.apache.hadoop.hbase.io.ImmutableBytesWritable
import org.apache.spark._
import it.nerdammer.spark.hbase.conversion.{ FieldReader, FieldWriter }
import org.apache.hadoop.hbase.util.Bytes
case class Artist(id: String,
name: String,
age: Int);
case class Cd(id: String,
artistId: String,
title: String,
year: Int);
case class ArtistCd(id: String,
name: String,
title: String,
year: Int);
implicit def artistReader: FieldReader[Artist] = new FieldReader[Artist] {
override def map(data: HBaseData): Artist = Artist(
id = Bytes.toString(data.head.get),
name = Bytes.toString(data.drop(1).head.get),
age = Bytes.toInt(data.drop(2).head.get));
override def columns = Seq("NAME", "AGE");
};
implicit def cdReader: FieldReader[Cd] = new FieldReader[Cd] {
override def map(data: HBaseData): Cd = Cd(
id = Bytes.toString(data.head.get),
artistId = Bytes.toString(data.drop(1).head.get),
title = Bytes.toString(data.drop(2).head.get),
year = Bytes.toInt(data.drop(3).head.get));
override def columns = Seq("ARTIST_ID", "TITLE", "YEAR");
};
implicit def artistCdWriter: FieldWriter[ArtistCd] = new FieldWriter[ArtistCd] {
override def map(data: ArtistCd): HBaseData =
Seq(
Some(Bytes.toBytes(data.id)),
Some(Bytes.toBytes(data.name)),
Some(Bytes.toBytes(data.title)),
Some(Bytes.toBytes(data.year)));
override def columns = Seq("NAME", "TITLE", "YEAR");
};
val conf = new SparkConf().setAppName("HBase Join").setMaster("spark://localhost:7337")
val sc = new SparkContext(conf)
val artistRDD = sc.hbaseTable[Artist]("ARTISTS").inColumnFamily("cf")
val cdRDD = sc.hbaseTable[Cd]("CDS").inColumnFamily("cf")
val artistById = artistRDD.keyBy(f => f.id)
val cdById = cdRDD.keyBy(f => f.artistId)
val artistcd = artistById.join(cdById)
val artistCdRDD = artistcd.map(f => new ArtistCd(f._2._1.id, f._2._2.title, f._2._1.name, f._2._2.year))
artistCdRDD.toHBaseTable("ARTIST_CD").inColumnFamily("cf").save()
System.exit(1)
當我運行此我得到以下異常
16/01/22 14:27:04 WARN TaskSetManager: Lost task 0.0 in stage 5.0 (TID 3, localhost): org.apache.hadoop.hbase.client.RetriesExhaustedWithDetailsException: Failed 2068 actions: ARTIST_CD: 2068 times,
at org.apache.hadoop.hbase.client.AsyncProcess$BatchErrors.makeException(AsyncProcess.java:227)
at org.apache.hadoop.hbase.client.AsyncProcess$BatchErrors.access$1700(AsyncProcess.java:207)
at org.apache.hadoop.hbase.client.AsyncProcess.waitForAllPreviousOpsAndReset(AsyncProcess.java:1663)
at org.apache.hadoop.hbase.client.BufferedMutatorImpl.backgroundFlushCommits(BufferedMutatorImpl.java:208)
at org.apache.hadoop.hbase.client.BufferedMutatorImpl.doMutate(BufferedMutatorImpl.java:141)
at org.apache.hadoop.hbase.client.BufferedMutatorImpl.mutate(BufferedMutatorImpl.java:98)
at org.apache.hadoop.hbase.mapreduce.TableOutputFormat$TableRecordWriter.write(TableOutputFormat.java:129)
at org.apache.hadoop.hbase.mapreduce.TableOutputFormat$TableRecordWriter.write(TableOutputFormat.java:85)
at org.apache.spark.rdd.PairRDDFunctions$$anonfun$saveAsNewAPIHadoopDataset$1$$anonfun$12$$anonfun$apply$4.apply$mcV$sp(PairRDDFunctions.scala:1036)
at org.apache.spark.rdd.PairRDDFunctions$$anonfun$saveAsNewAPIHadoopDataset$1$$anonfun$12$$anonfun$apply$4.apply(PairRDDFunctions.scala:1034)
at org.apache.spark.rdd.PairRDDFunctions$$anonfun$saveAsNewAPIHadoopDataset$1$$anonfun$12$$anonfun$apply$4.apply(PairRDDFunctions.scala:1034)
at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1206)
at org.apache.spark.rdd.PairRDDFunctions$$anonfun$saveAsNewAPIHadoopDataset$1$$anonfun$12.apply(PairRDDFunctions.scala:1042)
at org.apache.spark.rdd.PairRDDFunctions$$anonfun$saveAsNewAPIHadoopDataset$1$$anonfun$12.apply(PairRDDFunctions.scala:1014)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
at org.apache.spark.scheduler.Task.run(Task.scala:88)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
如果有人在這方面的經驗，我會真的很感謝你的幫助
我在這裏看到了兩種解決方案How to Join two tables in Hbase和how to join tables in hbase，但不幸的是，我