Question

我是sharkle的noobie - 虽然我确实有一些火花的经验。每次尝试从鲨鱼中检索数据都是悬而未决。

作为初步步骤：让我们确保火花健康起来：

spark>
val tf = sc.textFile("hdfs://10.213.39.125:8020/hadoop/example/20417.txt")

 val c = tf.count 
..
14/04/10 19:44:34 INFO SparkContext: Job finished: count at <console>:14, took 0.161135127 s
c: Long = 12761

我已仔细检查过shark-env.sh指向火花安装的正确位置..

现在让我们去鲨鱼并尝试（a）阅读相同的文件和（b）阅读鲨鱼表

（a）

shark>
       val tf = sc.textFile("hdfs://10.213.39.125:8020/hadoop/example/20417.txt")                          
tf: org.apache.spark.rdd.RDD[String] = MappedRDD[4] at textFile at <console>:17

scala>  val c2 = tf.count      
(wait minutes .. finally do control -c)


shark>
sc.makeRDD("select * from dual")
res1: org.apache.spark.rdd.RDD[Char] = ParallelCollectionRDD[2] at makeRDD at <console>:18

scala> res1.collect                                                                                        

(Once again:  wait minutes .. finally do control -c)

java.lang.InterruptedException
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at org.apache.spark.scheduler.JobWaiter.awaitResult(JobWaiter.scala:62)
        at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:313)
        at org.apache.spark.SparkContext.runJob(SparkContext.scala:725)
        at org.apache.spark.SparkContext.runJob(SparkContext.scala:744)
        at org.apache.spark.SparkContext.runJob(SparkContext.scala:758)
        at org.apache.spark.SparkContext.runJob(SparkContext.scala:772)
        at org.apache.spark.rdd.RDD.collect(RDD.scala:560)

更多详情

以下是shark-env.sh的相关部分

export SPARK_MEM=2g

# (Required) Set the master program's memory
export SHARK_MASTER_MEM=1g

# (Required) Point to your Scala installation.
export SCALA_HOME="/usr/local/scala-2.9.3"

# (Required) Point to the patched Hive binary distribution
export HIVE_HOME="/home/guest/shark-0.8.0-bin-hadoop1/hive-0.9.0-shark-0.8.0-bin"

# For running Shark in distributed mode, set the following:
export HADOOP_HOME="/usr/local/hadoop"
export SPARK_HOME="/home/guest/spark-0.8.0"
export MASTER="spark://swlab-r03-16L:17087"

从shark-shell，让我们确保我们正在与同一个火花服务器进行通信

scala> sc.sparkHome
res0: String = /home/guest/spark-0.8.0

scala> sc.isLocal                                                                                          
res1: Boolean = false

scala> sc.master
res2: String = spark://swlab-r03-16L:17087

Answer 1

似乎有hive Metastore配置问题。 Metastore参数位于shark-hive- / conf / hive-site.xml

下

鲨鱼入门：所有查询都悬空

1 个答案: