本文是在集群已经搭建好的基础上来说的，还没有搭建好集群的小伙伴还请自行百度！
启动spark-shell之前要先启动hive metastore 和 hiveservice2
hive --service metastore &
hiveserver2
然后再启动spark-shell
spark-shell --master yarn --deploy-medo client
启动之后可能会抛出一些异常
[root@master hadoop]# spark-shell --master yarn --deploy-mode client
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
18/06/04 09:46:55 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
18/06/04 09:47:00 WARN Client: Neither spark.yarn.jars nor spark.yarn.archive is set, falling back to uploading libraries under SPARK_HOME.
18/06/04 09:47:35 WARN DFSClient: Caught exception
java.lang.InterruptedException
at java.lang.Object.wait(Native Method)
at java.lang.Thread.join(Thread.java:1252)
at java.lang.Thread.join(Thread.java:1326)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.closeResponder(DFSOutputStream.java:609)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.endBlock(DFSOutputStream.java:370)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:546)
18/06/04 09:47:59 WARN HiveConf: HiveConf of name hive.metastore.hbase.aggregate.stats.false.positive.probability does not exist
18/06/04 09:47:59 WARN HiveConf: HiveConf of name hive.llap.io.orc.time.counters does not exist
18/06/04 09:47:59 WARN HiveConf: HiveConf of name hive.orc.splits.ms.footer.cache.ppd.enabled does not exist
18/06/04 09:47:59 WARN HiveConf: HiveConf of name hive.server2.metrics.enabled does not exist
18/06/04 09:47:59 WARN HiveConf: HiveConf of name hive.llap.am.liveness.connection.timeout.ms does not exist
18/06/04 09:47:59 WARN HiveConf: HiveConf of name hive.server2.thrift.client.connect.retry.limit does not exist
18/06/04 09:47:59 WARN HiveConf: HiveConf of name hive.llap.io.allocator.direct does not exist
18/06/04 09:47:59 WARN HiveConf: HiveConf of name hive.llap.auto.enforce.stats does not exist
18/06/04 09:47:59 WARN HiveConf: HiveConf of name hive.llap.client.consistent.splits does not exist
这些警告不影响咱们的运行
scala> val rdd=sc.parallelize(1 to 100,5)
rdd: org.apache.spark.rdd.RDD[Int] = ParallelCollectionRDD[] at parallelize at <console>:24scala> rdd.count
res0: Long = 100 scala>
spark的UI页面
