[spark] Cannot run program "spark-submit" error

[polingsky]

dear:

when I enter spark/ page and click add a new snippet (python or scala)
and an error showed in ./build/env/bin/hue livy_server

java.io.IOException: Cannot run program "spark-submit": error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1041) ~[na:1.7.0_60]
at com.cloudera.hue.livy.server.sessions.ProcessSession$.startProcess(ProcessSession.scala:43) ~[livy-assembly.jar:na]
at com.cloudera.hue.livy.server.sessions.ProcessSession$.create(ProcessSession.scala:13) ~[livy-assembly.jar:na]
at com.cloudera.hue.livy.server.ProcessSessionFactory$$anonfun$createSession$2.apply(SessionFactory.scala:36) ~[livy-assembly.jar:na]
at com.cloudera.hue.livy.server.ProcessSessionFactory$$anonfun$createSession$2.apply(SessionFactory.scala:34) ~[livy-assembly.jar:na]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) ~[livy-assembly.jar:na]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) ~[livy-assembly.jar:na]
at scala.concurrent.forkjoin.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1417) [livy-assembly.jar:na]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:262) [livy-assembly.jar:na]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:975) [livy-assembly.jar:na]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1478) [livy-assembly.jar:na]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104) [livy-assembly.jar:na]
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method) ~[na:1.7.0_60]
at java.lang.UNIXProcess.(UNIXProcess.java:186) ~[na:1.7.0_60]
at java.lang.ProcessImpl.start(ProcessImpl.java:130) ~[na:1.7.0_60]
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1022) ~[na:1.7.0_60]
... 11 common frames omitted
127.0.0.1 - - - 06/Aug/2015:10:29:10 +0800 "POST /sessions HTTP/1.1" 500 90

does anyone know the problem??
my hue version is 3.8.1

thanks

[romainr]

Do you have Spark installed on the machine?

It says that it can't find the 'spark-submit' command that comes with Spark.