"Cannot run program 'spark-submit' " when start Livy after RPM install hue

[Wang Bin]

Before RPM, "hue/apps/spark/" directory structure as follows:

-babel.cfg

-hueversion.py -> ../../VERSION

-hueversion.pyc

-java

        -bin

        -conf

                -livy-defaults.conf.tmpl

        -dist.xml

        -livy-assembly

        -livy-core

        -livy-repl

        -livy-server

        -livy-yarn

        -pom.xml

        -README.rst

        -target

-java-lib

-Makefile

-setup.py

-src

        -spark

        -spark.egg-info

After RPM and install, "hue/apps/spark/" directory structure as follows:

-babel.cfg

-ext-eggs

-hueversion.py

-hueversion.pyc

-java-lib

        -livy-assembly.jar

-Makefile

-setup.py

-src

        -spark

        -spark.egg-info

configured "/etc/profile" as follows:

# set spark environment

SPARK_HOME=/home/spark/

export SPARK_HOME

export PATH=${PATH}:${SPARK_HOME}/bin

the hue file

... 

su -s /bash/shell root "cd /var/log/hue/ && nohup /usr/lib/hue/build/env/bin/hue livy_server > livy.log &"

...

when "service hue start", the livy.log as follows: 

Failed to run spark-submit executable: java.io.IOException: Cannot run program "spark-submit": error=2, No such file or directory

I have tried as follows:

1, insert the congiguration into "/etc/hue/conf.empty/hue.ini"

livy.server.spark-submit = /home/spark/bin/spark-submit

The same Error as the log.

2、I want to configure the spark-submit into livy-defaults.conf, but no found the file.