Can I run the spark for the web application?

[#1]

We are trying to build web application using spark for various web applications , i.e returning the result in json which is processed by spark engine or Impala.

[#2]

Yes you can defintely spawn a Spark application from webservice.

SparkServer2 is meant for this purpose, It provides a JDBC connection through which you can submit a spark job.
* Do remember sparks jobs are not meant for a key value lookup. Please think in terms of Hbase, solr for such use cases.

[#3 · Accepted solution]

I believe you meant Spark "Thrift Server" @kgautam

https://community.hortonworks.com/articles/29928/using-spark-to-virtually-integrate-hadoop-with-ext....

http://spark.apache.org/docs/latest/sql-programming-guide.html#running-the-thrift-jdbcodbc-server

The alternative would be to use Apache Livy

http://livy.apache.org/docs/latest/programmatic-api.html