problem parsing csv file with columns having number of separator values(ex: comma) using logstash

I am facing problem parsing csv file using logstash:

logstash version:2.3.3

Actually my csv files has comma separated values, But for some field have string values separated by comma(",") inside particular column.

So while trying to parse the file using following configuration, the fields are parsing as mentioned in the csv plugin but later values are getting parsed as column 15=>.., column 16 =>..., etc because some fields have comma(",") as included values......:

configuration:----
csv
{
columns => ["time1","split","time2","id","name","level",,"load","on","rid","service","session","task"]
separator => ","
}