I cannot manage to get data into my es instance.
This is what input jdbc looks like 
jdbc {
type => "B"
jdbc_connection_string => "jdbc:oracle:thin:@//fff.ff.ff.f:1521/fff"
jdbc_driver_class => "Java::oracle.jdbc.driver.OracleDriver"
jdbc_user => "fff"
jdbc_password => "ffff"
statement => "select update_date from i_log order by insert_date desc"
use_column_value => true
tracking_column => "update_date"
jdbc_paging_enabled => "true"
jdbc_page_size => "50000"
tracking_column_type => "numeric"
schedule => "0 * * * *"
clean_run => true
last_run_metadata_path => "/data/application/.logstash_jdbc_last_run"
}
I heavily suspect that about Java configuration but dont kno how to fix this.