I received the error ORA-01008: not all variables bound when i execute the logstash config file.can u pls tell about this error.Thanks in advance

[chelseia]

input{
jdbc{
clean_run => true
jdbc_driver_library => "C:/Program Files/SQL Developer 4/jdbc/lib/ojdbc8.jar"
jdbc_driver_class => "Java::oracle.jdbc.driver.OracleDriver"
jdbc_connection_string => ""
jdbc_user => "user"
jdbc_password => "pwd"
statement => "select * from bucket_truck"

}

}
output{
elasticsearch{
hosts =>"http://localhost:9200"
index =>"we1"
document_id => "%{id}"
document_type => "doc"
}
stdout{}
}