coerce exception while adding a rule to the security group

[murtaza52]

Hi,

I am trying to add a new rule to a security group I created.

(http://docs.aws.amazon.com/AWSSdkDocsJava/latest/DeveloperGuide/authorize-ingress.html)

(ns aws-infra.security-groups
(:require [amazonica.core :as aws-core :refer [defcredential]]
[amazonica.aws.ec2 :as aws-ec2])))

(aws-ec2/authorize-security-group-ingress
:group-name "test-group"
:ip-permissions [{:cidr-ip "21.21.22.23/32"
:ip-protocol "tcp"
:from-port "22"
:to-port "22"}])

I get the below exception, can you please help ?

java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Character
RT.java:1087 clojure.lang.RT.intCast
core.clj:846 clojure.core/int
core.clj:314 amazonica.core/coerce-value
core.clj:508 amazonica.core/invoke-method
AFn.java:160 clojure.lang.AFn.applyToHelper

[murtaza52]

I was breaking my head over this from last couple of hrs. Giving the form-port as integer instead of a string solved it. Sorry for spamming you. Do you have suggestions how I can debug / trace such errors ?

[mcohen01]

It helps to have a Java background. And for many tasks you need to have the Javadocs open in the browser, and then you'd see setFromPort takes an int as its argument.