maxReplicaCount doesnt work for Scaling Jobs using ScaledObject

[dangelm]

i am trying to execute a job per message in rabbitmq.
Setting maxReplicaCount for ScaledObject of 'job' type is not doing anything. i would expect that if i set this value to x, and there is x messages in the queue, x jobs will be created.
my yaml file looks like this:

apiVersion: keda.k8s.io/v1alpha1
kind: ScaledObject
metadata:
name: {scaled-object-name}
spec:
scaleType: job
jobTargetRef:
deploymentName: {scaled-object-name}
parallelism: 1
completions: 1
activeDeadlineSeconds: 300
backoffLimit: 1
template:
# job description - starting image with nodejs app with rabbit listener
pollingInterval: 5
cooldownPeriod: 5
minReplicaCount: 0
maxReplicaCount: 20
triggers:
- type: prometheus
metadata:
serverAddress: {promotheus address}
metricName: {metric name for rabbit metrics in promotheus}
threshold: 1
query: {queue-name}

Expected Behavior

for x messages in the queue i would expect x jobs would be created.

Actual Behavior

only 1 job is created and only after termination a new job spawns.

Steps to Reproduce the Problem

1. start 5 jobs simultaneously

Specifications

• KEDA Version: 1.3
• Platform & Version: linux 64bit
• Kubernetes Version: Major:"1", Minor:"15", GitVersion:"v1.15.10"
• Scaler(s): Prometheus

[tomkerkhove]

Closing in favor of #801