serverless warm up plugin concurrent execution of warmup functions - aws-lambda

Question

I got the serverless-plugin-warmup 4.2.0-rc.1 working fine with serverless version 1.36.2
But it only executes with one single warmup call instead of the configured five.
Is there any problem in my serverless.yml config?
It is also strange that I have to add 'warmup: true' to the function section to get the function warmed up. According to the docs on https://github.com/FidelLimited/serverless-plugin-warmup the config at custom section should be enough.
plugins:
- serverless-prune-plugin
- serverless-plugin-warmup
custom:
warmup:
enabled: true
concurrency: 5
prewarm: true
schedule: rate(2 minutes)
source: { "type": "keepLambdaWarm" }
timeout: 60
functions:
myFunction:
name: ${self:service}-${opt:stage}-${opt:version}
handler: myHandler
environment:
FUNCTION_NAME: myFunction
warmup: true
in AWS Cloud Watch I only see one execution every 2 minutes. I would expect to see 5 executions every 2 minutes, or do I misunderstand something here?
EDIT:
Now using the master branch concurrency works but now the context that is deliverd to the function which should be warmed is broken: Using Spring Cloud Functions => "Error parsing Client Context as JSON"
Looking at the JS of the generated warmup function the delivered source looks not ok =>
const functions = [{"name":"myFunction","config":{"enabled":true,"source":"\"\\\"{\\\\\\\"source\\\\\\\":\\\\\\\"serverless-plugin-warmup\\\\\\\"}\\\"\"","concurrency":3}}];
Config is:
custom:
warmup:
enabled: true
concurrency: 3
prewarm: true
schedule: rate(5 minutes)
timeout: 60

Answer 1

Added Property sourceRaw: true to warmup config which generates a clean source in the Function JS.
const functions = [{"name":"myFunctionName","config":{"enabled":true,"source":"{\"type\":\"keepLambdaWarm\"}","concurrency":3}}];
Config:
custom:
warmup:
enabled: true
concurrency: 3
prewarm: true
schedule: rate(5 minutes)
source: { "type": "keepLambdaWarm" }
sourceRaw: true
timeout: 60