Openwhisk: increase number of concurrent requests - serverless

Question

I have a distributed Openwhisk setup, and when I try to execute more than 30 requests with one user at once, I get the following error:
error: Unable to invoke action 'prime-number': Too many concurrent
requests in flight (count: 30, allowed: 30)
Any idea how I could increase this number?

Answer 1

If you are using ansible method for deploying OpenWhisk, you can deploy with the following ansible-playbook environment variables override
-e limit_invocations_per_minute=999999 -e limit_invocations_concurrent=999999
If you are doing other type of deployment, the controller container needs to be deploy with the corresponding environment variables set to override any of these related values.
"LIMITS_ACTIONS_INVOKES_PERMINUTE": "{{ limits.invocationsPerMinute }}"
"LIMITS_ACTIONS_INVOKES_CONCURRENT": "{{ limits.concurrentInvocations }}"
"LIMITS_TRIGGERS_FIRES_PERMINUTE": "{{ limits.firesPerMinute }}"
"LIMITS_ACTIONS_SEQUENCE_MAXLENGTH": "{{ limits.sequenceMaxLength }}"

Answer 2

Adding to #csantanapr answer, you can add them to openwhisk.yml playbook.
ansible-playbook -i environments/<environment> -e limit_invocations_per_minute=999999 -e limit_invocations_concurrent=999999 openwhisk.yml

Answer 3

If you are using the non-ansible method to run openwhisk, you can refer to the issue here. You can also refer to this.
You can modify the file core/standalone/src/main/resources/standalone.conf. If you look at this part:
config {
controller-instances = 1
limits-actions-sequence-maxLength = 50
limits-triggers-fires-perMinute = 60
limits-actions-invokes-perMinute = 60
limits-actions-invokes-concurrent = 30
}
you can modify the value of limits-actions-invokes-concurrent and any of the other limits.
Then, when you run openwhisk, you need to supply the file through the -c parameter, through the --args parameter. Like so:
sudo ./gradlew core:standalone:bootRun --args='-c /path/to/openwhisk/core/standalone/src/main/resources/standalone.conf'
That's it.
You can also "build then run", like so:
sudo ./gradlew :core:standalone:build
sudo java -jar ./bin/openwhisk-standalone.jar -c /path/to/openwhisk/core/standalone/src/main/resources/standalone.conf