How to Activate Dataflow Shuffle Service through gcloud CLI - google-cloud-dataflow

Question

I am trying to activate the Dataflow Shuffle [DS] through gcloud command line interface.
I am using this command:
gcloud dataflow jobs run ${JOB_NAME_STANDARD} \
--project=${PROJECT_ID} \
--region=us-east1 \
--service-account-email=${SERVICE_ACCOUNT} \
--gcs-location=${TEMPLATE_PATH}/template \
--staging-location=${PIPELINE_FOLDER}/staging \
--parameters "experiments=[shuffle_mode=\"service\"]"
The job starts. The Dataflow UI reflects it:
However, the logs showing the error with parsing the value:
Failed to parse SDK pipeline options: json: cannot unmarshal string into Go struct
field sdkPipelineOptions.experiments of type []string
What am I doing wrong?
This question is indeed related to an existing question:
How to activate Dataflow Shuffle service?
however the original question was covering python API, while my problem is with gcloud CLI.
[DS] https://cloud.google.com/dataflow/docs/guides/deploying-a-pipeline#cloud-dataflow-shuffle
P.S. Update
I have also tried:
No luck.

Answer 1

There's currently no way (I know of) to enable shuffle_service for template.
You have two options:
a) Run a job not from template
b) create a template that already has shuffle_service enabled.
The unmarshalling issue is most likely because templates only support fixed amount of parameters and template does not support "experiments" parameter.
----UPD----
I was asked on how to create template with shuffle_service enabled.
Here are sample steps I took.
Follow WordCountTutorial to create project with pipeline definition.
Created template with following command:
mvn -Pdataflow-runner compile exec:java -Dexec.mainClass=org.apache.beam.examples.WindowedWordCount -Dexec.args="--project={project-name} --stagingLocation=gs://{staging-location} --inputFile=gs://apache-beam-samples/shakespeare/* --output=gs://{output-location} --runner=DataflowRunner --experiments=shuffle_mode=service --region=us-central1 --templateLocation=gs://{resulting-template-location}"
Note --experiments=shuffle_mode=service argument
Invoked template from UI or via command:
cloud dataflow jobs run {job-name} --project={project-name} --region=us-central1 --gcs-location=gs://{resulting-template-location}