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docker, error NoResourceAvailableException..

Hello all,

Trying to use docker as a single node flink cluster.

docker run --name flink_local -p 8081:8081 -t flink local

I submited a job to the cluster using the Web UI. The job failed. I see this error message in the docker logs.

org.apache.flink.runtime.jobmanager.scheduler.NoResourceAvailableException: Could not allocate all requires slots within timeout of 300000 ms. Slots required: 2, slots allocated: 0

The Web UI, shows 0 taskmanagers and 0 task slots on the Flink dashboard.
How do I start the docker with 2 Task slots?

Appreciate any help.