Spark structured streaming : could not bind on a random free port

19/09/06 11:07:48 WARN util.Utils: Service 'sparkDriver' could not bind on a random free port. You may check whether configuring an appropriate binding address.
19/09/06 11:07:48 WARN util.Utils: Service 'sparkDriver' could not bind on a random free port. You may check whether configuring an appropriate binding address.
19/09/06 11:07:48 WARN util.Utils: Service 'sparkDriver' could not bind on a random free port. You may check whether configuring an appropriate binding address.
19/09/06 11:07:48 WARN util.Utils: Service 'sparkDriver' could not bind on a random free port. You may check whether configuring an appropriate binding address.
19/09/06 11:07:48 WARN util.Utils: Service 'sparkDriver' could not bind on a random free port. You may check whether co

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