Matthew de Detrich created KAFKA-13299:
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Summary: Accept listeners that have the same port but use IPv4 vs
IPv6
Key: KAFKA-13299
URL: https://issues.apache.org/jira/browse/KAFKA-13299
Project: Kafka
Issue Type: Improvement
Reporter: Matthew de Detrich
Currently we are going through a process where we want to migrate Kafka brokers
from IPv4 to IPv6. The simplest way for us to do this would be to allow Kafka
to have 2 listeners of the same port however one listener has an IPv4 address
allocated and another listener has an IPv6 address allocated.
Currently this is not possible in Kafka because it validates that all of the
listeners have a unique port. With some rudimentary testing if this validation
is removed (so we are able to have 2 listeners of the same port but with
different IP versions) there doesn't seem to be any immediate problems, the
kafka clusters works without any problems.
Is there some fundamental reason behind this limitation of having unique ports?
Consequently would there be any problems in loosening this limitation (i.e.
duplicate ports are allowed if the IP versions are different) or just
altogether removing the restriction
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