Jake Robb created KAFKA-3132:
--------------------------------
Summary: Protocols in "listeners" property should not be
case-sensitive
Key: KAFKA-3132
URL: https://issues.apache.org/jira/browse/KAFKA-3132
Project: Kafka
Issue Type: Bug
Components: config
Affects Versions: 0.9.0.0
Reporter: Jake Robb
Priority: Minor
I configured my Kafka brokers as follows:
{{listeners=plaintext://kafka01:9092,ssl://kafka01:9093}}
With this config, my Kafka brokers start, print out all of the config
properties, and exit quietly. No errors, nothing in the log. No indication of a
problem whatsoever, let alone the nature of said problem.
Then, I changed my config as follows:
{{listeners=PLAINTEXT://kafka01:9092,SSL://kafka01:9093}}
Now they start and run just fine.
Per [RFC-3986|https://tools.ietf.org/html/rfc3986#section-6.2.2.1]:
{quote}
When a URI uses components of the generic syntax, the component
syntax equivalence rules always apply; namely, that the scheme and
host are case-insensitive and therefore should be normalized to
lowercase. For example, the URI <HTTP://www.EXAMPLE.com/> is
equivalent to <http://www.example.com/>.
{quote}
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