[jira] [Created] (KAFKA-13788) Creation of invalid dynamic config prevents further creation of valid configs

[Prateek Agarwal (Jira)]

Prateek Agarwal created KAFKA-13788:
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             Summary: Creation of invalid dynamic config prevents further 
creation of valid configs
                 Key: KAFKA-13788
                 URL: https://issues.apache.org/jira/browse/KAFKA-13788
             Project: Kafka
          Issue Type: Bug
          Components: config
    Affects Versions: 2.8.0
            Reporter: Prateek Agarwal


Kafka currently allows creating an unknown dynamic config without any errors. 
But it errors when next valid dynamic config gets created.

This can be seen locally in a cluster by creating a wrong config 
{{log.cleaner.threadzz}} which was preventing creation of the valid config 
later {{log.cleaner.threads}}.

{code}
# Invalid config 'log.cleaner.threadzz' gets created without issues
$ ./bin/kafka-configs.sh --bootstrap-server localhost:9092 --alter --add-config 
log.cleaner.threadzz=2 --entity-type brokers --entity-default 2>1
Completed updating default config for brokers in the cluster.
{code}

Now when a valid config is added, {{kafka-configs.sh}} errors out:
{code}
$ ./bin/kafka-configs.sh --bootstrap-server localhost:9092 --alter --add-config 
log.cleaner.threads=2 --entity-type brokers --entity-default
All sensitive broker config entries must be specified for --alter, missing 
entries: Set(log.cleaner.threadzz)
{code}

To fix this, one needs to first delete the incorrect config:
{code:java}
$ ./bin/kafka-configs.sh --bootstrap-server localhost:9092 --alter 
--delete-config log.cleaner.threadzz --entity-type brokers --entity-default
 {code}

But ideally, the invalid config should error out so that creation of the valid 
config doesn't get prevented.



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