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https://issues.apache.org/jira/browse/KAFKA-9593?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aishwarya Gune updated KAFKA-9593:
----------------------------------
    Description: 
When using kafka-config script to update config, attempt to update a 
non-existing config goes through. For example - 
`./bin/kafka-configs.sh  --bootstrap-server localhost:9092 --alter --add-config 
'log.cleaner.threads.config=50' --entity-default --entity-type brokers`
The correct config name is - `log.cleaner.threads`.
Following the above command, if the correct config is to be updated it hits the 
following issue - 
```All sensitive broker config entries must be specified for --alter, missing 
entries: Set(log.cleaner.threads.config)```
One way to update this config now is to specify the incorrect config too - 
```Aishwarya-Gunes-MBP13:kafka aishwarya.gune$ ./bin/kafka-configs.sh  
--bootstrap-server localhost:9092 --alter --add-config 
'log.cleaner.threads=2,log.cleaner.threads.config=30' --entity-default 
--entity-type brokers```

  was:
When using kafka-config script to update config, attempt to update a 
non-existing config goes through. For example - 
./bin/kafka-configs.sh  --bootstrap-server localhost:9092 --alter --add-config 
'log.cleaner.threads.config=50' --entity-default --entity-type brokers
The correct config name is - `log.cleaner.threads`.
Following the above command, if the correct config is to be updated it hits the 
following issue - 
```All sensitive broker config entries must be specified for --alter, missing 
entries: Set(log.cleaner.threads.config)```
One way to update this config now is to specify the incorrect config too - 
```Aishwarya-Gunes-MBP13:kafka aishwarya.gune$ ./bin/kafka-configs.sh  
--bootstrap-server localhost:9092 --alter --add-config 
'log.cleaner.threads=2,log.cleaner.threads.config=30' --entity-default 
--entity-type brokers```


> Kafka config allows updating a nonexistent config and makes it mandatory to 
> specify the config for further config updates
> -------------------------------------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-9593
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9593
>             Project: Kafka
>          Issue Type: Bug
>            Reporter: Aishwarya Gune
>            Priority: Major
>
> When using kafka-config script to update config, attempt to update a 
> non-existing config goes through. For example - 
> `./bin/kafka-configs.sh  --bootstrap-server localhost:9092 --alter 
> --add-config 'log.cleaner.threads.config=50' --entity-default --entity-type 
> brokers`
> The correct config name is - `log.cleaner.threads`.
> Following the above command, if the correct config is to be updated it hits 
> the following issue - 
> ```All sensitive broker config entries must be specified for --alter, missing 
> entries: Set(log.cleaner.threads.config)```
> One way to update this config now is to specify the incorrect config too - 
> ```Aishwarya-Gunes-MBP13:kafka aishwarya.gune$ ./bin/kafka-configs.sh  
> --bootstrap-server localhost:9092 --alter --add-config 
> 'log.cleaner.threads=2,log.cleaner.threads.config=30' --entity-default 
> --entity-type brokers```



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