Thanks Volkan for the comments and help.



It sounds like neither of the two methods mentioned above can meet 

the business scenario requirements: 

We just want the Kafka appender to discard data only when its output 

rate is lower than the log production rate.




> If you are actively using it, either consider migrating to an alternative,

> or step up as a maintainer, please.




I'm willing to make some contributions to the Kafka appender to the best of my 
ability. 

In addition, I am curious:
- if I want to support the feature where the Kafka 

appender can discard logs when the output rate is lower than the log generation 
rate, 

what specifications or rules should I follow to advance this feature?
- Is this feature reasonable in the eyes of the community's users and 
developers?




Thank you very much.




Best,

Yuepeng











At 2025-01-27 17:27:03, "Volkan Yazıcı" <vol...@yazi.ci> wrote:
>Hello Yuepeng,
>
>If it is okay to drop log events when the appender isn't keeping up, you
>can use a burst filter
><https://logging.apache.org/log4j/2.x/manual/filters.html#BurstFilter>. If
>your burst/congestion periods are temporary and you don't want to lose
>events, you can consider employing an async. appender
><https://logging.apache.org/log4j/2.x/manual/appenders/delegating.html#AsyncAppender>
>as a buffer.
>
>Note that the Kafka appender
><https://logging.apache.org/log4j/2.x/manual/appenders/message-queue.html#KafkaAppender>
>sadly
>needs some love. Due to lack of community interest and maintainer time, it
>is planned to be dropped in the next major release, i.e., Log4j 3. If you
>are actively using it, either consider migrating to an alternative, or step
>up as a maintainer, please.
>
>Kind regards.
>
>On Sun, Jan 26, 2025 at 12:09 PM Yuepeng Pan <panyuep...@apache.org> wrote:
>
>> Hi, masters..
>>
>>
>> Recently, I have enabled the Kafka appender in certain scenarios to
>> collect logs, but we encountered an issue:
>> When the log generation speed exceeds the write speed of Kafka,
>>  it negatively impacts the processing speed of core business logic because
>> the high-frequency log output is embedded within the core business logic.
>>
>>
>> May I know is there any available parameter for optimizing this issue?
>>
>>
>> Thank you~
>>
>>
>> Best,
>> Yuepeng Pan

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