Hi,
If you have a large number of partitions in your topic, it can take a really
long while before you start seeing messages on the console.
So, using the partition id is the right approach. But just need to be patient
at the command-line. Out of interest, how long did you wait for the output from
console consumer ?
If you need to know the partition id, you will need to use a custom program to
compute it based on the key. (You could have a look at the murmur2 source code
on the Kafka github repository and try to create a simple command line tool to
compute the partition id using the key).
However, using --group option will only set the consumer group id of your
instance of the kafka-console-consumer.sh.
Regards,
Neeraj
On Tuesday, 13 June, 2023 at 05:26:24 pm GMT+10, Geithner, Wolfgang Dr.
<w.geith...@gsi.de> wrote:
This is a copy of a topic I posted in stackoverflow
(https://stackoverflow.com/questions/76458064/apache-kafka-consumer-consumes-messages-with-partition-option-but-not-with-g),
where I didn't get any answer yet. Searching the web did not yield any helpful
reults either. Hence, I am addressing to this mailing list:
I am running a plain Apache Kafka server (version 3.4.1) which I would like to
connect to a Telegraf consumer. The Telegraf ```[[inputs.kafka_consumer]]```
plugin has the option to consume by Kafka "group". When staring Telegraf, I get
an error message
[inputs.kafka_consumer] Error in plugin: consume: kafka server: Request was
for a consumer group that is not coordinated by this broker
Hence, I started to investigate my setup by using the Kafka console tools and
found that when executing
./kafka-console-consumer.sh --bootstrap-server myserver:9092 --topic test
--partition 0
and sending messages via ```kafka-console-consumer.sh```, these messages pop up
in the console "consumer" window as expected.
In contrast to this, when I run
./kafka-console-consumer.sh --bootstrap-server myserver:9092 --topic test
--group my-group
nothing happens in the "consumer" window. Furthermore, the command
./kafka-consumer-groups.sh --bootstrap-server myserver:9092 --list
yields nothing.
What do I have to do to cause the consumer with the "group" option to "see" the
messages produced to the topic "test"? Ultimately, how can I solve the Telegraf
error?
