kcat produces to same partition even with explicit -p -1 or explicit partition key

[alexbiehl]

In a bash script I am piping lines into kcat and it looks like it's producing every record to the partition 0 of my topic.

I tried

• adding an explicit -p -1 to the command line to force random distribution
• I also tried adding a message key to get a little bit of partitioning

both of the measures didn't help. What am I missing?

The command I was starting out with seemed pretty vanilla and looked kinda like this:

kcat -X security.protocol=SSL -P -b $KAFKA_BROKERS -t some-topic

Any idea what could cause this phenomenon?

[alexbiehl]

Turns out the topic had only one partition 😮‍💨