Got user-level KeeperException when processing

Question

I know this has been asked before, so please forgive me for asking again, but none of the solutions pointed to by that thread worked for me.

I\'m trying to setup Kafka <

Answer 1

The message you see is not an error yet. It is a potential exception raised by Zookeeper that original object making a request has to handle.

When you start a fresh Kafka, it gets a bunch of NoNode messages. It's normal because some paths don't exist yet. At the same time, you get also NodeExists messages as the path exists already.

Example: Error:KeeperErrorCode = NoNode for /config/topics/test It's because Kafka sends a request to Zookeeper for this path. But it doesn't exist. That's OK, because you are trying to create it. So, you see "INFO" from Zookeeper but no error from Kafka. Once Kafka gets this message, it tries to create your topic. To do so, it needs to access a path in Zookeeper for topics. So, it sends a request and gets an error NodeExists for /config/topics. Again, it's normal and Kafka ignores the message.

Long story short, these are all non-issue messages and you should skip them. If it bothers you, change logging configuration of Zookeeper (it's not recommended though).