Background

Conduktor Desktop gives the option of being able to run a Kafka cluster directly from it, to be able to carry out some ad-hoc testing, or for those newer to Kafka to get started.

This can be accomplished by following the screenshots below.

On this window, click on "Start local Kafka cluster".

Then select your options.

And you just have to wait for a few seconds.

The error

However, what happens if you get an error during this process?

You may have an error that reads something like this:

The download failed for obscure reasons: sttp.client3.SttpClientException$ReadException: Exception when sending request: GET https://releases.conduktor.io/kafka_oss_3-1-0 io.conduktor.jumpstart.domain.JumpStartError$IOError: sttp.client3.SttpClientException$ReadException: Exception when sending request: GET https://releases.conduktor.io/kafka_oss_3-1-0

or

Zookeeper failed to start (timeout). Please try again. io.conduktor.jumpstart.domain.JumpStartError$ProcessStartingTimeout at io.conduktor.jumpstart.ZookeeperLiveProcess.$anonfun$waitZkReady$1(ZookeeperProcess.scala:116) at zio.ZIO$.$anonfun$fail$1(ZIO.scala:2898) at zio.internal.FiberContext.evaluateNow(FiberContext.scala:411) at zio.internal.FiberContext.$anonfun$evaluateLater$1(FiberContext.scala:785) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.base/java.lang.Thread.run(Unknown Source)```

Explanation

For Conduktor's Jumpstart feature to work it needs access to download a Kafka binary from https://conduktor-jumpstart.s3.fr-par.scw.cloud/kafka-3.1/oss/kafka_2.13-3.1.0.tgz where it is stored.

This is stored in S3 which allows you to download the Kafka binary version chosen directly to your own machine.

What can happen and what we sometimes see happening is there may be a problem here downloading that file due to a proxy or VPN that you may be using on your network or a certificate that may be missing.

Steps to troubleshoot

Try to download https://conduktor-jumpstart.s3.fr-par.scw.cloud/kafka-3.1/oss/kafka_2.13-3.1.0.tgz and see if you are experiencing the same error.

Let us know if this works or not. If it does work there may be another issue here and we can troubleshoot further.

If it doesn't work, it is likely you'll need to add proxy settings and/or a certificate to Conduktor Desktop, please see further information on this here.

If you are still having issues reach out to us at support@conduktor.io or the support thread you started for this issue.