Lagom's embedded Kafka fails to start after killing Lagom process once

Question

I've played around with lagom-scala-word-count Activator template and I was forced to kill the application process. Since then embedded kafka doesn't work - this project and every new I create became unusable. I've tried:

• running sbt clean, to delete embedded Kafka data
• creating brand new project (from other activator templates)
• restarting my machine.

Despite this I can't get Lagom to work. During first launch I get following lines in log:

[warn] o.a.k.c.NetworkClient - Error while fetching metadata with correlation id 1 : {wordCount=LEADER_NOT_AVAILABLE}
[warn] o.a.k.c.NetworkClient - Error while fetching metadata with correlation id 2 : {wordCount=LEADER_NOT_AVAILABLE}
[warn] o.a.k.c.NetworkClient - Error while fetching metadata with correlation id 4 : {wordCount=LEADER_NOT_AVAILABLE}
[warn] a.k.KafkaConsumerActor - Consumer interrupted with WakeupException after timeout. Message: null. Current value of akka.kafka.consumer.wakeup-timeout is 3000 milliseconds
[warn] a.k.KafkaConsumerActor - Consumer interrupted with WakeupException after timeout. Message: null. Current value of akka.kafka.consumer.wakeup-timeout is 3000 milliseconds

Next launches result in:

[info] Starting Kafka
[info] Starting Cassandra
....Kafka Server closed unexpectedly.
....
[info] Cassandra server running at 127.0.0.1:4000

I've posted full server.log from lagom-internal-meta-project-kafka at https://gist.github.com/szymonbaranczyk/a93273537b42aafa45bf67446dd41adb.

Is it possible that some corrupted Embedded Kafka's data is stored globally on my pc and causes this?

Answer 1

For future reference, as James mentioned in comments, you have to delete the folder lagom-internal-meta-project-kafka in target/lagom-dynamic-projects. I don't know why it's not get deleted automatically.