Even this is old thread updating . add  java-home/bin/keytool -genkey -alias server-alias -keyalg RSA -keypass changeit -storepass changeit -keystore keystore.jks java-home/bin/keytool -export -alias server-alias -storepass changeit -file server.cer -keystore keystore.jks This need to be configured on NiFI instance.   ... View more

This is a heap space problem. Check if your nifi cluster is big enough to process the amount of data you are consuming from Kafka. Maybe try with a smaller dataset.    If you find the answer helpful please accept this as a solution. ... View more