when I am trying to start kafka with the following command : `bin/kafka-server-start.sh config/server.properties` I am getting this error every time Cannot open file /opt/kafka_2.11-1.1.0/bin/../logs/kafkaServer-gc.log due to Permission denied. how to fix this ... ... View more

When trying to use kafka connect using following command : bin /connect-standalone .sh config /connect-standalone .properties config /connect-file-source .properties config /connect-file-sink .properties It throws a error as `WARN FAILED http_8083@773e2eb5{HTTP/1.1}{0.0.0.0:8083}: java.net.BindException: Address already in use (org.eclipse.jetty.util.component.AbstractLifeCycle:212)` and finally ends with the line `INFO Kafka Connect stopped` How can I change my Kafka-Connect port from 8083 to other port ? ... View more

Kafka uses Producer/Consumer concept whime MQTT uses Subscribe/Publish concept ...so How Kafka is different from MQTT ? Can Kafka handle more works than MQTT with its features ? ... View more

I have installed Nifi-1.6.0 and when I fire the command `./nifi.sh start` in terminal, it is showing `Exception in thread "main" java.io.IOException: /home/nifi-1.6.0/run directory does not have read/write privilege `. Although on browser GUI, Nifi is coming well on `localhost:8080/nifi `. ... View more