Frequently Asked Questions

• Q1. Not able to access storm worker log via browser

  Add the following line in host machine’s hosts file

  127.0.0.1 sandbox.hortonworks.com
  

• Q2. Not able to send data into kafka using kafka console producer:

  /usr/hdp/current/kafka-broker/bin/kafka-console-producer.sh --broker-list localhost:6667 --topic sandbox_hdfs_audit_log
  

  Apache Kafka broker are binding to host sandbox.hortonworks.com

• Q3. Cannot visit eagle service url http://localhost:9099 through the browser

  If your network is NAT, then you need to add forwarding port 9099 for eagle service, or you should check if Apache HBase is alive.

• Q4: There is no data in Kafka topic after installing log4j Kafka appender

  There are a few reasons for this: 1) check if the log4j kafka appender is installed successfully and there is no exceptions when restarting the namenode. 2) check if Apache Kafka is started. 3) If everything is ok, the final choice is to restart the namenode again.

• Q5: There is no workers in some topologies.

  Apache Storm in sandbox has only two slots (workers) to run topologies by default. If want to run more than two topologies, a user should add extra slots in the configurations and restart Storm.