Kafka
What is Kafka?
Kafka is an open source software platform developed using Scala & Java. It is used for real-time streams of data, to collect big data, or to do real-time analysis. Used with in-memory microservices to provide durability and it can be used to feed events to CEP(Complex event streaming systems).
Port numbers used by Kafka: 9092 by default
Zoo keeper
What is zookeeper? An open source Apache project which works on a simple client-server model. Where clients are nodes(machines) that make use of the services and where servers are the nodes that provides the services.
Ports used by Zookeeper: 2181 | 2888 | 3888
Note: Kafka will not work, until zookeeper is installed under Kafka directory
It represents code exited on line number 14 from mongod.conf file
By default, mongod does not have permission to /tmp/mongod27017.sock
Steps to fix it:
2. delete the /tmp/mongod-17.lock
3. sudo systemctl restart mongod
4. Check the MongoDB status: sudo service mongod status
Now mongodb will be working
Note: Kindly create access list, while working on mongodb, or else you will be receiving warnings
