When trying to access MongoDB database collection data using command such as show collections on one of the secondary member of the replica set, error message such as not master and slaveOk=false occurs. Following screenshot represents the same:
Figure 1. MongoDB – SlaveOk Error Message
Following command when executed on secondaries resolves the above shown error:
rs.slaveOk();
I have been recently working in the area of Data analytics including Data Science and Machine Learning / Deep Learning. I am also passionate about different technologies including programming languages such as Java/JEE, Javascript, Python, R, Julia, etc, and technologies such as Blockchain, mobile computing, cloud-native technologies, application security, cloud computing platforms, big data, etc. I would love to connect with you on Linkedin.
Check out my latest book titled as First Principles Thinking: Building winning products using first principles thinking.
Check out my latest book titled as First Principles Thinking: Building winning products using first principles thinking.
Latest posts by Ajitesh Kumar (see all)
- Large Language Models (LLMs): Four Critical Modeling Stages - August 4, 2025
- Agentic Workflow Design Patterns Explained with Examples - August 3, 2025
- What is Data Strategy? - August 2, 2025
I found it very helpful. However the differences are not too understandable for me