Understanding Conflict Management Center

Question

Can someone help me understand what the red bars on the timeline in the center of confluence mean?

Answer 1

Red bars indicate that when processing monitoring data, either absent or duplicate interceptor records were encountered. The docs describe this behavior as such:

It is also possible that messages sent by interceptors of confluent metrics are lost or duplicated. If this happens, the affected time interval is highlighted, showing the picture on the tree on the axis.

You can find the "Flow Monitoring" section in the documentation of the Control Center when you begin to get acquainted with the product. I have connected it below.

http://docs.confluent.io/current/control-center/docs/monitoring.html

Answer 2

"Red bars" means that the Control Center can calculate the number of messages and the delay, but there is uncertainty regarding the measurements.

The reason for the measurement uncertainty is that some of the information used for the determination is missing. Typically, the “end of session” markers from manufacturers or consumers are the missing information, and the reason it is missing is because the client closed the incomplete (without calling the close () method). Make sure you clear your client even if exceptions are thrown and ctrl-c gets caught.

In theory, the area of ​​uncertainty should be rather small. Just a few minutes on either side of an unclean shutdown. However, there is an error in existing versions of the Control Center, up to 3.3.0, including the "Christmas tree pattern" (our name for the red bars), to take over the entire timeline. We are working on it.