Is it normal for segments go OFFLINE if server is not that much busy , facing this issue almost in dev , Qa env. and data is getting lost due to this , only 2 or 3 segments are ONLINE and sometimes data is not coming to pinot. Checking logs for errors if any.

sounds like your servers are unhealthy, and might be restarting. Likely a resource issue. You might want to check for OOM like issues

I also faced this issue. I found that GC pauses were very high which was causing ZK disconnect.

Hi @User I checked all logs for broker , controller and servers and there are no OOM related issues , but it is clear that the those table where I can see segments are offline is skipping data like if we do 10 request every time 2,3 data is getting lost.