my dremio version is 19.0.0
I have build a reflection on certain parent dataset and it works properly in the past, but recently keep showing the below error:
AttemptManager 172.xx.xx.xx no longer active. Cancelling fragment 1c7beacc-acf3-acc6-5cb8-ffdbf3192c00:1:0
(seems the master node is not work but i find the memory usage is not quite pack, and the parent reflection was matched and ready for building the reflection)
many thanks in advance!!