Today i try to make some denormalization in my hbase, so i run scaner on one table with day-user counters and ICV to table with week-user,month-user and global-user counters and after about 2 hours program(written in python) raise an exception in scanner because scanner expires, main problem was that hbase running very slow when program making ICV, one region server using 100%, but nothing was putting in logs, any splits, compactions etc..
Do you have any ideas what can cause this? Thank you! S.
