Have you enabled short circuit read ? Cheers
On Wed, May 13, 2015 at 9:37 AM, rahul malviya <[email protected]> wrote: > Hi, > > I have recently started running MR on hbase snapshots but when the MR is > running there is pretty high CPU usage on datanodes and I start seeing IO > wait message in datanode logs and as soon I kill the MR on Snapshot > everything come back to normal. > > What could be causing this ? > > I am running cdh5.2.0 distribution. > > Thanks, > Rahul >
