I would be -1 a requirement for MR for something core to HBase.
> On Sep 22, 2016, at 1:50 PM, Matteo Bertozzi <mberto...@apache.org> wrote: > > What's the latest opinion around running MR jobs from hbase (Master or RS)? > > I remember in the past that there was discussion about not having MR has > direct dependency of hbase. > > I think some of discussion where around MOB that had a MR job to compact, > that later was transformed in a non-MR job to be merged, I think we had a > similar discussion for log split/replay. > > the latest is the new Backup feature (HBASE-7912), that runs a MR job from > the master to copy data or restore data. > (backup is also "not really core" as in.. if you don't use backup you'll > not end up running MR jobs, but this was probably true for MOB as in "if > you don't enable MOB you don't need MR") > > any thoughts? do we a rule that says "we don't want to have hbase run MR > jobs, only tool started manually by the user can do that". or can we start > adding MR calls around without problems?