Hmm. I still have a lot of UnknowScannerException while testing. hbase.regionserver.lease.period is a 5 minutes.
I would like to know the technical reason. Comment? /Edward On Wed, Dec 10, 2008 at 2:57 PM, Michael Stack <[email protected]> wrote: > Edward J. Yoon wrote: >> >> To change hbase.regionserver.lease.period, Should I restart hbase cluster? >> > > Edward: Yes, unfortunately (should make it so you don't have to). > > David: Please upgrade to hbase 0.18.1 for other reasons than > hbase.regionserver.lease.period > > (and hadoop 0.18.2). You do not need to upgrade hadoop to run hbase 0.18.1 > (or viceversa). If lease period is all you want to change (HBASE-821), you > don't need to upgrade; just make the change in your configuration (as J-D > says) and copy it around your cluster. > > St.Ack > > > > >> On Sat, Nov 22, 2008 at 1:33 AM, Jean-Daniel Cryans <[email protected]> >> wrote: >> >>> >>> David, >>> >>> You should indeed increase your hbase.regionserver.lease.period to at >>> least >>> 2 minutes. >>> >>> J-D >>> >>> On Fri, Nov 21, 2008 at 4:55 AM, David Alves >>> <[email protected]>wrote: >>> >>> >>>> >>>> Hi >>>> >>>> I've seen this issue a lot in the mailing list, but I still have a >>>> doubt. >>>> My map tasks keep failing with unknownscannerexception (2 map >>>> tasks >>>> on same node over a 3 node cluster with 4Gb mem, scanning almost 40 GBs >>>> of >>>> data, running hadoop 0.18.0, and hbase 0.18.0), this happened in the >>>> past, >>>> but as it passed 50% of the times rarely a M/R task completely failed, >>>> as >>>> the data increased the USE now completely prevents the maps from running >>>> to >>>> completion. I'm only scanning the table, there are no inserts at the >>>> same >>>> time. >>>> I've previouly seen mentioned a lease period I could increase. Is >>>> this the "hbase.regionserver.lease.period" property? Should I upgrade to >>>> hbase 0.18.1, and if so must I also update hadoop? >>>> >>>> Regards >>>> David Alves >>>> >>>> >>>> >>>> >> >> >> >> > > -- Best Regards, Edward J. Yoon @ NHN, corp. [email protected] http://blog.udanax.org
