Hi, We are using hbase-0.94.1 Recently we observed that Requests per second in HBase increased to 2 to 3 fold.We have 15 regionServers & 20 data nodes in our cluster.
Thanks,Sandeep. > CC: [email protected] > From: [email protected] > Subject: Re: Frequent scan time outs in multiple region servers in same time > intervals > Date: Thu, 14 Nov 2013 06:43:17 -0800 > To: [email protected] > > Which version of HBase are you using ? > > If this problem only started to appear recently, was there noticeable change > in load on the cluster ? > > Thanks > > On Nov 14, 2013, at 3:08 AM, Sandeep L <[email protected]> wrote: > > > Its not a Scan for Map/Reduce. > > Internally we are using HBase for one of our application where our > > application scans data from HBase tables and we use the scan results.Due to > > regular scan time outs our service getting interrupted. > > > > > > Thanks,Sandeep. > > > >> Date: Thu, 14 Nov 2013 18:54:28 +0800 > >> Subject: Re: Frequent scan time outs in multiple region servers in same > >> time intervals > >> From: [email protected] > >> To: [email protected] > >> > >> Is it a Scan for Map/Reduce? Or it's only a regular scan in which case > >> maybe you could consider to set the start and end position of your scan to > >> limit the operation. > >> > >> Thanks > >> Ramon > >> > >> > >> On Thu, Nov 14, 2013 at 6:23 PM, Sandeep L > >> <[email protected]>wrote: > >> > >>> Hi, > >>> In recent times we are seeing frequent scan time outs in multiple region > >>> servers of our production cluster. Due to this our HBase cluster is not > >>> responding for 5 to 10 minutes for any queries & that causing huge problem > >>> for us. > >>> We are getting following error in multiple region servers almost in same > >>> time intervals > >>> 2013-11-14 00:16:30,178 INFO > >>> org.apache.hadoop.hbase.regionserver.HRegionServer: Scanner > >>> -8978491571406751432 lease expired on region > >>> TableName,news,1383881528749.1e3f228e7a7a5a13d117af309f252c6c > >>> This error is occurring on multiple tables. > >>> Can suggest us what could be the cause and how to resolve the issue. > >>> > >>> Thanks,Sandeep. > >
