If your client caching is set to a large value, you will need to do a long scan occasionally, and the rpc itself will be expensive in terms of IO. So it's worth looking at hbase.client.scanner.caching to see if it is too large. If you're scanning the whole table check you aren't churning the block cache.
The XML below looks wrong, was that copied verbatim from your site file? https://richardstartin.com > On 21 Dec 2016, at 12:02, Rajeshkumar J <rajeshkumarit8...@gmail.com> wrote: > > Hi, > > Thanks for the reply. I have properties as below > > <property> > <name>hbase.regionserver.lease.period</name> > <value>900000</value> > </property> > <property> > <name>hbase.rpc.timeout</name> > <value>900000>/value> > </property> > > > Correct me If I am wrong. > > I know hbase.regionserver.lease.period, which says how long a scanner > lives between calls to scanner.next(). > > As far as I understand when scanner.next() is called it will fetch no > of rows as in *hbase.client.scanner.caching. *When this fetching > process takes more than lease period it will close the scanner object. > so this exception occuring? > > > Thanks, > > Rajeshkumar J > > > > On Wed, Dec 21, 2016 at 5:07 PM, Richard Startin <richardstar...@outlook.com >> wrote: > >> It means your lease on a region server has expired during a call to >> resultscanner.next(). This happens on a slow call to next(). You can either >> embrace it or "fix" it by making sure hbase.rpc.timeout exceeds >> hbase.regionserver.lease.period. >> >> https://richardstartin.com >> >> On 21 Dec 2016, at 11:30, Rajeshkumar J <rajeshkumarit8...@gmail.com< >> mailto:rajeshkumarit8...@gmail.com>> wrote: >> >> Hi, >> >> I have faced below issue in our production cluster >> >> org.apache.hadoop.hbase.regionserver.LeaseException: >> org.apache.hadoop.hbase.regionserver.LeaseException: lease '166881' does >> not exist >> at org.apache.hadoop.hbase.regionserver.Leases. >> removeLease(Leases.java:221) >> at org.apache.hadoop.hbase.regionserver.Leases. >> cancelLease(Leases.java:206) >> at >> org.apache.hadoop.hbase.regionserver.RSRpcServices. >> scan(RSRpcServices.java:2491) >> at >> org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2. >> callBlockingMethod(ClientProtos.java:32205) >> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2114) >> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:101) >> at >> org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:130) >> at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:107) >> at java.lang.Thread.run(Thread.java:744) >> >> >> Can any one explain what is lease exception >> >> Thanks, >> Rajeshkumar J >>
