The exception means an attempt is made to invoke or complete an I/O operation upon channel that is closed.
The ip's in log snippets were different. Have you checked server logs on those machines around corresponding time to see if the region servers were operating correctly ? Cheers On Fri, Jun 13, 2014 at 6:26 AM, sunweiwei <[email protected]> wrote: > Hi > > I'm using hbase0.96. When I start hamster , it's ok. After a little > while, I saw these in logs. > > > > 2014-06-13 18:10:15,073 WARN [RpcServer.handler=48,port=60000] > ipc.RpcServer: RpcServer.respondercallId: 206739 service: > RegionServerStatusService methodName: RegionServerReport size: 79.5 K > connection: 132.228.248.64:44466: output error > > 2014-06-13 18:10:15,075 WARN [RpcServer.handler=48,port=60000] > ipc.RpcServer: RpcServer.handler=48,port=60000: caught a > ClosedChannelException, this means that the server was processing a request > but the client went away. The error message was: null > > 2014-06-13 18:10:15,075 WARN [RpcServer.handler=23,port=60000] > ipc.RpcServer: RpcServer.respondercallId: 205982 service: > RegionServerStatusService methodName: RegionServerReport size: 79.0 K > connection: 132.228.248.65:53771: output error > > 2014-06-13 18:10:15,076 WARN [RpcServer.handler=23,port=60000] > ipc.RpcServer: RpcServer.handler=23,port=60000: caught a > ClosedChannelException, this means that the server was processing a request > but the client went away. The error message was: null > > 2014-06-13 18:10:21,692 WARN [RpcServer.handler=57,port=60000] > ipc.RpcServer: RpcServer.respondercallId: 197757 service: > RegionServerStatusService methodName: RegionServerReport size: 80.1 K > connection: 132.228.248.71:57394: output error > > 2014-06-13 18:10:21,694 WARN [RpcServer.handler=57,port=60000] > ipc.RpcServer: RpcServer.handler=57,port=60000: caught a > ClosedChannelException, this means that the server was processing a request > but the client went away. The error message was: null > > 2014-06-13 18:10:21,695 WARN [RpcServer.handler=59,port=60000] > ipc.RpcServer: RpcServer.respondercallId: 206126 service: > RegionServerStatusService methodName: RegionServerReport size: 79.8 K > connection: 132.228.248.85:55994: output error > > 2014-06-13 18:10:21,696 WARN [RpcServer.handler=59,port=60000] > ipc.RpcServer: RpcServer.handler=59,port=60000: caught a > ClosedChannelException, this means that the server was processing a request > but the client went away. The error message was: null > > > > > > I'm not sure, It seems like network problem. But ping is ok. > > Maybe This causes some master problem? > > > > > > Thanks. > >
