Regards, ch. Which version of HBase are you using? HBase´s development group have worked very hard in Scans improvements
http://www.slideshare.net/cloudera/hbase-consistency-and-performance-final<http://es.slideshare.net/cloudera/hbase-consistency-and-performance-final> http://www.slideshare.net/cloudera/6-real-time-analytics-with-h-base-alex-baranau-sematext-final-3-updated-last-minute<http://es.slideshare.net/cloudera/6-real-time-analytics-with-h-base-alex-baranau-sematext-final-3-updated-last-minute> http://www.slideshare.net/cloudera/3-learning-h-base-internals-lars-hofhansl-salesforce-final<http://es.slideshare.net/cloudera/3-learning-h-base-internals-lars-hofhansl-salesforce-final> ---------- Forwarded message ---------- From: ch huang <[email protected]> Date: 2013/8/6 Subject: Re: scan very slow in hbase To: [email protected] i find the error is because i stop the running java code,i have not found why the scan is so slow On Tue, Aug 6, 2013 at 10:38 PM, Stack <[email protected]> wrote: > I would suggest you search the mail archives before posting first (you will > usually get your answer faster if you go this route). > > The below has been answered in the recent past. See > http://search-hadoop.com/m/5tk8QnhFqw > > Thanks, > St.Ack > > > On Tue, Aug 6, 2013 at 12:39 AM, ch huang <[email protected]> wrote: > > > my workmate tell me hbase is very slow for scan something ,i check the > > region server find the following information,anyone can help? > > > > > > 13/08/06 15:30:34 WARN ipc.HBaseServer: IPC Server listener on 60020: > > readAndProcess threw exception java.io.IOException: Connection reset by > > peer. Count of bytes read: 0 > > java.io.IOException: Connection reset by peer > > at sun.nio.ch.FileDispatcher.read0(Native Method) > > at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:21) > > at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:198) > > at sun.nio.ch.IOUtil.read(IOUtil.java:171) > > at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:245) > > at > > > org.apache.hadoop.hbase.ipc.HBaseServer.channelRead(HBaseServer.java:1796) > > at > > > > > org.apache.hadoop.hbase.ipc.HBaseServer$Connection.readAndProcess(HBaseServer.java:1179) > > at > > > > > org.apache.hadoop.hbase.ipc.HBaseServer$Listener.doRead(HBaseServer.java:748) > > at > > > > > org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.doRunLoop(HBaseServer.java:539) > > at > > > > > org.apache.hadoop.hbase.ipc.HBaseServer$Listener$Reader.run(HBaseServer.java:514) > > at > > > > > java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) > > at > > > > > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) > > at java.lang.Thread.run(Thread.java:662) > > 13/08/06 15:30:34 ERROR regionserver.HRegionServer: > > org.apache.hadoop.hbase.ipc.CallerDisconnectedException: Aborting call > > next(1916648340315433886, 1), rpc version=1, client version=29, > > methodsFingerPrint=-1368823753 from 192.168.2.209:1150 after 8504 ms, > > since > > caller disconnected > > at > > > > > org.apache.hadoop.hbase.ipc.HBaseServer$Call.throwExceptionIfCallerDisconnected(HBaseServer.java:436) > > at > > > > > org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextInternal(HRegion.java:3856) > > at > > > > > org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:3776) > > at > > > > > org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:3768) > > at > > > > > org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:2513) > > at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source) > > at > > > > > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > > at java.lang.reflect.Method.invoke(Method.java:597) > > at > > > > > org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:320) > > at > > > org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1426) > > > -- Marcos Ortiz Valmaseda Product Manager at PDVSA http://about.me/marcosortiz
