sorry didn't include version CDH5 version - CDH-5.0.0-1.cdh5.0.0.p0.47
On Thu, May 8, 2014 at 5:32 PM, Geovanie Marquez <[email protected] > wrote: > Hey group, > > There is one job that scans HBase contents and is really resource > intensive using all resources available to yarn (under Resource Manager). > In my case, that is 8GB. My expectation here is that a properly configured > cluster would kill the application or degrade the application performance > but never ever take a region server down. This is intended to be a > multi-tenant environment where developers may submit jobs at will and I > would want a configuration where the cluster services are not exited in > this way because of memory. > > The simple solution here, is to change the way the job consumes resources > so that when run it is not so resource greedy. I want to understand how I > can mitigate this situation in general. > > **It FAILS with the following config:** > The RPC client has 30 handlers > write buffer of 2MiB > The RegionServer heap is 4GiB > Max Size of all memstores is 0.40 of total heap > HFile Block Cache Size is 0.40 > Low watermark for memstore flush is 0.38 > HBase Memstore size is 128MiB > > **Job still FAILS with the following config:** > Everything else the same except > The RPC client has 10 handlers > > **Job still FAILS with the following config:** > Everything else the same except > HFile Block Cache Size is 0.10 > > > When this runs I get the following error stacktrace: > # > #How do I avoid this via configuration. > # > > java.lang.OutOfMemoryError: Java heap space > at > org.apache.hadoop.hbase.ipc.RpcClient$Connection.readResponse(RpcClient.java:1100) > at > org.apache.hadoop.hbase.ipc.RpcClient$Connection.run(RpcClient.java:721) > 2014-05-08 16:23:54,705 WARN [IPC Client (1242056950) connection to > c1d001.in.wellcentive.com/10.2.4.21:60020 from hbase] > org.apache.hadoop.ipc.RpcClient: IPC Client (1242056950) connection to > c1d001.in.wellcentive.com/10.2.4.21:60020 from hbase: unexpected exception > receiving call responses > # > > ###Yes, there was an RPC timeout this is what is killing the server because > the timeout is eventually (1minute later) reached. > > # > > java.lang.OutOfMemoryError: Java heap space > at > org.apache.hadoop.hbase.ipc.RpcClient$Connection.readResponse(RpcClient.java:1100) > at > org.apache.hadoop.hbase.ipc.RpcClient$Connection.run(RpcClient.java:721) > 2014-05-08 16:23:55,319 INFO [main] > org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl: recovered from > org.apache.hadoop.hbase.DoNotRetryIOException: Failed after retry of > OutOfOrderScannerNextException: was there a rpc timeout? > at > org.apache.hadoop.hbase.client.ClientScanner.next(ClientScanner.java:384) > at > org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl.nextKeyValue(TableRecordReaderImpl.java:194) > at > org.apache.hadoop.hbase.mapreduce.TableRecordReader.nextKeyValue(TableRecordReader.java:138) > at > org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:533) > at > org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80) > at > org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91) > at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:764) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340) > at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:415) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548) > at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163) > > # > > ## Probably caused by the OOME above > > # > > Caused by: org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException: > org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException: Expected > nextCallSeq: 1 But the nextCallSeq got from client: 0; request=scanner_id: > 5612205039322936440 number_of_rows: 10000 close_scanner: false next_call_seq: > 0 > at > org.apache.hadoop.hbase.regionserver.HRegionServer.scan(HRegionServer.java:3018) > at > org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:26929) > at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2175) > at > org.apache.hadoop.hbase.ipc.RpcServer$Handler.run(RpcServer.java:1879) > >
