Can you give us more information so that we can match the line numbers in the stack trace with actual code ?
release of hbase hadoop version If you can show snippet of related code, that would be nice. Thanks On Fri, Oct 21, 2016 at 11:16 AM, 乔彦克 <qya...@gmail.com> wrote: > Hi, all > > I use mapreduce to update HBase data, got this error just now, and > I have no idea why this happened. > > below is the error log: > > 2016-10-22 01:14:49,047 WARN [main] > org.apache.hadoop.mapred.YarnChild: Exception running child : > java.lang.RuntimeException: java.lang.NullPointerException > at org.apache.hadoop.hbase.client.RpcRetryingCaller. > callWithoutRetries(RpcRetryingCaller.java:208) > at org.apache.hadoop.hbase.client.ClientScanner.call( > ClientScanner.java:314) > at org.apache.hadoop.hbase.client.ClientScanner. > loadCache(ClientScanner.java:397) > at org.apache.hadoop.hbase.client.ClientScanner.next( > ClientScanner.java:358) > at org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl. > nextKeyValue(TableRecordReaderImpl.java:220) > at org.apache.hadoop.hbase.mapreduce.TableRecordReader. > nextKeyValue(TableRecordReader.java:151) > at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader. > nextKeyValue(MapTask.java:556) > at org.apache.hadoop.mapreduce.task.MapContextImpl. > nextKeyValue(MapContextImpl.java:80) > at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context. > nextKeyValue(WrappedMapper.java:91) > at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341) > at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163) > 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:1671) > at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158) > Caused by: java.lang.NullPointerException > at org.apache.hadoop.hbase.client.RpcRetryingCaller. > callWithoutRetries(RpcRetryingCaller.java:199) > ... 16 more > > Any reply is appreciated. > > > Best regards > > Qiao Yanke >
