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
