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java.lang.NullPointerException: 	at org.apache.hadoop.hbase.protobuf.generated.CellProtos$Cell$Builder.setCellType(CellProtos.java:1050)	at org.apache.hadoop.hbase.protobuf.ProtobufUtil.toCell(ProtobufUtil.java:2531)	at org.apache.hadoop.hbase.protobuf.ProtobufUtil.toResult(ProtobufUtil.java:1303)	at org.apache.hadoop.hbase.mapreduce.ResultSerialization$ResultSerializer.serialize(ResultSerialization.java:155)	at org.apache.hadoop.hbase.mapreduce.ResultSerialization$ResultSerializer.serialize(ResultSerialization.java:140)	at org.apache.hadoop.io.SequenceFile$BlockCompressWriter.append(SequenceFile.java:1591)	at org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat$1.write(SequenceFileOutputFormat.java:83)	at org.apache.hadoop.mapred.MapTask$NewDirectOutputCollector.write(MapTask.java:658)	at org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)	at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)	at org.apache.hadoop.hbase.mapreduce.IdentityTableMapper.map(IdentityTableMapper.java:66)	at org.apache.hadoop.hbase.mapreduce.IdentityTableMapper.map(IdentityTableMapper.java:33)	at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)	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:164)	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:1693)	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)