正在获取Hbase异常无区域传递

Question

这是我的映射器代码

public void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
		
		
		System.out.println("Value in Mapper"+value.toString());
		String[] values = value.toString().split(",");
         byte[] row = Bytes.toBytes(values[0]);
         ImmutableBytesWritable k = new ImmutableBytesWritable(row);
         KeyValue kvProtocol = new KeyValue(row, "PROTOCOLID".getBytes(), "PROTOCOLID".getBytes(), values[1]
                         .getBytes());
         context.write(k, kvProtocol);
}

这是我的作业配置

public class JobDriver extends Configured implements Tool{

	public static void main(String[] args) throws Exception {
		// TODO Auto-generated method stub
		ToolRunner.run(new JobDriver(), args);
		System.exit(0);

	}

	@Override
	public int run(String[] arg0) throws Exception {
		// TODO Auto-generated method stub
		
		// HBase Configuration
		System.out.println("**********Starting Hbase*************");
				Configuration conf = HBaseConfiguration.create();
                Job job = new Job(conf, "TestHFileToHBase");
                job.setJarByClass(JobDriver.class);
                job.setOutputKeyClass(ImmutableBytesWritable.class);
                job.setOutputValueClass(KeyValue.class);
                job.setMapperClass(LoadMapper.class);
                job.setOutputFormatClass(HFileOutputFormat2.class);                
                HTable table = new HTable(conf, "kiran");
                FileInputFormat.addInputPath(job, new Path("hdfs://192.168.61.62:9001/sampledata.csv"));
                FileOutputFormat.setOutputPath(job, new Path("hdfs://192.168.61.62:9001/deletions_6.csv"));
                HFileOutputFormat2.configureIncrementalLoad(job, table);
                //System.exit(job.waitForCompletion(true) ? 0 : 1);
				return job.waitForCompletion(true) ? 0 : 1;
	}
}

有谁能帮我解决一下这个例外。

Answer 1

您必须先创建表。您可以使用下面的代码来完成

//Create table and do pre-split
HTableDescriptor descriptor = new HTableDescriptor(
Bytes.toBytes(tableName)
);

descriptor.addFamily(
new HColumnDescriptor(Constants.COLUMN_FAMILY_NAME)
);

HBaseAdmin admin = new HBaseAdmin(config);

byte[] startKey = new byte[16];
Arrays.fill(startKey, (byte) 0);

byte[] endKey = new byte[16];
Arrays.fill(endKey, (byte)255);

admin.createTable(descriptor, startKey, endKey, REGIONS_COUNT);
admin.close();

或者直接从hbase shell使用以下命令：

create 'kiran', 'colfam1'

导致异常的原因是startkeys列表为空：第306行