解决java连接虚拟机Hbase无反应的问题
作者:iRossini
这篇文章主要介绍了解决java连接虚拟机Hbase无反应的问题,具有很好的参考价值,希望对大家有所帮助。如有错误或未考虑完全的地方,望不吝赐教
问题说明
自己用虚拟机安装了Hbase、zookeeper,然后想用java访问。
代码如下
import java.io.IOException; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.MasterNotRunningException; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.client.Connection; import org.apache.hadoop.hbase.client.ConnectionFactory; import org.apache.hadoop.hbase.client.Get; import org.apache.hadoop.hbase.client.Result; import org.apache.hadoop.hbase.client.Table; import org.apache.hadoop.hbase.util.Bytes; public class HbaseTest { public static void main(String[] args) throws MasterNotRunningException, IOException{ String tableName = "myTest"; Configuration conf = HBaseConfiguration.create(); conf.set("hbase.master", "192.168.48.129:16010"); conf.set("hbase.zookeeper.property.clientPort", "2181"); // conf.set("hbase.zookeeper.quorum", "master"); conf.set("hbase.zookeeper.quorum", "192.168.48.129"); Connection conn = ConnectionFactory.createConnection(conf); Table table = conn.getTable(TableName.valueOf(tableName)); Get g = new Get(Bytes.toBytes("row1")); Result result = table.get(g); byte [] value = result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name")); byte[] value1 = result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age")); table.close(); System.out.println(result.toString()); System.out.println(Bytes.toString(value)); System.out.println(Bytes.toString(value1)); } }
结果一直卡在result这一样没反应。
解决方案
1.由于Hbase自带有zookeeper
可以先禁用掉自带的zookeeper。
命令:vim hbase/conf/hbase-env.sh
2.由于这里只是想测试下java连接hbae
也并没有搭建Hdoop环境,所以Hbase的hhbase-size.xml配置如下
3.再对zookeeper进行配置 zoo.cfg
4.因为是在windows环境下
用java访问虚拟机的Hbase,所以还需要以下配置
命令:vim /etc/host 添加一行,IP hostname
命令:vim /etc/sysconfig/network-scripts/ifcfg-eth0 ,修改设备名
windows中相应配置:C:\Windows\System32\drivers\etc 在HOST文件中添加IP hostname
所有的配置就到这里结束,启动zookeeper,启动Hbase
java连接Hbase测试
import java.io.IOException; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.MasterNotRunningException; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.client.Connection; import org.apache.hadoop.hbase.client.ConnectionFactory; import org.apache.hadoop.hbase.client.Get; import org.apache.hadoop.hbase.client.Result; import org.apache.hadoop.hbase.client.Table; import org.apache.hadoop.hbase.util.Bytes; public class HbaseTest { public static void main(String[] args) throws MasterNotRunningException, IOException{ String tableName = "myTest"; Configuration conf = HBaseConfiguration.create(); conf.set("hbase.master", "192.168.48.129:16010"); conf.set("hbase.zookeeper.property.clientPort", "2181"); // conf.set("hbase.zookeeper.quorum", "master"); conf.set("hbase.zookeeper.quorum", "192.168.48.129"); Connection conn = ConnectionFactory.createConnection(conf); Table table = conn.getTable(TableName.valueOf(tableName)); Get g = new Get(Bytes.toBytes("row1")); Result result = table.get(g); byte [] value = result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name")); byte[] value1 = result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age")); table.close(); System.out.println(result.toString()); System.out.println(Bytes.toString(value)); System.out.println(Bytes.toString(value1)); } }
我个人使用如上方法能够解决连接Hbase无反应的问题。
以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。