Java连接Hbase的项目实践
我在网上试 了很多代码,但是大部分都不能实现,Java连接Hbase,一直报一个错
java.util.concurrent.ExecutionException: org.apache.zookeeper.KeepeEeTJmWrException$NoNodeException: KeeperErrorCode = NoNode for /hbase/hbaseid
一直也不清楚为什么。后面各种尝试,最后尝试出来了,能正常连接hbase,但是也不知道为啥能出来,所以该代码可能只能解决我自己的问题,其他人的问题请谨慎参考,不保证准确与否,因为我也不知道为什么????
引入Jar,本公司使用的Hbase是2.0.2.1.7.x,所以我使用的Jar也是2.0.2版本 ,根据实际情况引入,然后还用了log4j2的日志
<?XML version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.hbase</groupId> <artifactId>hbase-operation</artifactId> <version>0.0.1</version> <properties> <maven.compiler.source>8</maven.compiler.source> <maven.compiler.target>8</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>org.apac编程客栈he.hbase</groupId> <artifactId>hbase-server</artifactId> <version>2.0.2</version> <exclusions> <exclusion> <artifactId>servlet-api</artifactId> <groupId>javax.servlet</groupId> </exclusion> <exclusion> <artifactId>slf4j-log4j12</artifactId> <groupId>org.slf4j</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.hbase</groupId> <artifactId>hbase-client</artifactId> 编程客栈 <version>2.0.2</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> </exclusion> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.22</version> </dependency> <dependency> php <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.32</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>2.17.1</version> <exclusions> <exclusion> <groupId>org.apache.logjavascriptging.log4j</groupId> <artifactId>log4j-api</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>2.17.1</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-slf4j-impl</artifactId> <version>2.17.0</version> <exclusions> <exclusion> <artifactId>log4j-api</artifactId> <groupId>org.apache.logging.log4j</groupId> </exclusion> <exclusion> <artifactId>log4j-core</artifactId> <groupId>org.apache.logging.log4j</groupId> </exclusion> <exclusion> <artifactId>slf4j-api</artifactId> <groupId>org.slf4j</groupId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-assembly-plugin</artifactId> <version>3.0.0</version> <configuration> <archive> <manifest> <mainClass>com.hbase.HbaseSearch</mainClass> </manifest> </archive> <descriptorRefs> <descriptorRef>jar-with-dependencies</descriptorRef> </descriptorRefs> </configuration> <executions> <execution> <id>make-assembly</id> <phase>package</phase> <goals> <goal>single</goal> </goals> </execution> </executions> </plugin> </plugins> </build> </project>
日志配置
<?xml version="1.0" encoding="UTF-8"?> <Configuration status="DEBUG"> <Appenders> <Console name="Console" target="SYSTEM_OUT"> <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/> </Console> </Appenders> <Loggers> <Root level="info"> <AppenderRef ref="Console"/> </Root> </Loggers> </Configuration>
实际代码
package com.hbase; import lombok.extern.slf4j.Slf4j; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.client.*; import org.apache.hadoop.hbase.util.Bytes; import java.util.List; /** * @author panlf * @date 2023/11/1 */ @Slf4j public class HbaseSearch { public static void main(String[] args) throws Exception { log.info("start111"); // 创建HBase配置对象 Configuration config = HBaseConfiguration.create(); config.set("hbase.zookeeper.quorum", "fdp-master,fdp-slave1,fdp-slave2,fdp-slave3"); // 设置ZooKeeper地址 config.set("hbase.rootdir","hdfs://fdp-master:8020/apps/hbase/data"); config.set("zookeeper.znode.parent","/hbase-unsecure"); // 创建HBase连接 Connection connection = ConnectionFactory.createConnection(config); Admin admin = connection.getAdmin(); // 获取所有表名 List<TableDescriptor> tableDescriptors = admin.listTableDescriptors(); for (TableDescriptor tableDescriptor : tableDescriptors) { System.out.println("表名: " + Bytes.toString(tableDescriptor.getTableName().getName())); } System.out.println("over"); // 关闭资源 admin.close(); connection.close(); } }
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