这是我的java hbase createtable程序,如下所示: -
public class createtable
{
public static void main(String[] args) throws IOException
{
Configuration conf = HBaseConfiguration.create();
conf.set("hbase.zookeeper.quorum", "sandbox.hortonworks.com");
conf.set("hbase.zookeeper.property.clientPort", "2181");
conf.set("zookeeper.znode.parent", "/hbase-unsecure");
HBaseAdmin admin = new HBaseAdmin(conf);
HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf("people"));
tableDescriptor.addFamily(new HColumnDescriptor("personal"));
tableDescriptor.addFamily(new HColumnDescriptor("contactinfo"));
admin.createTable(tableDescriptor);
Put put = new Put(Bytes.toBytes("doe-john-m-12345");
}
在运行命令后创建程序的jar(table-0.0.1-SNAPSHOT.jar)之后 hadoop jar table-0.0.1-SNAPSHOT.jar table.createtable
我正在
Exception in thread "main" java.lang.NoClassDefFoundError:org/apachehadoop/hbase/HBaseConfiguration at
table.createtable.main(createtable.java:17)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.jav a:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.util.RunJar.run(RunJar.java:234)
at org.apache.hadoop.util.RunJar.main(RunJar.java:148) Causedby:
java.lang.ClassNotFoundException:org.apache.hadoop.hbase.HBase
Configuration
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
how do i resolve this error ??
答案 0 :(得分:1)
您的代码无法看到 hbase.jar 。尝试在 pom.xml
中添加此部分<!-- https://mvnrepository.com/artifact/org.apache.hbase/hbase -->
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase</artifactId>
<version>0.90.2</version>
</dependency>
然后运行它。
答案 1 :(得分:1)
请阅读此博客:https://my-bigdata-blog.blogspot.com/2017/08/hbase-programming-on-map-reduce-with.html
要使其发挥作用的两点
1)你的代码应该有TableMapReduceUtil.addDependencyJars(job);
2)在命令行上 - 执行命令之前执行以下操作:
导出HADOOP_CLASSPATH =你的jar路径
export HADOOP_CLASSPATH = $ HADOOP_CLASSPATH:hbase classpath
这会添加hbase库以供执行。你在maven / netbeans中添加的那个是用于编译的。
答案 2 :(得分:0)
我解决了这个问题,因为在制作胖jar时存在问题,并且在新的hbase版本jars中被弃用了许多依赖项。所以我还添加了hbase-client-1.2.6-jar和hbase-common-1.2.6 -jar外部蚀,然后建造胖罐...这解决了我的问题。