Error while connecting hbase with java

[Prabakaran K]

Hi

I am getting following error while connect hbase with javacode

I got this code from site

package mySQL;

import java.io.IOException;

import org.apache.hadoop.hbase.HBaseConfiguration;

import org.apache.hadoop.hbase.HColumnDescriptor;

import org.apache.hadoop.hbase.HTableDescriptor;

import org.apache.hadoop.hbase.MasterNotRunningException;

import org.apache.hadoop.hbase.TableNotFoundException;

import org.apache.hadoop.hbase.ZooKeeperConnectionException;

import org.apache.hadoop.hbase.client.HBaseAdmin;

import org.apache.hadoop.hbase.client.HTablePool;

public class HbaseClient {

/**

* @param args

* @throws IOException 

* @throws MasterNotRunningException 

*/

public static void main(String[] args) throws MasterNotRunningException, IOException {

HBaseConfiguration conf=new HBaseConfiguration();

 conf.set("hbase.master","localhost");

 HTablePool pool=new HTablePool(conf,10);

/* _hUtil=new HUtil();

 _hUtil.setPool(pool);*/

 HBaseAdmin admin=new HBaseAdmin(conf);

 try {

   admin.disableTable("test_simple-by_photoId");

   admin.deleteTable("test_simple-by_photoId");

 }

catch (  TableNotFoundException e) {

 }

 try {

   admin.disableTable("test_simple");

   admin.deleteTable("test_simple");

 }

catch (  TableNotFoundException e) {

 }

 HTableDescriptor by_photoId_idx=new HTableDescriptor("test_simple-by_photoId");

 by_photoId_idx.addFamily(new HColumnDescriptor("__idx__"));

 by_photoId_idx.addFamily(new HColumnDescriptor("props"));

 admin.createTable(by_photoId_idx);

 HTableDescriptor test_simple=new HTableDescriptor("test_simple");

 test_simple.addFamily(new HColumnDescriptor("props"));

 admin.createTable(test_simple);  System.out.println("Done......");

}

}

Error:

log4j:WARN No appenders could be found for logger (org.apache.hadoop.hbase.HBaseConfiguration).

log4j:WARN Please initialize the log4j system properly.

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/zookeeper/KeeperException

at org.apache.hadoop.hbase.client.HConnectionManager.getConnection(HConnectionManager.java:157)

at org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:90)

at mySQL.HbaseClient.main(HbaseClient.java:28)

Caused by: java.lang.ClassNotFoundException: org.apache.zookeeper.KeeperException

at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

... 3 more

[Prabakaran K]

Add zookeeper.jar but now getting below error

log4j:WARN No appenders could be found for logger (org.apache.hadoop.hbase.HBaseConfiguration).

log4j:WARN Please initialize the log4j system properly.

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils

at org.apache.hadoop.hbase.zookeeper.ZKUtil.logRetrievedMsg(ZKUtil.java:1109)

at org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataAndWatch(ZKUtil.java:550)

at org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.start(ZooKeeperNodeTracker.java:73)

at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.setupZookeeperTrackers(HConnectionManager.java:306)

at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.<init>(HConnectionManager.java:295)

at org.apache.hadoop.hbase.client.HConnectionManager.getConnection(HConnectionManager.java:157)

at org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:90)

at mySQL.HbaseClient.main(HbaseClient.java:33)

Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.StringUtils

at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

at java.lang.ClassLoader.loadClass(ClassLoader.java:306)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

... 8 more

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[Senthil Kumar]

Hi Prabhakaran,

You are missing commons jar. My suggestion would be use maven based development or include most of the jars from <HBase>/lib folder.

Thanks

Senthil Kumar

https://www.linkedin.com/in/senthilka

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[Prabakaran K]

Thanks Senthil...

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