Got it. It is because i should use the full path of java cmd( on my site it is /usr/java/default/bin/java). If just us java, it is actually point to /usr/bin/java.
Thanks, Lei [email protected] From: Ted Yu Date: 2014-01-16 13:32 To: [email protected] Subject: Re: org.apache.hadoop.hbase.KeyValue not found in gnu.gcj.runtime.SystemClassLoader Which version of HBase are you using ? Can you tell us how you launched your program ? Cheers On Wed, Jan 15, 2014 at 6:48 PM, [email protected] <[email protected]> wrote: > > Hi, > > I write a simple java class to query the rowkey of a hase table. It > compile successfully but meet errors when running it. > > Exception in thread "main" java.lang.NoClassDefFoundError: HBaseT > at java.lang.Class.initializeClass(libgcj.so.10) > Caused by: java.lang.ClassNotFoundException: > org.apache.hadoop.hbase.KeyValue not found in > gnu.gcj.runtime.SystemClassLoader{urls=[file:./], > parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}} > at java.net.URLClassLoader.findClass(libgcj.so.10) > at java.lang.ClassLoader.loadClass(libgcj.so.10) > at java.lang.ClassLoader.loadClass(libgcj.so.10) > at java.lang.Class.initializeClass(libgcj.so.10) > > Following is my java code: > > public class HBaseT { > public static Configuration configuration; > static { > configuration = HBaseConfiguration.create(); > } > public static void main(String[] args) { > queryByRowKey("userdigest", "-10000007542109572047"); > } > public static void queryByRowKey(String tableName, String keyName){ > HTablePool pool = new HTablePool(configuration, 1000); > HTableInterface table = (HTableInterface) pool.getTable(tableName); > try{ > Get get = new Get(Bytes.toBytes(keyName)); > get.addFamily(Bytes.toBytes("cf")); > Result r = table.get(get); > System.out.println(r.getRow()); > for(KeyValue kv:r.raw()){ > System.out.print(new String(kv.getKey())); > > System.out.println(new String(kv.getValue())); > } > > }catch(IOException e){ > e.printStackTrace(); > } > } > } > > Any insights on this? > > Thanks, > Lei > > > > [email protected]
