我想创建一个Java API来访问HBase DB，但是在我的项目中我总是遇到这个错误。
15/12/14 20:34:22 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=192.168.34.184:2181,192.168.34.173:2181 sessionTimeout=90000 watcher=hconnection-0xa80e050x0, quorum=192.168.34.184:2181,192.168.34.173:2181, baseZNode=/hbase
15/12/14 20:34:22 INFO zookeeper.ClientCnxn: Opening socket connection to server /192.168.34.184:2181
java.io.IOException: java.lang.reflect.InvocationTargetException
at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:240)
at org.apache.hadoop.hbase.client.ConnectionManager.createConnection(ConnectionManager.java:420)
at org.apache.hadoop.hbase.client.ConnectionManager.createConnection(ConnectionManager.java:413)
at org.apache.hadoop.hbase.client.ConnectionManager.getConnectionInternal(ConnectionManager.java:291)
at org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:222)
at api.ClientOperations.creatTable(ClientOperations.java:69)
at api.ClientOperations.main(ClientOperations.java:125)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:238)
... 6 more
Caused by: java.lang.NoClassDefFoundError: org/apache/htrace/Trace
at org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper.exists(RecoverableZooKeeper.java:217)
at org.apache.hadoop.hbase.zookeeper.ZKUtil.checkExists(ZKUtil.java:541)
at org.apache.hadoop.hbase.zookeeper.ZKClusterId.readClusterIdZNode(ZKClusterId.java:65)
at org.apache.hadoop.hbase.client.ZooKeeperRegistry.getClusterId(ZooKeeperRegistry.java:105)
at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.retrieveClusterId(ConnectionManager.java:879)
at org.apache.hadoop.hbase.client.ConnectionManager$HConnectionImplementation.<init>(ConnectionManager.java:635)
... 11 more
Caused by: java.lang.ClassNotFoundException: org.apache.htrace.Trace
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
但是我在项目中添加了HTrace jar
HBase版本:1.1.2
Hadoop版本:2.6.0
最佳答案
您需要向项目中添加正确的jar文件，将htrace-core-3.1.0 jar文件添加至项目类路径，然后运行它。 htrace-core
<dependency>
<groupId>org.apache.htrace</groupId>
<artifactId>htrace-core</artifactId>
<version>3.1.0-incubating</version>
</dependency>