HBase Java API HTrace 错误答案

【问题标题】：HBase Java API HTrace errorHBase Java API HTrace 错误
【发布时间】：2015-12-14 18:43:22
【问题描述】：

我想创建一个 Java API 来访问 HBase DB，但我的项目中总是遇到这个错误；

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)

但是我在我的项目中添加了 HTrace jar

HBase 版本：1.1.2

Hadoop 版本：2.6.0

【问题讨论】：

标签： java hadoop hbase cloudera

【解决方案1】：

您需要将正确的jar文件添加到您的项目中，将htrace-core-3.1.0 jar文件添加到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>

【讨论】：