大数据原理与技术学习——问题（2）

• 问题
  WARNING: An illegal reflective access operation has occurred
  WARNING: Illegal reflective access by org.apache.hadoop.security.authentication.util.KerberosUtil (file:/usr/local/hbase/lib/hadoop-auth-2.5.1.jar) to method sun.security.krb5.Config.getInstance()
  WARNING: Please consider reporting this to the maintainers of org.apache.hadoop.security.authentication.util.KerberosUtil
  WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
  WARNING: All illegal access operations will be denied in a future release

• 问题描述
  今天在用eclipse写Hbse Java程序的时候，遇到这样一个问题，虽然是WARNING, 但是在后面写数据库的时候就抛出一系列的问题，例如下面这个：
  java.io.IOException: java.lang.reflect.InvocationTargetException
  at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:240)
  at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:218)
  at org.apache.hadoop.hbase.client.ConnectionFactory.createConnection(ConnectionFactory.java:119)
  at ExampleForHbase.init(ExampleForHbase.java:55)
  at ExampleForHbase.createTable(ExampleForHbase.java:83)
  at ExampleForHbase.main(ExampleForHbase.java:14)
  
  ，导致无法对hbase进行操作！！！

• 解决办法

  在查找网上的信息后，找到解决办法：更换低版本的jdk，一开始我用的jdk_12.0.1，然后我改为jdk_1.8.0_211
  然后问题就解决啦。