Oozie时出现Exception in thread "main" java.lang.UnsupportedClassVersionError: com/mysql/jdbc/Driver : Unsupported major.minor version 52.0？

　　不多说，直接上干货！

　　问题详情

[hadoop@bigdatamaster oozie-4.1.-cdh5.5.4]$ bin/ooziedb.sh create -sqlfile oozie.sql -run DB Connection

[hadoop@bigdatamaster oozie-4.1.-cdh5.5.4]$ bin/ooziedb.sh create -sqlfile oozie.sql -run DB Connection
  setting CATALINA_OPTS="$CATALINA_OPTS -Xmx1024m"

Validate DB Connection
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/mysql/jdbc/Driver : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:)
    at java.net.URLClassLoader.access$(URLClassLoader.java:)
    at java.net.URLClassLoader$.run(URLClassLoader.java:)
    at java.net.URLClassLoader$.run(URLClassLoader.java:)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:)
    at org.apache.oozie.tools.OozieDBCLI.createConnection(OozieDBCLI.java:)
    at org.apache.oozie.tools.OozieDBCLI.validateConnection(OozieDBCLI.java:)
    at org.apache.oozie.tools.OozieDBCLI.createDB(OozieDBCLI.java:)
    at org.apache.oozie.tools.OozieDBCLI.run(OozieDBCLI.java:)
    at org.apache.oozie.tools.OozieDBCLI.main(OozieDBCLI.java:)

解决办法

　　原因：

　　1、jdk7+老版5.0驱动com/mysql/jdbc/Driver  （同时，多试试几个版本。mysql-connector-java-5.1.31-bin.jar  和 mysql-connector-java-5.1.21-bin.jar ）
　　2、jdk8+新版6.0驱动com/mysql/cj/jdbc/Driver

　　对于这样的mysql驱动包，怎么去下载，建议去http://mvnrepository.com/。当然你也可以去CSDN资源里去。这里不多赘述

  mysql-connector-java-5.1..jar

　

　　即可。

　　成功！

　　然后呢，大家也许还会出现如下问题：

Oozie安装时放置Mysql驱动包的总结（网上最全）

Oozie时出现org.apache.oozie.service.ServiceException: E0103: Could not load service classes, Cannot load JDBC driver class 'com.mysql.jdbc.Driver'

Oozie时bin/oozied.sh start或bin/oozied.sh run出现Bootstrap进程无法启动，http://bigdatamaster:11000/oozie界面也无法打开？E0103: Could not load service classes,

java.lang.ClassNotFoundException: Class org.apache.oozie.ser

Oozie时bin/oozied.sh start或bin/oozied.sh run出现Bootstrap进程无法启动，http://bigdatamaster:11000/oozie界面也无法打开？

Oozie时出现Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure？

Oozie时出现Exception in thread "main" java.lang.UnsupportedClassVersionError: com/mysql/jdbc/Driver : Unsupported major.minor version 52.0？

CDH版本的oozie安装执行bin/oozie-setup.sh prepare-war，没生成oozie.war?