hive 错误 InvalidObjectException(message:Role admin already exists.)

InvalidObjectException(message:Role admin already exists.)
        at org.apache.hadoop.hive.metastore.ObjectStore.addRole(ObjectStore.java:3020)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:108)
        at com.sun.proxy.$Proxy9.addRole(Unknown Source)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultRoles(HiveMetaStore.java:544)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:398)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore.java:356)


InvalidObjectException(message:Role public already exists.)
        at org.apache.hadoop.hive.metastore.ObjectStore.addRole(ObjectStore.java:3020)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:108)
        at com.sun.proxy.$Proxy9.addRole(Unknown Source)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultRoles(HiveMetaStore.java:553)

InvalidObjectException(message:All is already granted by admin)
        at org.apache.hadoop.hive.metastore.ObjectStore.grantPrivileges(ObjectStore.java:3713)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:108)
        at com.sun.proxy.$Proxy9.grantPrivileges(Unknown Source)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultRoles(HiveMetaStore.java:567)

由于最近使用大数据的hive，生产环境较为稳定，我私下搭了一个环境，出现了问题，就是上面的异常，这个异常我在网上查了好久，数据库删了几次，hdfs删了几次，还是无法解决，一启动hive就报上面的错误（这个错误会导致无法删除数据库，一些莫名其妙的错误），我研究了2个多小时，终于找到了问题所在，现在说说下面该处理这个问题


现在先说说hive的配置
<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:mysql://m1-4:3306/hive?createDatabaseIfNotExist=true</value>
</property>

<property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>com.mysql.jdbc.Driver</value>
</property>



createDatabaseIfNotExist=true   这句话的意思显而易见  如果不存在创建数据库

这个就方便了一个事，就是在mysql的数据库里面不用写  create database hive;

但是它的管理权限就混乱，跟线上的权限表GLOBAL_PRIVS 虽然一致，但是启动就会报上面的异常

后来我删掉了hive数据库，手动建立了create database hive;

然后为了避免错误 又做了一次数据转码 alter database hive character set latin1;

这次再连接hive  没出现错误，能正常删除hive内部的表