1，mysql加载的jar包未找到！
.........
Caused by: org.datanucleus.exceptions.NucleusException: Attempt to invoke the "BONECP" plugin to create a ConnectionPool gave an error : The specified datastore driver ("com.mysql.jdbc.Driver") was not found in the CLASSPATH. Please check your CLASSPATH specification, and the name of the driver.
at org.datanucleus.store.rdbms.ConnectionFactoryImpl.generateDataSources(ConnectionFactoryImpl.java:232)
at org.datanucleus.store.rdbms.ConnectionFactoryImpl.initialiseDataSources(ConnectionFactoryImpl.java:117)
at org.datanucleus.store.rdbms.ConnectionFactoryImpl.<init>(ConnectionFactoryImpl.java:82)
... 79 more
Caused by: org.datanucleus.store.rdbms.connectionpool.DatastoreDriverNotFoundException: The specified datastore driver ("com.mysql.jdbc.Driver") was not found in the CLASSPATH. Please check your CLASSPATH specification, and the name of the driver.
at org.datanucleus.store.rdbms.connectionpool.AbstractConnectionPoolFactory.loadDriver(AbstractConnectionPoolFactory.java:58)
at org.datanucleus.store.rdbms.connectionpool.BoneCPConnectionPoolFactory.createConnectionPool(BoneCPConnectionPoolFactory.java:54)
at org.datanucleus.store.rdbms.ConnectionFactoryImpl.generateDataSources(ConnectionFactoryImpl.java:213)
... 81 more
解决办法：
在mysql 官网下载 mysql-connector-java-5.0.8.tar.gz 的压缩包， 链接：mysql-connector下载 ，
下载好后解压，将mysql-connector-java-5.0.8-bin.jar文件移动到 hive的安装目录下的lib文件夹下。
tar -zxvf mysql-connector-java-5.0.8.tar.gz # 解压
mv mysql-connector-java-5.0.8、mysql-connector-java-5.0.8-bin.jar hive/lib/ #其中 hive/lib 为你的安装目录
注意：其中的 hive为你的安装hive安装目录。
2，MetaException(message 异常
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1652)
... 23 more
Caused by: MetaException(message:Version information not found in metastore. )
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:83)
at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:92)
at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6608)
at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:239)
at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.<init>(SessionHiveMetaStoreClient.java:70)
... 28 more
Caused by: MetaException(message:Version information not found in metastore. )
at org.apache.hadoop.hive.metastore.ObjectStore.checkSchema(ObjectStore.java:7754)
解决方式：在hive/conf下的hive-site.xml文件中配置hive.metastore.schema.verification 属性为false：
<property>
<name>hive.metastore.schema.verification</name>
<value>false</value>
</property>
其中hive.metastore.schema.verification防止架构版本不兼容时的 Metastore 操作。考虑将此设置为“True”，以减少 Metastore 操作期间发生架构损坏的可能性
3，MetaException(message:Hive metastore database is not initialized数据库没有初始化.
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: MetaException(message:Hive metastore database is not initialized. Please use schematool (e.g. ./schematool -initSchema -dbType ...) to create the schema. If needed, don't forget to include the option to auto-create the underlying database in your JDBC connection string (e.g. ?createDatabaseIfNotExist=true for mysql))
at org.apache.hadoop.hive.ql.metadata.Hive.getAllFunctions(Hive.java:3793)
at org.apache.hadoop.hive.ql.metadata.Hive.reloadFunctions(Hive.java:244)
at org.apache.hadoop.hive.ql.metadata.Hive.registerAllFunctionsOnce(Hive.java:227)
... 14 more
Caused by: MetaException(message:Hive metastore database is not initialized. Please use schematool (e.g. ./schematool -initSchema -dbType ...) to create the schema. If needed, don't forget to include the option to auto-create the underlying database in your JDBC connection string (e.g. ?createDatabaseIfNotExist=true for mysql))
at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3556)
at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3528)
at org.apache.hadoop.hive.ql.metadata.Hive.getAllFunctions(Hive.java:3790)
... 16 more
这是由于没有初始化数据库，生成元数据。 需要执行以下指令(在hive的bin目录下执行)
./schematool -initSchema -dbType mysql
