hive启动错误总结

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