hive啟動錯誤總結

1，mysql加載的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

　　

解決辦法：

     在mysql 官網下載  mysql-connector-java-5.0.8.tar.gz 的壓縮包， 鏈接：mysql-connector下載 ，

     下載好后解壓，將mysql-connector-java-5.0.8-bin.jar文件移動到 hive的安裝目錄下的lib文件夾下。

tar -zxvf mysql-connector-java-5.0.8.tar.gz  # 解壓
mv mysql-connector-java-5.0.8、mysql-connector-java-5.0.8-bin.jar hive/lib/  #其中 hive/lib 為你的安裝目錄 

     注意：其中的 hive為你的安裝hive安裝目錄。
2，MetaException(message 異常

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)

  解決方式：在hive/conf下的hive-site.xml文件中配置hive.metastore.schema.verification 屬性為false：

   <property>
       <name>hive.metastore.schema.verification</name>
       <value>false</value>
   </property>

其中hive.metastore.schema.verification防止架構版本不兼容時的 Metastore 操作。考慮將此設置為“True”，以減少 Metastore 操作期間發生架構損壞的可能性

3，MetaException(message:Hive metastore database is not initialized數據庫沒有初始化.

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

這是由於沒有初始化數據庫，生成元數據。 需要執行以下指令(在hive的bin目錄下執行) 

./schematool -initSchema -dbType mysql