CDH 5.10.2 添加Hive HiveMetastore不能启动的坑

今天用CDH 5.10.2版本添加Hive组件的时候，持续报错，不得不说这个版本真能锻炼人…

首先报的是驱动类找不到的异常，将mysql的jdbc包放到/usr/share/java目录下，注意去掉版本名称。

错误1：
错误1截图：

错误2截图：

错误1.

Caused by: javax.jdo.JDODataStoreException: Required table missing : "`VERSION`" in Catalog "" Schema "". DataNucleus requires this table to perform its persistence operations. Either your MetaData is incorrect, or you need to enable "datanucleus.autoCreateTables"
NestedThrowables:
org.datanucleus.store.rdbms.exceptions.MissingTableException: Required table missing : "`VERSION`" in Catalog "" Schema "". DataNucleus requires this table to perform its persistence operations. Either your MetaData is incorrect, or you need to enable "datanucleus.autoCreateTables"
        at org.datanucleus.api.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:461)
        at org.datanucleus.api.jdo.JDOPersistenceManager.jdoMakePersistent(JDOPersistenceManager.java:732)
        at org.datanucleus.api.jdo.JDOPersistenceManager.makePersistent(JDOPersistenceManager.java:752)
        at org.apache.hadoop.hive.metastore.ObjectStore.setMetaStoreSchemaVersion(ObjectStore.java:6664)

解决：

    datanucleus.readOnlyDatastore
    false

 
    datanucleus.fixedDatastore
    false 

 
    datanucleus.autoCreateSchema 
    true 


    datanucleus.autoCreateTables
    true


    datanucleus.autoCreateColumns
    true

错误2.

[main]: MetaException(message:Version information not found in metastore. )
	at org.apache.hadoop.hive.metastore.ObjectStore.checkSchema(ObjectStore.java:7205)
	at org.apache.hadoop.hive.metastore.ObjectStore.verifySchema(ObjectStore.java:7186)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.hive.metastore.RawStoreProxy.invoke(RawStoreProxy.java:103)
	at com.sun.proxy.$Proxy7.verifySchema(Unknown Source)
	at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:629)
	at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:677)
	at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:486)
	at org.apache.hadoop.hive.metastore.RetryingHMSHandler.(RetryingHMSHandler.java:78)
	at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:84)
	at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:5946)
	at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:5941)
	at org.apache.hadoop.hive.metastore.HiveMetaStore.startMetaStore(HiveMetaStore.java:6193)
	at org.apache.hadoop.hive.metastore.HiveMetaStore.main(HiveMetaStore.java:6118)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:13

解决：

    hive.metastore.schema.verification
    false

错误3：

hive> show tables;
FAILED: Error in metadata: MetaException(message:Got exception: javax.jdo.JDODataStoreException An exception was thrown while adding/validating class(es) : Specified key was too long; max key length is 767 bytescom.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is 767 bytes

这是由于mysql的最大索引长度导致，MySQL的varchar主键只支持不超过768个字节 或者 768/2=384个双字节 或者 768/3=256个三字节的字段 而 GBK是双字节的，UTF-8是三字节的。

解决：

数据库的字符集除了system为utf8，其它最好为latin1，否则可能出现如上异常，在mysql机器的上运行:
mysql> show variables like '%char%';
mysql> alter database 库名 character set latin1;