Caused by: java.sql.SQLException: Failed to start database 'metastore_db' with class loader sun.misc

Caused by: java.sql.SQLException: Failed to start database 'metastore_db' with class loader sun.misc.Launcher$AppClassLoader@234f79cb, see the next exception for details.
	at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.Util.seeNextException(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
	at org.apache.derby.impl.jdbc.EmbedConnection40.<init>(Unknown Source)
	at org.apache.derby.jdbc.Driver40.getNewEmbedConnection(Unknown Source)
	at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
	at org.apache.derby.jdbc.Driver20.connect(Unknown Source)
	at org.apache.derby.jdbc.AutoloadedDriver.connect(Unknown Source)
	at java.sql.DriverManager.getConnection(DriverManager.java:571)
	at java.sql.DriverManager.getConnection(DriverManager.java:187)
	at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:361)
	at com.jolbox.bonecp.BoneCP.<init>(BoneCP.java:416)
	... 60 more
Caused by: java.sql.SQLException: Failed to start database 'metastore_db' with class loader sun.misc.Launcher$AppClassLoader@234f79cb, see the next exception for details.
	at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)
	... 74 more
Caused by: java.sql.SQLException: Database at /root/metastore_db has an incompatible format with the current version of the software.  The database was created by or upgraded by version 10.12.
	at org.apache.derby.impl.jdbc.SQLExceptionFactory.getSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.SQLExceptionFactory40.wrapArgsForTransportAcrossDRDA(Unknown Source)
	at org.apache.derby.impl.jdbc.SQLExceptionFactory40.getSQLException(Unknown Source)
	at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Unknown Source)
	... 71 more
Caused by: ERROR XSLAN: Database at /root/metastore_db has an incompatible format with the current version of the software.  The database was created by or upgraded by version 10.12.

解决：
这个可能是元数据冲突导致的。

还要删除hive-site.xml文件里面的：

  <property>
  <name>hive.metastore.uris</name>
  <value>thrift://hadoop01:9083</value>
</property>