要疯了，hibernate链接oracle总是报错，求大神指点下

20 [main] INFO org.hibernate.cfg.Environment - Hibernate 3.3.1.GA
26 [main] INFO org.hibernate.cfg.Environment - hibernate.properties not found
31 [main] INFO org.hibernate.cfg.Environment - Bytecode provider name : javassist
37 [main] INFO org.hibernate.cfg.Environment - using JDK 1.4 java.sql.Timestamp handling
101 [main] INFO org.hibernate.cfg.Configuration - configuring from resource: /hibernate.cfg.xml
101 [main] INFO org.hibernate.cfg.Configuration - Configuration resource: /hibernate.cfg.xml
210 [main] INFO org.hibernate.cfg.Configuration - Reading mappings from resource : com/hsp/domain/Employee.hbm.xml
354 [main] INFO org.hibernate.cfg.HbmBinder - Mapping class: com.hsp.domain.Employee -> employee
368 [main] INFO org.hibernate.cfg.Configuration - Configured SessionFactory: null
444 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - Using Hibernate built-in connection pool (not for production use!)
444 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - Hibernate connection pool size: 20
444 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - autocommit mode: false
556 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - using driver: oracle.jdbc.driver.OracleDriver at URL: jdbc:oracle:thin:@localhost:1521:orcl.168.1.107
556 [main] INFO org.hibernate.connection.DriverManagerConnectionProvider - connection properties: {user=scott, password=****}
682 [main] WARN org.hibernate.cfg.SettingsFactory - Could not obtain connection metadata
java.sql.SQLRecoverableException: Io 异常: Undefined Error
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:101)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:229)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:458)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:411)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:490)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:202)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:474)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:111)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2101)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1325)
at com.hsp.view.TestMain.main(TestMain.java:25)
709 [main] INFO org.hibernate.dialect.Dialect - Using dialect: org.hibernate.dialect.OracleDialect
711 [main] WARN org.hibernate.dialect.Oracle9Dialect - The Oracle9Dialect dialect has been deprecated; use either Oracle9iDialect or Oracle10gDialect instead
713 [main] WARN org.hibernate.dialect.OracleDialect - The OracleDialect dialect has been deprecated; use Oracle8iDialect instead
714 [main] INFO org.hibernate.transaction.TransactionFactoryFactory - Using default transaction strategy (direct JDBC transactions)
716 [main] INFO org.hibernate.transaction.TransactionManagerLookupFactory - No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended)
716 [main] INFO org.hibernate.cfg.SettingsFactory - Automatic flush during beforeCompletion(): disabled
716 [main] INFO org.hibernate.cfg.SettingsFactory - Automatic session close at end of transaction: disabled
717 [main] INFO org.hibernate.cfg.SettingsFactory - Scrollable result sets: disabled
717 [main] INFO org.hibernate.cfg.SettingsFactory - JDBC3 getGeneratedKeys(): disabled
717 [main] INFO org.hibernate.cfg.SettingsFactory - Connection release mode: auto
718 [main] INFO org.hibernate.cfg.SettingsFactory - Default batch fetch size: 1
718 [main] INFO org.hibernate.cfg.SettingsFactory - Generate SQL with comments: disabled
718 [main] INFO org.hibernate.cfg.SettingsFactory - Order SQL updates by primary key: disabled
718 [main] INFO org.hibernate.cfg.SettingsFactory - Order SQL inserts for batching: disabled
718 [main] INFO org.hibernate.cfg.SettingsFactory - Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
720 [main] INFO org.hibernate.hql.ast.ASTQueryTranslatorFactory - Using ASTQueryTranslatorFactory
720 [main] INFO org.hibernate.cfg.SettingsFactory - Query language substitutions: {}
720 [main] INFO org.hibernate.cfg.SettingsFactory - JPA-QL strict compliance: disabled
720 [main] INFO org.hibernate.cfg.SettingsFactory - Second-level cache: enabled
720 [main] INFO org.hibernate.cfg.SettingsFactory - Query cache: disabled
720 [main] INFO org.hibernate.cfg.SettingsFactory - Cache region factory : org.hibernate.cache.impl.NoCachingRegionFactory
720 [main] INFO org.hibernate.cfg.SettingsFactory - Optimize cache for minimal puts: disabled
721 [main] INFO org.hibernate.cfg.SettingsFactory - Structured second-level cache entries: disabled
725 [main] INFO org.hibernate.cfg.SettingsFactory - Statistics: disabled
725 [main] INFO org.hibernate.cfg.SettingsFactory - Deleted entity synthetic identifier rollback: disabled
725 [main] INFO org.hibernate.cfg.SettingsFactory - Default entity-mode: pojo
725 [main] INFO org.hibernate.cfg.SettingsFactory - Named query checking : enabled
773 [main] INFO org.hibernate.impl.SessionFactoryImpl - building session factory
1000 [main] INFO org.hibernate.impl.SessionFactoryObjectFactory - Not binding factory to JNDI, no JNDI name configured
1040 [main] WARN org.hibernate.util.JDBCExceptionReporter - SQL Error: 17002, SQLState: 08006
1040 [main] ERROR org.hibernate.util.JDBCExceptionReporter - Io 异常: Undefined Error
Exception in thread "main" org.hibernate.exception.JDBCConnectionException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:97)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:52)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:449)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1353)
at com.hsp.view.TestMain.main(TestMain.java:29)
Caused by: java.sql.SQLRecoverableException: Io 异常: Undefined Error
at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:101)
at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:229)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:458)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:411)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:490)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:202)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:474)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
... 5 more