HIBRNATE多线程测试遇到ORA-06512，ORA-07445

今天在测试Hibrnate的多线程时，遇到如下错误：

java.sql.SQLException: ORA-00604: 递归 SQL 级别 1 出现错误 ORA-00001: 违反唯一约束条件 (TRACE_FILES.AVAIL_TRACE_FILES_PK) ORA-06512: 在 line 7
    at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:283)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:278)
    at oracle.jdbc.driver.T4C7Ocommoncall.receive(T4C7Ocommoncall.java:141)
    at oracle.jdbc.driver.T4CConnection.logoff(T4CConnection.java:465)
    at oracle.jdbc.driver.PhysicalConnection.close(PhysicalConnection.java:1228)
    at org.hibernate.connection.DriverManagerConnectionProvider.closeConnection(DriverManagerConnectionProvider.java:137)
    at org.hibernate.jdbc.ConnectionManager.closeConnection(ConnectionManager.java:451)
    at org.hibernate.jdbc.ConnectionManager.aggressiveRelease(ConnectionManager.java:406)
    at org.hibernate.jdbc.ConnectionManager.afterTransaction(ConnectionManager.java:293)
    at org.hibernate.jdbc.JDBCContext.afterTransactionCompletion(JDBCContext.java:221)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:119)
    at com.teapot.hello.TxMessage.InsertMessage(TxMessage.java:30)
    at com.teapot.hello.TxMessage.run(TxMessage.java:36)
    at java.lang.Thread.run(Thread.java:595)
SQL Error: 604, SQLState: 60000
ORA-00604: 递归 SQL 级别 1 出现错误 ORA-00001: 违反唯一约束条件 (TRACE_FILES.AVAIL_TRACE_FILES_PK) ORA-06512: 在 line 7

在Oracle的alert警告日志文件中：报错如下：
Errors in file d:\oracle\product\10.2.0\admin\orcl\udump\orcl_ora_7572.trc:
ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [unable_to_trans_pc] [PC:0x7C931689] [ADDR:0x0] [UNABLE_TO_READ] []

看看07445的错误解释：
07445, 00000, "exception encountered: core dump [%s] [%s] [%s] [%s] [%s] [%s]"
// *Cause: An OS exception occurred which should result in the creation of a
//         core file.  This is an internal error.
// *Action: Contact your customer support representative.

重启数据库，检查数据的参数

SYS@ORCL> show parameter sga

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
lock_sga                             boolean     FALSE
pre_page_sga                         boolean     FALSE
sga_max_size                         big integer 300M
sga_target                           big integer 300M

SYS@ORCL> show parameter shared

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
hi_shared_memory_address             integer     0
max_shared_servers                   integer
shared_memory_address                integer     0
shared_pool_reserved_size            big integer 5033164
shared_pool_size                     big integer 0
shared_server_sessions               integer
shared_servers                       integer     0

SYS@ORCL> show parameter db_cache

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_cache_advice                      string      ON
db_cache_size                        big integer 0

如上参数：shared_pool_size，db_cache_size都是0
修改过来：
SYS@ORCL> alter system set shared_pool_size=48M
  2  ;

系统已更改。

SYS@ORCL> alter system set db_cache_size=150M;

系统已更改。

再进行测试，Hibrnate运行正常