hibernate连接ORACLE时报错 - Java / Web 开发

2010-05-13 10:29:35,499 [com.mchange.v2.resourcepool.BasicResourcePool] com.mcha
nge.v2.resourcepool.BasicResourcePool$AcquireTask@177fa9a -- Acquisition Attempt
 Failed!!! Clearing pending acquires. While trying to acquire a needed new resou
rce, we failed to succeed more than the maximum number of allowed acquisition at
tempts (5). Last acquisition attempt exception:
java.sql.SQLException: Io 异常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=169
869568)(ERR=12519)(ERROR_STACK=(ERROR=(CODE=12519)(EMFI=4))))
  at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
  at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
  at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334)
  at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:418)

  at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.ja
va:521)
  at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:325)
  at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManag
erDataSource.java:134)
  at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnecti
on(WrapperConnectionPoolDataSource.java:182)
  at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnecti
on(WrapperConnectionPoolDataSource.