ORA-12537: TNS:connection closed

FILE: /data/www/uhuibao/ThinkPHP/Common/functions.php 　LINE: 76

[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Common/functions.php (76) halt(ORA-12537: TNS:connection closed)
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Extend/Driver/Db/DbOracle.class.php (273) throw_exception(ORA-12537: TNS:connection closed, , 12537)
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Extend/Driver/Db/DbOracle.class.php (56) DbOracle->error()
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Lib/Core/Db.class.php (162) DbOracle->connect()
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Extend/Driver/Db/DbOracle.class.php (82) Db->initConnect()
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Lib/Core/Db.class.php (733) DbOracle->query(SELECT * FROM (SELECT thinkphp.*, rownum AS numrow FROM (SELECT SHOPSID FROM tb_shop_info WHERE SHOPINFOID=9766) thinkphp ) WHERE (numrow>0 AND numrow<=1))
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Lib/Core/Model.class.php (713) Db->select(Array)
[25-05-17 13:24:05] /data/www/uhuibao/Home/Lib/Action/ShangjiaAction.class.php (405) Model->getField(SHOPSID)
[25-05-17 13:24:05] /data/www/uhuibao/Home/Lib/Action/ShangjiaAction.class.php (15) ShangjiaAction->GetShopUserID(9766)
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Lib/Core/Action.class.php (57) ShangjiaAction->_initialize()
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Common/common.php (302) Action->__construct()
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Lib/Core/App.class.php (118) A(Shangjia)
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Lib/Core/App.class.php (222) App::exec()
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Lib/Core/Think.class.php (39) App::run()
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/Common/runtime.php (240) Think::start()
[25-05-17 13:24:05] /data/www/uhuibao/ThinkPHP/ThinkPHP.php (30) require(/data/www/uhuibao/ThinkPHP/Common/runtime.php)
[25-05-17 13:24:05] /data/www/uhuibao/index.php (9) require(/data/www/uhuibao/ThinkPHP/ThinkPHP.php)