ORA-12537: TNS:connection closed

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

[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Common/functions.php (76) halt(ORA-12537: TNS:connection closed)
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Extend/Driver/Db/DbOracle.class.php (273) throw_exception(ORA-12537: TNS:connection closed, , 12537)
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Extend/Driver/Db/DbOracle.class.php (56) DbOracle->error()
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Lib/Core/Db.class.php (162) DbOracle->connect()
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Extend/Driver/Db/DbOracle.class.php (82) Db->initConnect()
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Lib/Core/Model.class.php (1078) DbOracle->query(select DISTINCT pc.paramvaluecode,pc.paramvalue from tb_goods_info gi,tb_param_code pc
where gi.goodstypeid = pc.paramvaluecode and pc.paramtype='GOODS_CATEGORY' and gi.brandid =84)
[25-05-20 21:38:05] /data/www/uhuibao/Home/Lib/Action/PinpaiAction.class.php (139) Model->query(select DISTINCT pc.paramvaluecode,pc.paramvalue from tb_goods_info gi,tb_param_code pc
where gi.goodstypeid = pc.paramvaluecode and pc.paramtype='GOODS_CATEGORY' and gi.brandid =%d, Array)
[25-05-20 21:38:05] /data/www/uhuibao/Home/Lib/Action/PinpaiAction.class.php (68) PinpaiAction->GetBrandGoodsType(84)
[25-05-20 21:38:05] () PinpaiAction->Detail()
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Lib/Core/App.class.php (186) ReflectionMethod->invoke()
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Lib/Core/App.class.php (222) App::exec()
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Lib/Core/Think.class.php (39) App::run()
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/Common/runtime.php (240) Think::start()
[25-05-20 21:38:05] /data/www/uhuibao/ThinkPHP/ThinkPHP.php (30) require(/data/www/uhuibao/ThinkPHP/Common/runtime.php)
[25-05-20 21:38:05] /data/www/uhuibao/index.php (9) require(/data/www/uhuibao/ThinkPHP/ThinkPHP.php)