ALTER DATABASE失败,因为无法将锁定放在数据库上

Question

我需要重新启动数据库,因为某些进程无法正常工作.我的计划是让它脱机并重新上线.

我试图在Sql Server Management Studio 2008中执行此操作:

use master;
go
alter database qcvalues
set single_user
with rollback immediate;
alter database qcvalues
set multi_user;
go

我收到这些错误:

Msg 5061, Level 16, State 1, Line 1
ALTER DATABASE failed because a lock could not be placed on database 'qcvalues'. Try again later.
Msg 5069, Level 16, State 1, Line 1
ALTER DATABASE statement failed.
Msg 5061, Level 16, State 1, Line 4
ALTER DATABASE failed because a lock could not be placed on database 'qcvalues'. Try again later.
Msg 5069, Level 16, State 1, Line 4
ALTER DATABASE statement failed.

我究竟做错了什么？

Answer 1

收到错误后,运行

EXEC sp_who2

在列表中查找数据库.连接可能没有终止.如果找到与数据库的任何连接,请运行

KILL <SPID>

<SPID>连接到数据库的会话的SPID 在哪里.

删除所有与数据库的连接后,请尝试使用脚本.

不幸的是,我没有理由为什么你会看到这个问题,但这里有一个链接,表明问题已在其他地方发生.

http://www.geakeit.co.uk/2010/12/11/sql-take-offline-fails-alter-database-failed-because-a-lock-could-not-error-5061/

Answer 2

我设法通过执行以下操作重现此错误.

连接1(运行几分钟)

CREATE DATABASE TESTING123
GO

USE TESTING123;

SELECT NEWID() AS X INTO FOO
FROM sys.objects s1,sys.objects s2,sys.objects s3,sys.objects s4 ,sys.objects s5 ,sys.objects s6

连接2和3

set lock_timeout 5;

ALTER DATABASE TESTING123 SET SINGLE_USER WITH ROLLBACK IMMEDIATE;