SQL代理连接不上SQL服务 SQLSTATE 08S01

错误代码如下，请大侠们帮忙看看！！！
平时用的好好的，到半夜就经常出现这种情况。

Date 2011-12-19 4:51:30
Log SQL Server Agent (Archive #3 - 2011-12-19 9:05:00)

Message
[298] SQLServer Error: 10054, TCP Provider: An existing connection was forcibly closed by the remote host. [SQLSTATE 08S01]

Date 2011-12-19 4:51:30
Log SQL Server Agent (Archive #3 - 2011-12-19 9:05:00)

Message
[298] SQLServer Error: 10054, Communication link failure [SQLSTATE 08S01]

Date 2011-12-19 4:51:30
Log SQL Server Agent (Archive #3 - 2011-12-19 9:05:00)

Message
[165] ODBC Error: 0, An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. [SQLSTATE 08001]


Date 2011-12-19 4:51:30
Log SQL Server Agent (Archive #3 - 2011-12-19 9:05:00)

Message
[382] Logon to server 'SQLServer' failed (ConnUpdateStartExecutionDate)

另外：发生这种情况时，处于running状态的进程比较多。

解决方法是，重启agent服务，一切恢复正常。

是不是因为有作业在连接,而互相产生了锁什么的?

agent服务就是代理服务

半夜出问题？

是啊，有鬼啊

半夜也没有什么作业在跑

；还有人管吗