今天應用報錯，嘗試重啟db2服務，報錯了：

[db2inst1@localhost db2dump]$ db2stop

03/16/2012 14:13:04 0 0 SQL1025N The database manager was not stopped because databases are still active.

SQL1025N The database manager was not stopped because databases are still active.

之後執行強制關閉：

[db2inst1@localhost db2dump]$ db2stop force

03/16/2012 14:14:52 0 0 SQL1064N DB2STOP processing was successful.

SQL1064N DB2STOP processing was successful.

關閉成功了

再次啟動資料庫：

[db2inst1@localhost db2dump]$ db2start

03/16/2012 14:15:00 0 0 SQL1063N DB2START processing was successful.

SQL1063N DB2START processing was successful.

然後連線資料庫報錯了：

[db2inst1@localhost db2dump]$ db2

(c) Copyright IBM Corporation 1993,2007

Command Line Processor for DB2 Client 9.7.5

You can issue database manager commands and SQL statements from the command

prompt. For example:

db2 => connect to sample

db2 => bind sample.bnd

For general help, type: ?.

For command help, type: ? command, where command can be

the first few keywords of a database manager command. For example:

? CATALOG DATABASE for help on the CATALOG DATABASE command

? CATALOG for help on all of the CATALOG commands.

To exit db2 interactive mode, type QUIT at the command prompt. Outside

interactive mode, all commands must be prefixed with 'db2'.

To list the current command option settings, type LIST COMMAND OPTIONS.

For more detailed help, refer to the Online Reference Manual.

db2 => connect to newhis

SQL0752N Connecting to a database is not permitted within a logical unit of

work when the CONNECT type 1 setting is in use. SQLSTATE=0A001

類連線設定時，在邏輯工作單元內不允許連線資料庫。

解釋:
發出 COMMIT 或 ROLLBACK
語句之前，嘗試連線另一個資料庫或同一個資料庫。在 CONNECT 1
類環境內不能處理該請求。

退出執行reset

重新執行就可以了，

[db2inst1@localhost ~]$ db2 connect reset

[db2inst1@localhost db2dump]$ db2 connect to newhis

Database Connection Information

Database server = DB2/LINUX 9.7.5

SQL authorization ID = DB2INST1

Local database alias = NEWHIS

一切正常了