Question

面对DB2中一个奇怪的问题。无法连接到远程数据库。已成功编目。但是当尝试连接到数据库别名时，出现错误

“ SQL30061N数据库别名或数据库名称“ NDTEST”不是在远程节点上找到。”

OS：-Linux

DB2Level：-

DB21085I  This instance or install (instance name, where applicable:
"db2inst1") uses "64" bits and DB2 code release "SQL10055" with level
identifier "0606010E".
Informational tokens are "DB2 v10.5.0.5", "s141128", "IP23633", and Fix Pack
"5".
Product is installed at "/path/to/db2".

但是我们没有提到任何东西“ NDTEST”。

Database alias                       = QAZWSXED
 Database name                        = NEWDB(changedName)
 Node name                            = BASENNEW
 Database release level               = 10.00
 Comment                              =
 Directory entry type                 = Remote
 Authentication                       = SERVER_ENCRYPT
 Catalog database partition number    = -1
 Alternate server hostname            =
 Alternate server port number         =

 Node name                      = BASENNEW
 Comment                        =
 Directory entry type           = LOCAL
 Protocol                       = TCPIP
 Hostname                       = hostname
 Service name                   = portNumber

db2 connect to QAZWSXED
SQL30061N  The database alias or database name "NDTEST         " was not
found at the remote node.  SQLSTATE=08004

Answer 1

错误意味着确切的意思-BASENNEW节点上没有NEWDB数据库。

您能够对数据库进行分类的事实并不意味着它实际上已经存在。 CATALOG DATABASE命令期间没有尝试连接（不提示输入密码）。

例如如果我要为我的实例创建本地TCP / IP环回：

$ db2 catalog tcpip node loop remote localhost server  61115

我可以毫无问题地对现有数据库（SAMPLE）和不存在数据库（BADDB）进行分类：

$ db2 catalog database sample as loopsamp at node loop
DB20000I  The CATALOG DATABASE command completed successfully.
DB21056W  Directory changes may not be effective until the directory cache is 
refreshed.
$ db2 catalog database baddb as loopbad at node loop
DB20000I  The CATALOG DATABASE command completed successfully.
DB21056W  Directory changes may not be effective until the directory cache is 
refreshed.

我将能够连接到第一个：

Enter current password for kkuduk: 

   Database Connection Info
 Database server        = DB2/LINUXX8664 11.5.0.0
 SQL authorization ID   = KKUDUK
 Local database alias   = LOOPSAMP

但是尝试与不存在的连接的连接将失败，并使用SQL30061N

db2 connect to loopbad user kkuduk
Enter current password for kkuduk: 
SQL30061N  The database alias or database name "BADDB             " was not 
found at the remote node.  SQLSTATE=08004

请通过runnnig验证远程服务器上的节点目录

$ db2 list db directory

并查看您的数据库是否有一个类型为间接

的条目

Directory entry type                 = Indirect

编辑：我没有注意到您所做的修改更改了数据库名称。如果错误返回停止的数据库名称，则确实需要db2 terminate来创建新的CLP客户端应用程序（db2bp）。

例如如果我将不正确的条目取消目录并再次分类，我将得到类似的错误，因为客户端将使用指向错误数据库名称的缓存条目：

$ db2 uncatalog db LOOPBAD
DB20000I  The UNCATALOG DATABASE command completed successfully.
DB21056W  Directory changes may not be effective until the directory cache is 
refreshed.
$ db2 catalog database sample as loopbad at node loop
DB20000I  The CATALOG DATABASE command completed successfully.
DB21056W  Directory changes may not be effective until the directory cache is 
refreshed.
$ db2 connect to loopbad user kkuduk
Enter current password for kkuduk: 
SQL30061N  The database alias or database name "BADDB             " was not 
found at the remote node.  SQLSTATE=08004

db2 terminate终止Db2 CLP客户端后端，并从目录中正确读取新条目：

$ db2 terminate
DB20000I  The TERMINATE command completed successfully.
$ db2 connect to loopbad user kkuduk
Enter current password for kkuduk: 

   Database Connection Information

 Database server        = DB2/LINUXX8664 11.5.0.0
 SQL authorization ID   = KKUDUK
 Local database alias   = LOOPBAD

Answer 2

发现问题-DCS（数据库连接服务）中只有一个条目。查看DCS详细信息

db2列表dcs目录

以上命令提供了一个DCS条目，其目标数据库名称为NDTest。

删除/取消对DCS条目的分类后，工作正常。

无法连接到db2中的远程数据库

2 个答案: