今天上午，在测试环境下手动的安装了一个DB2 V9.7，设置完SVCENAME后，然后使用clpplus连接报以下错误：
[db2inst1@lstest ~]$ clpplus db2inst1/db2@192.168.100.228:60000/sde
[jcc][t4][2043][11550][3.58.82] 异常 java.net.ConnectException：打开端口 60,000 上服务器 /192.168.100.228
的套接字时出错，消息为：拒绝连接。 ERRORCODE=-4499, SQLSTATE
=08001
从错误上看应该是60000端口有问题，
接着使用netstat 命令查看DB2的db2sysc是否在监听60000端口，结果如下：
netstat -lnp|grep 60000
没有任何返回，重启DB2的实例，依旧，此时接着查看DB2内部的db2tcpcm是否启动，
结果如下：
[db2inst1@lstest ~]$ db2pd -edu
Database Partition 0 -- Active -- Up 0 days 00:21:54
List of all EDUs for database partition 0
db2sysc PID: 27228
db2wdog PID: 27226
db2acd PID: 27239
EDU ID TID Kernel TID EDU Name USR (s) SYS (s)
========================================================================================================================================
16 47112997824832 27492 db2agent (idle) 0 0.010000 0.000000
15 47113002019136 27237 db2resync 0 0.000000 0.000000
14 47113006213440 27236 db2ipccm 0 0.000000 0.000000
13 47113010407744 27235 db2licc 0 0.000000 0.000000
12 47113014602048 27234 db2thcln 0 0.000000 0.000000
11 47113018796352 27233 db2alarm 0 0.000000 0.000000
1 47112758749504 27232 db2sysc 0 0.070000 0.090000
[db2inst1@lstest ~]$
没有发现db2tcpcm的edu，只发现了db2ipccm这个edu，此时才找到问题，估计是没有设置DB2的通讯协议环境变量，使用db2set结果如下：
[db2inst1@lstest ~]$ db2set
DB2AUTOSTART=YES
果然没有设置通讯协议的环境变量，接下来设置TCPCOMM为tcpip
[db2inst1@lstest ~]$ db2set DB2COMM=tcpip
[db2inst1@lstest ~]$ db2set
DB2COMM=tcpip
DB2AUTOSTART=YES
[db2inst1@lstest ~]$ db2stop
2010-12-28 14:58:30 0 0 SQL1064N DB2STOP processing was successful.
SQL1064N DB2STOP processing was successful.
[db2inst1@lstest ~]$ db2start
12/28/2010 14:58:36 0 0 SQL1063N DB2START processing was successful.
SQL1063N DB2START processing was successful.
[db2inst1@lstest ~]$ netstat -lnp|grep 60000
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all .)
tcp 0 0 0.0.0.0:60000 0.0.0.0:* LISTEN 28505/db2sysc 0
[db2inst1@lstest ~]$ db2pd -edu
Database Partition 0 -- Active -- Up 0 days 00:00:57
List of all EDUs for database partition 0
db2sysc PID: 28505
db2wdog PID: 28503
db2acd PID: 28520
EDU ID TID Kernel TID EDU Name USR (s) SYS (s)
========================================================================================================================================
19 47304052566336 28518 db2spmlw 0 0.000000 0.000000
18 47304056760640 28517 db2spmrsy 0 0.000000 0.030000
17 47304060954944 28516 db2resync 0 0.000000 0.000000
16 47304065149248 28515 db2tcpcm 0 0.000000 0.000000
15 47304069343552 28514 db2tcpcm 0 0.000000 0.000000
14 47304073537856 28513 db2ipccm 0 0.000000 0.000000
13 47304077732160 28512 db2licc 0 0.000000 0.000000
12 47304081926464 28511 db2thcln 0 0.000000 0.000000
11 47304086120768 28510 db2alarm 0 0.000000 0.000000
1 47303826073920 28509 db2sysc 0 0.020000 0.010000
此时已经包括了两个db2tcpcm进程了。
使用clpplus后可以顺利连接，
[db2inst1@lstest ~]$ clpplus db2inst1/db2@192.168.100.228:60000/sde
数据库连接信息
主机名 = 192.168.100.228
数据库服务器 = DB2/LINUXX8664 SQL09071
SQL
授权标识 = db2inst1
本地数据库别名 = SDE
端口 = 60000
CLPPlus: 版本 1.1
Copyright © 2009, IBM CORPORATION. All
rights reserved.
至此全部搞定。