Websphere8.5通过addNode命名往集群添加节点时出现ADMU0036E异常解决
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.61.214 UAPTEST-WEB1-214.chinaclear.com192.168.61.215 UAPTEST-WEB2-215.chinaclear.com
?主机UAPTEST-WEB2-215.chinaclear.com的/etc/hosts配置如下：
127.0.0.1 UAPTEST-WEB2-215.chinaclear.com localhost localhost.localdomain localhost4 localhost4.localdomain4::1 UAPTEST-WEB2-215.chinaclear.com localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.61.214 UAPTEST-WEB1-214.chinaclear.com192.168.61.215 UAPTEST-WEB2-215.chinaclear.com
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主机UAPTEST-WEB1-214.chinaclear.com上面创建DMGR管理节点，启动正常，相关端口详细信息如下：
[root@UAPTEST-WEB1-214 classes]# cat /opt/IBM/WebSphere/AppServer/profiles/Dmgr01/logs/AboutThisProfile.txt Application server environment to create: ManagementLocation: /opt/IBM/WebSphere/AppServer/profiles/Dmgr01Disk space required: 30 MBProfile name: Dmgr01Make this profile the default: TrueNode name: UAPTEST-WEB1-214CellManager01Cell name: UAPTEST-WEB1-214Cell01Host name: UAPTEST-WEB1-214.chinaclear.comEnable administrative security (recommended): TrueAdministrative console port: 9060Administrative console secure port: 9043Management bootstrap port: 9809Management SOAP connector port: 8879Run Management as a service: False
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在主机UAPTEST-WEB2-215.chinaclear.com上面使用addNode命令添加集群节点：
[root@UAPTEST-WEB2-215 AppSrv01]# pwd/opt/IBM/WebSphere/AppServer/profiles/AppSrv01[root@UAPTEST-WEB2-215 AppSrv01]# ./bin/addNode.sh UAPTEST-WEB1-214.chinaclear.com 8879 -username admin
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出现下述错误：
ADMU0036E: The Deployment Manager cannot lookup by name host UAPTEST-WEB2-215.chinaclear.com at address 127.0.0.1
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分析提示就是说DM通过DNS找不到要添加的Node节点主机名，仔细检查了一下两台主机的hosts配置，都没发现问题，而且两台主机互相可以ping通，主机UAPTEST-WEB1-214.chinaclear.com的8879端口也是可以telnet通的，通过查找相关资料，才找到了问题的解决方法，比较官方的解释如下：
Note: The default Red Hat installation creates an association between the hostname of the machine and the loopback address -- 127.0.0.1. In addition, the /etc/nsswitch.conf file is set up to use /etc/hosts before trying to look up the server using a name server. This can cause failures when trying to add or administrate nodes when the deployment manager or application server is running on Red Hat.?
If your deployment manager or your application server is running on Red Hat, perform the following operations on your Red Hat machines to ensure that you can successfully add and administrate nodes:?
1Remove the 127.0.0.1 mapping to the local host in /etc/hosts?
2Edit /etc/nsswitch.conf so that the hosts line reads:
hosts: ? ? ? ? dns files
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最后的解决办法是在使用addNode命令之前，修改两台主机的/etc/hosts配置文件，都注释掉包含127.0.0.1的整个条目，例如，主机UAPTEST-WEB1-214.chinaclear.com的/etc/hosts配置修改成如下：
#127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4#::1 localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.61.214 UAPTEST-WEB1-214.chinaclear.com192.168.61.215 UAPTEST-WEB2-215.chinaclear.com
?同理，修改UAPTEST-WEB2-215.chinaclear.com的/etc/hosts配置
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?最后别忘了，添加完节点之后，改回/etc/hosts配置，否则会影响SSH图形界面登录等等
