关于emctl报OC4J issue的解决

最新推荐文章于 2021-04-07 08:50:59 发布

转载最新推荐文章于 2021-04-07 08:50:59 发布 · 185 阅读

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本文探讨了在Oracle Enterprise Manager 10g环境中遇到的OC4J配置问题，特别是当主机名变化导致IP地址解析错误时，无法正确启动dbconsole的问题。文章提供了详细的故障原因分析及解决方案，包括如何通过配置DNS或localhosts文件来解决此问题。

相信10g,emctl在给很多DBA带来很大便利的同时，也给我们带来了一些困扰。在这其中，OC4J issue应该算是一个常见的问题。就我个人而言，遇到过已经不止一次，这包括单机环境，RAC环境等。

今天查找资料，便作总结：

原因：是由于主机名发生变化，导致IP地址解析不能够返回正确的hostname

详见下文解释：

The information in this document applies to:
Enterprise Manager for RDBMS - Version: 10.1.0.3
This problem can occur on any platform.

Symptoms
Getting the following error when starting dbconsole:

$ emctl start dbconsole
OC4J Configuration issue.
/u01/app/oracle/product/10.1.0/db10g/oc4j/j2ee/OC4J_DBConsole_5 [main] WAR
N emSDK.config - Exception in getting local host
java.net.UnknownHostException:
at java.net.InetAddress.getLocalHost(InetAddress.java:1199)
at
oracle.sysman.emSDK.conf.TargetInstaller.getLocalHost(TargetInstaller.java:4790)
at
oracle.sysman.emSDK.conf.TargetInstaller.main(TargetInstaller.java:3767)
null_altpmp1 not found.

Cause
A reverse lookup using the ip address of the server does not return the correct hostname.

If it is not possible to resolve the ip address of the server, dbconsole will not start.

Solution
To implement the solution, please execute the following steps:

1.Configure DNS (or local hosts file) to allow the ip address of the server to resolve to the hostname of the server
2. Start the dbconsole using:

/bin/emctl start dbconsole