Troubleshooting of Oracle Database creation errors

An Oracle database creation error cannot be rectified by allocating ports to the following processes within the specified range.

Install the Oracle database a few days ago. Configure the Linux environment, install rpm, install the 10.2.0.1 installation package, install the 10.2.0.4 patch, and then install the em patch. By now, I started to use dbca to create a database. The error message is as follows:

1

Severe: unable to allocate ports to the following processes within the specified range: JMS [5540-5559], RMI [5520-5539], Database Control [5500-5519], EM Agent [3938] | [1830-1849]

2

For more information, see log files in/home/oracle/app/oracle/product/10.2.0/db_1/export toollogs/dbca/orcl/emConfig. log.

This is the first time that you encounter this situation. Netstat has been used for a long time and no problem is found. The whole system is not installed with the port segment 5000.

I went to the Internet to find the answer. All the results were found because of an error in the emca configuration. However, I reported an error in deleting the configuration according to the E-mapreduce command I wrote online. In addition, It is also found that not only does em fail to be created, but lsnrctl status is executed, and the listener is also incorrect. The host is empty, and the status itself cannot be stopped. This suspicion is irrelevant to em, but an earlier issue.

At last, there was no difference. From the beginning, the configuration files were compared with the installation manual and the installed server. Finally, we found that there was a problem with the hosts of the new Linux server. 127.0.0.1 had no host name for the server except for the localhost.

After modifying the hosts file, run dbca again.

This installation of the database was misled by logs and online information. I would like to share with you the hope that you will avoid detours when installing Oracle.