WebSphere Portal Installation and host short name length

To avoid errors during the WebSphere® Portal PTF installation, you must ensure that, before you install DB2 Universal Database™, you limit the host short name to eight characters.

If you need to change the host short name, you must change it, reboot the machine, and then install DB2®.

Using longer host short names has caused the following exception during the installation of WebSphere Portal install: java.io.IOException.. The system cannot find the specified file or the file name is too long. The WebSphere Application Server profile creation uses the following names to create a profile: profile name, host short name, cell name, node name and profile root directory.

Limiting the length of these names keeps the directory path for the profile under the Microsoft® limit of 256 characters in a fully qualified path. DB2 uses the host name during its configuration. If the host name is changed after DB2 is installed, you will get the following error when you try to run any DB2 commands: SQL6031N Error in the db2nodes.cfg file at line number "1". Reason code "10".


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