Why do we need write access to Java installation Directory

We are Upgrading from Siebel Analytics 7.8 to OBIEE 10.1.3.4.
As OBIEE needs Java 1.5 or higher as a pre-requisite we are planning to uninstall Java 1.4 and install latest version of Java 1.5.
According to OBI Installation and Configuration Guide http://download.oracle.com/docs/cd/E10415_01/doc/bi.1013/b31765.pdf -> Page 39 "If you are installing using the Basic installation type, make the user or user group permissions
writable for the user installing Oracle Business Intelligence, for all JDK 1.5.0 installation directories,
subdirectories, and files". Can anybody let me know why we need write access to Java Installation Directory??
Thanks,
Chandra
Edited by: user6086408 on Apr 5, 2010 3:07 PM

I had this same question and asked Oracle. Here's what I was told:
Per Dev:
"For OBI Presentation Services and OBI Publisher, jdk fonts files are copied into the JDK location because we do not bundle our own JDK. To ensure the install can do this you need to ensure that the Oracle BI installer has permissions to copy files to the specified JDK location.
This means that if the same user who installer/untarred JDK is also installing Oracle BI, the install should work. In this case the the permissions of the JDK is probably 755.
It will not work if a root user installs JDK and a normal user installs Oracle BI because the normal user does not have access to write to the JDK location or will not work if the JDK location is read-only, i.e. 444. In this case running chmod -R 777 will work."
Jerry

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