EBS 12.2 blank page viewing concurrent out and logs - this time due to a Missing Mandatory Patch

Revisiting this issue, because this is actually a generic one, and it seems there are more than one possible cause for that.

Some of you may remember my blog post (I know it's a little bit challenging. I wrote it in 2017 :) about the problem that appeared when the customer wanted to see the outputs and logs of the concurrent programs. When they tried to open a concurrent log in the browser, a blank page was displayed.

Here is the link for that blog post -> https://ermanarslan.blogspot.com/2017/04/ebs-122-blank-page-problem-viewing.html

In that case, the problem was the hostname.. It was in capital letters.

Note that, the hostname of the EBS servers should not be written in capital letters.  This is not supported and that issue of getting blank page when we try to view the concurrent logs and out, was one of the causes of this support lack. Anyways, details are in the link given above.

However; as I mentioned there may be other causes and one of them revealed in my forum. Thanks to my follower, we identified that and here I'm sharing it.

"Patch 32931976: TECHP:REPACKAGING OF WLS PATCH FOR EBS 12.2 ORACLE E-BUSINESS SUITE ON OL8/RHEL8" is a crucial one and it is mandatory. 

-Reference: Oracle E-Business Suite Installation and Upgrade Notes Release 12 (12.2) for Linux x86-64 (Doc ID 1330701.1)-

So if your are on OEL 8, RHEL 8 or SLES 15, you need that patch.. It is not optional.. And if you don't apply this patch; you will end up with this issue.  In the background, we have the same cause actually.. That is "hostname & capital letters", but in this one; even if your hostname is in lowercase, the issue appears due to the bug  "Bug 32931976 : TECHP:REPACKAGING OF WLS PATCH FOR EBS 12.2 ORACLE E-BUSINESS SUITE ON OL8/RHEL8 "

This is based on a true story and for those who still don't know about my forum; here is the link:

http://ermanarslan.blogspot.com/p/forum.html

Some other notes for the reference (just in case , for future issues in this context) : 

Viewing the Output and Log Files From a Submitted Concurrent Request Shows a Blank Page in the Browser (Doc ID 2914718.1)

Concurrent Request Report Log And Output Result In A Blank Page In Browser (Doc ID 1630055.1)

Blank page when trying to View Request Output or Log (Doc ID 2177504.1)

How to Troubleshoot FNDFS and FNDWRR (Problems Viewing Concurrent Request Output) (Doc ID 847844.1)

Unable to Access Log And Out Files from the Concurrent Request View And Output Buttons After Patching Using Dynatrace (Doc ID 2755839.1)