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parmida.borhani
parmida.borhani
Employee
February 9, 2018

KB-1491 500 errors in WebLogic access logs accompanied by end user blank screens

Symptoms

Users experience blank pages that never load in Tempo. If the page is refreshed or the tab/window is closed and reopened, the page is no longer blank. 

When the issue occurs, errors similar to the following 500 errors are printed in the WebLogic server access logs:

172.24.164.20 - - [01/Feb/2018:13:17:25 +0000] "POST /enterprise_bpm/rest/a/task/latest/145337/form HTTP/1.1" 500 104 
172.26.121.159 - - [01/Feb/2018:14:20:13 +0000] "POST /enterprise_bpm/rest/a/uicontainer/latest/wJV9zQ/view HTTP/1.1" 500 104 
172.26.121.159 - - [01/Feb/2018:14:20:18 +0000] "POST /enterprise_bpm/rest/a/uicontainer/latest/wJV9zQ/view HTTP/1.1" 500 104 
172.24.164.20 - - [01/Feb/2018:16:12:59 +0000] "POST /enterprise_bpm/rest/a/model/latest/2279/form HTTP/1.1" 500 104

Cause

The issue is with the Apache mod_wl plugin. Oracle has acknowledged that there are issues with version 12.2.1.1 of the plugin. 

Action

Revert to a previous stable version of the mod_wl plugin (12.1.2). Alternatively, use a newer, patched version (12.2.1.2 and later).

Affected Versions

This article affects versions 17.2 and later.

Last Reviewed: February 2018

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