Discoverer Plus Generate "java.io.FileNotFoundException:disco5i.jar" after Cumulative Patch 7 (6778560) installation

Discoverer Plus 10.1.2.54.25 generate the following exception in Java Console, and cannot be loaded :

java.io.FileNotFoundException: File not found:
https://servername.domain/discoverer_disco/plus_files/disco5i.jar
at sun.plugin.proto .jdk12.http.HttpURLConnection.getInputStream(Unknown Source)
at oracle.jre.protocol.jar.HttpUtils.followRedirects(Unknown Source)
at oracle.jre.protocol.jar.JarCache$CachedJarLoader.download(Unknown Source)
at oracle.jre.protocol.jar.JarCache$CachedJarLoader.load(Unknown Source)
at oracle.jre.protocol.jar.JarCache.get(Unknown Source)
at oracle.jre.protocol.jar.CachedJarURLConnection.connect(Unknown Source)
at oracle.jre.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.(Unknown Source)
at sun.misc.URLClassPath$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getResource(Unknown Source)
at sun.misc.URLClassPath.getResource(Unknown Source)
at sun.applet.AppletPanel.loadJarFiles(Unknown Source)
at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
WARNING: Unable to cache
https://appsppesdev.oracleoutsourcing.com/discoverer_disco/plus_files/disco5i.jar
Could not load progress dialog image:
https://appsppesdev.oracleoutsourcing.com/discoverer_disco/plus_files/plugin/images/download.jpg
load: class oracle.disco.DiscoApplet not found.
java.lang.ClassNotFoundException: java.io.IOException: open HTTP connection failed.
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

The error_log files, shows errors like :

[error] [client 140.85.190.243] [ecid: 82133192743,1] File does not exist: $OH/Apache/Apache/htdocs/disco/discoverer_disco/plus_files/disco5i.jar

Changes

The problem appeared after the installation of the Cumulative Patch 7 on a Complex / Load Balanced environment, with BigIP and security rules.

Cause

Due to the

Bug 5948646 NEED TO CHANGE THE CONTEXTROOT FOR DISCOVERER PLUS&VIEWER

the $OH/discoverer/config/disco.conf has been updated from :

# Virtual path for plus jar and related files
AliasMatch ^/disco/plus_files/(..*)
"$OH/discoverer/plus_files/$1"

to :

# Virtual path for plus jar and related files
AliasMatch ^/discoverer_disco/plus_files/(..*)
"$OH/discoverer/plus_files/$1"

Solution

Change the BigIP security rules for the Virtual Path from /disco/ to /discoverer_disco/