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/

Exception "oracle.bali.ewt.spinBox.NumericSpinBoxModel.setValue" on Discoverer Plus 10.1.2

On top of Discoverer Plus 10.1.2, some actions (like right click on Worksheet Name =>
Properties ; Tools => Options ) cannot be performed because of the following exception is returned in the java console :

Error: java.lang.IllegalArgumentException java.lang.IllegalArgumentException
at oracle.bali.ewt.spinBox.NumericSpinBoxModel.setValue(Unknown Source)
at oracle.bali.ewt.spinBox.NumericSpinBox.setIntValue(Unknown Source)
at oracle.disco.options.QueryPanel._setInitialValues(Unknown Source)
at oracle.disco.options.QueryPanel.(Unknown Source)
at oracle.disco.options.OptionsPanel._initMainPanel(Unknown Source)
at oracle.disco.options.OptionsPanel.(Unknown Source)
at oracle.disco.options.OptionsUI.runDiscoWorker(Unknown Source)
at oracle.disco.worker.DiscoWorker.runWorker(Unknown Source)
at oracle.bali.ewt.worker.AbstractWorker.run(Unknown Source)
at oracle.bali.ewt.worker.AbstractWorkerQueue._runWorker(Unknown Source)
at oracle.bali.ewt.worker.AbstractWorkerQueue.access$100(Unknown Source)
at oracle.bali.ewt.worker.AbstractWorkerQueue$WorkerContext._run(Unknown Source)
at oracle.bali.ewt.worker.AbstractWorkerQueue$WorkerContext._runMaybeBlocked(Unknown Source)
at oracle.bali.ewt.worker.AbstractWorkerQueue$WorkerContext.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

-- Steps To Reproduce:
1.) Open Discoverer Plus and Create new Workbook ;
2.) Try to right click on worksheet name => Properties
3.) Exception displayed in the Java Console

Cause

The preference "RowFetchLimit" has been set to "0" in the pref.txt file

Although this parameter is of no sense, since the preference "RowFetchLimitEnabled" is disabled
(=0) in the pref.txt file, we cannot set preferences to not allowed values.

This can occurs with any preference value in the pref.txt set outside the range, which can be retrieved from the pref.txt comments.

Solution

1.) Stop Application Server (opmnctl stopall) ;
2.) [Only for Unix Platform] Set the environment for discoverer ( $ . ./discwb.sh DOT SPACE DOT SLASH discwb.sh) ;
3.) Edit pref.txt and set RowFetchLimit = 1 - then save the file ;
4.) Apply the new preference ( Unix: $ applypreferences.sh ; Windows : c:\> applypreferences.bat) ;
5.) Restart the Application Server (opmnctl startall).