Accessing Discoverer Plus 10g/11g Via An F5 BigIP Load Balancer The Applet Fails With 'load: class oracle.disco.DiscoApplet not found' (Doc ID 566528.1)

Last updated on MAY 22, 2017

Applies to:

Oracle Discoverer - Version 10.1.2.0.0 to 11.1.1.7.0 [Release 9.0.4 to 11g]
Information in this document applies to any platform.
***Checked for relevance on 27-Sep-2013***


Symptoms

When accessing Discoverer Plus configured to use the client-side Sun java plug-in (JRE/JVM) version 1.5.0_xx or 1.6.0_xx, via an F5 BigIP hardware load balancer/ssl accelerator, the Discoverer applet fails to load with the following error:

load: class oracle.disco.DiscoApplet not found.
java.lang.ClassNotFoundException: oracle.disco.DiscoApplet
at sun.applet.AppletClassLoader.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)
Caused by: 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)
... 10 more
basic: Exception: java.lang.ClassNotFoundException: oracle.disco.DiscoApplet
java.lang.ClassNotFoundException: oracle.disco.DiscoApplet
at sun.applet.AppletClassLoader.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)
Caused by: 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)
... 10 more

 


Additional symptoms:

Cause

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