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Dealing With java.util.ConcurrentModificationException in an ADF Application (Doc ID 2719187.1)

Last updated on OCTOBER 13, 2020

Applies to:

Oracle JDeveloper - Version 12.2.1.3.0 and later
Information in this document applies to any platform.

Goal

An ADF 12.2.1.3.0 application shows this error in the logs:

[2020-09-11T08:10:21.217+00:00] [...] [WARNING] [ADF_FACES-00009] [oracle.adf.view.rich.component.fragment.UIXRegion] [tid: 130] [userId: ] [...] Error processing viewId: /<PAGE>.jspx URI: /<PAGE>.jspx actual-URI: /<FRAGMENT>.jsff.[[
java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:911)
        at java.util.ArrayList$Itr.next(ArrayList.java:861)
        at org.apache.myfaces.trinidad.render.CoreRenderer.encodeAllChildren(CoreRenderer.java:673)

What is the cause for this error?
 

Solution

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