ClassCastException and IndexOutOfBoundException

[NamNVH]

1. Create a custom component

@FacesComponent(createTag = true, tagName = "inputHidden", namespace = "http://mytaglib/tags", value = "myInputHidden")
public class MyInputHidden extends HtmlInputHidden implements Serializable {


    private static final long serialVersionUID = 5173135479509877319L;

    @Override
    public Object getSubmittedValue() {
        if (super.getSubmittedValue() == null && !isValid() && MyCommonTag.considerEmptyStringNull(FacesContext.getCurrentInstance())) {
            return "";
        } else {
            return super.getSubmittedValue();
        }
    }


}

2. Use it on xhtml

<my:inputHidden value="#{MyController.backFlg}"/>

MyController is @Viewscoped.

3. Environment

Payara server 163

JDK Version: 1.8.0_112

Hazelcast enabled

10 Application servers.

4. Problem

I noticed that in server.log, these two exceptions appeared many times:

• javax.faces.FacesException: Unexpected error restoring state for component with id products:j_idt1352.  Cause: java.lang.ClassCastException: com.sun.faces.facelets.el.TagMethodExpression cannot be cast to [Ljava.lang.Object;."
  
• javax.faces.FacesException: Unexpected error restoring state for component with id j_idt30.  Cause: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0."
  

5. Question

Is there any relation between the above code and these 2 exceptions?

If not, is there any cause for these exceptions?

It's a great help if you can show me how to reproduce these exceptions since they seem to appear randomly.

[Ondro Mihályi]

Hi,

Have you tried the same code with the latest Payara 4.1.2.181 and/or Payara 5.182? If it's a bug it might be already fixed.

Ondro

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