gwc-distributed plugin (Hazelcast) breaks "Caching Defaults" tab in Geoserver GUI

Description

After installing gwc-distributed plugin and enabling Hazelcast In-memory cache, any subseqent attempts to open a tab "Tile Caching/Caching Defaults" result in error:

Oops, something went wrong...

org.apache.wicket.WicketRuntimeException: Exception in rendering component: [DropDownChoice [Component id = policy]] at org.apache.wicket.Component.internalRenderComponent(Component.java:2625) at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1668) at org.apache.wicket.Component.internalRender(Component.java:2401)
...
Caused by: java.lang.NullPointerException: List of choices is null - Was the supplied 'Choices' model empty? at org.apache.wicket.markup.html.form.AbstractChoice.getChoices(AbstractChoice.java:233)
...

Environment

Ubuntu 16.04 LTS

Assignee

Unassigned

Reporter

Maciej Filocha

Triage

None

Fix versions

None

Affects versions

Components

Priority

Medium
Configure