= Infinispan default XML configuration location

Previous releases ignored any change  to `conf/cache-ispn.xml` if the `--cache-config-file` option was not provided.

Starting from this release, when `--cache-config-file` is not set, the default Infinispan XML configuration file is `conf/cache-ispn.xml` as this is both the expected behavior and the implied behavior given the docs of the current and previous releases.

= Embedded Infinispan: `work` cache must be replicated

The embedded `work` cache needs to be configured as a `replicated-cache` for cache invalidation to work as expected.

Starting from this release, {project_name} check this at startup and will fail to start if it is not configured as such.

= Deprecated APIs for JavaScript Authorization client

The following APIs for the JavaScript Authorization client are deprecated and will be removed in the next major release:

- The `ready` property on the `KeycloakAuthorization` instance.
- The `init()` method on the `KeycloakAuthorization` instance.

These APIs are no longer needed as initialization is done automatically on demand when calling methods on the `KeycloakAuthorization` instance. You can safely remove any code that depends on these APIs.

= Virtual Threads enabled for Infinispan and JGroups thread pools

Starting from this release, {project_name} automatically enables the virtual thread pool support in both the embedded Infinispan and JGroups  when running on OpenJDK 21.
This removes the need to configure the thread pool and reduces overall memory footprint.
To disable the virtual threads, add one of the Java system properties combinations to your deployment:

* `-Dorg.infinispan.threads.virtual=false`: disables virtual thread in both Infinispan and JGroups.
* `-Djgroups.thread.virtual=false`: disables virtual threads only in JGroups.
* `-Dorg.infinispan.threads.virtual=false -Djgroups.thread.virtual=true`: disables virtual threads only in Infinispan.

= Default transport stack changed to JDBC_PING2 for distributed caches

Previous versions of {project_name} used as a default UDP multicast to discover other nodes to form a cluster and to synchronize the replicated caches of {project_name}.
This required multicast to be available and to be configured correctly, which is usually not the case in cloud environments.

Starting with this version, the default changes to a configuration of JDBC_PING2 which uses {project_name}'s database to discover other nodes.
As this removes the need for multicast network capabilities, this is a simplification and a drop-in replacement.

To enable the previous behavior, choose the transport stack `udp`.

The {project_name} Operator will continue to configure `kubernetes` as a transport stack.

= Defining dependencies between provider factories

When developing extensions for {project_name}, developers can now specify dependencies between provider factories classes by implementing the method `dependsOn()` in the `ProviderFactory` interface.
See the Javadoc for a detailed description.

= Removal of robots.txt file

The `robots.txt` file, previously included by default, is now removed. The default `robots.txt` file blocked all crawling, which prevented the `noindex`/`nofollow` directives from being followed. The desired default behaviour is for {project_name} pages to not show up in search engine results and this is accomplished by the existing `X-Robots-Tag` header, which is set to `none` by default. The value of this header can be overidden per-realm if a different behaviour is needed.