> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fusion 5.5.1

[localhost link]: http://localhost:3000/docs/5/fusion/release-notes/5.5.1-release-notes

[mintlify link]: https://doc.lucidworks.com/docs/5/fusion/release-notes/5.5.1-release-notes

[old doc.lw link]: https://doc.lucidworks.com/fusion/5.9/drg5sz

**Release date:** April 13, 2022

**Component versions:**

| Component               | Version                                                                                                                                                                                                                                                                               |
| ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Solr**                | 8.11.1                                                                                                                                                                                                                                                                                |
| **ZooKeeper**           | 3.6.2                                                                                                                                                                                                                                                                                 |
| **Spark**               | 2.4.5                                                                                                                                                                                                                                                                                 |
| **Kubernetes**          | GKE, AKS, EKS 1.22  Rancher (RKE) and OpenShift 4 compatible with Kubernetes 1.22  OpenStack and customized Kubernetes installs not supported.  See [Kubernetes support](/docs/policies/lifecycle-policies/lw-version-support-lifecycle#kubernetes-support) for end of support dates. |
| **Ingress Controllers** | Nginx, Ambassador (Envoy), GKE Ingress Controller  Istio not supported.                                                                                                                                                                                                               |

More information about support dates can be found at [Lucidworks Fusion Product Lifecycle](/docs/policies/lifecycle-policies/lw-version-support-lifecycle).

<Tip>
  **Looking to upgrade?**

  See [Fusion 5 Upgrades](/docs/5/fusion/operations/fusion-5-upgrades) for detailed instructions.
</Tip>

## New features

* Merchandisers can now curate the metadata content of their pages with the **Page Metadata** feature in Predictive Merchandiser. See [Page Metadata](/docs/5/fusion/getting-data-out/curating-your-search-experience/predictive-merchandiser/page-metadata) for more information.

## Improvements

### Fusion

* Added titles for Superset and Superset Proxy in the Fusion API **Microservices** dropdown menu.

* Improved logging from client-side retries, to make debugging `retry` jobs easier.

* Streamlined the **System** to remove redundant entries.

### Predictive Merchandiser

* A script has been created to address the [`solrconfig.xml` workaround](/docs/5/fusion/release-notes/more/5.5.0-release-notes) listed in the Fusion 5.5.0 release notes, where users were directed to change their cache classes to `solr.search.CaffeineCache`. See the [Fusion 5 Migration Guide](https://github.com/lucidworks/fusion-cloud-native/tree/master/migrations#migration-from-fusion-5-4-x-to-5-5-x) for more information.

## Bug Fixes

### Fusion

* Fixed an issue that caused the [Tika Parser](/docs/5/fusion/reference/config-ref/parser-stages/apache-tika-parser) to generate "out of memory" errors.

### Predictive Merchandiser

* Fixed an issue that caused images to not display in Predictive Merchandiser results and product details.

* Fixed an issue that caused the interface of the Create a facet console to display incorrectly after adding a new facet field.

* Fixed several UI issues that caused the Publish Rules dropdown to display incorrectly.

## Known issues

* New Kerberos security realms cannot be configured successfully in this version of Fusion.