> ## 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 5.5.2

[localhost link]: http://localhost:3000/docs/5/fusion/release-notes/5.5.2-release-notes

[mintlify link]: https://doc.lucidworks.com/docs/5/fusion/release-notes/5.5.2-release-notes

[old doc.lw link]: https://doc.lucidworks.com/fusion/5.9/k63wv1

**Release date:** May 31, 2022

**Component versions:**

| Component               | Version                                                                                                                                                                                                                                                                               |
| ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Solr**                | 8.11.1                                                                                                                                                                                                                                                                                |
| **ZooKeeper**           | 3.6.2                                                                                                                                                                                                                                                                                 |
| **Spark**               | 3.2.1                                                                                                                                                                                                                                                                                 |
| **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>

## Improvements

* The Spark version has been updated to 3.2.1. See [Spark Overview](https://spark.apache.org/docs/latest/) for more information.

## Bug Fixes

* Fixed an issue that caused the [**click\_signals\_aggregation**](/docs/5/fusion/reference/config-ref/jobs/aggregations/overview) job to fail with a "Driver JVM" error.

* Fixed an issue that caused containers to crash when an Argo-based job failed to list the job status.

## Known Issues

* A bug was discovered in the Spark 3.2.x component that prevents signal aggregation for signals stored in the cloud in Parquet format. For more information about the issue, see the [Spark bug report](https://issues.apache.org/jira/browse/SPARK-38318).

  <Note>
    This issue is fixed in Fusion 5.7.1.
  </Note>

## Removals

<Warning>
  The following features and functionalities are removed from default deployment in Fusion 5.5.2. See [Deprecations and Removals](/docs/5/fusion/deprecations-and-removals) for more information about suggested replacements:
</Warning>

* Jupyter
* Superset

## Known issues

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