> ## 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 5.9.1

[localhost link]: http://localhost:3000/docs/5/fusion/release-notes/5.9.1-release-notes

[mintlify link]: https://doc.lucidworks.com/docs/5/fusion/release-notes/5.9.1-release-notes

[old doc.lw link]: https://doc.lucidworks.com/fusion/5.9/ht2sax

Released on September 5, 2023, this [maintenance release](/docs/policies/lifecycle-policies/lw-version-support-lifecycle#maintenance-release-support-policy) includes corrections to remote connectors, the JDBC V2 connector, and LDAP ACL documents.

To learn more, skip to the [release notes](#bug-fixes).

## Platform Support and Component Versions

### Kubernetes platform support

Lucidworks has tested and validated support for the following Kubernetes platforms and versions:

* **Google Kubernetes Engine (GKE):** 1.25 and 1.26
* **Microsoft Azure Kubernetes Service (AKS):** 1.25 and 1.26
* **Amazon Elastic Kubernetes Service (EKS):** 1.25 and 1.26

Support is also offered for Rancher Kubernetes Engine (RKE) and OpenShift 4 versions that are based on Kubernetes 1.25 and 1.26. OpenStack and customized Kubernetes installations are *not* supported.

For more information on Kubernetes version support, see the [Kubernetes support policy](/docs/policies/lifecycle-policies/lw-version-support-lifecycle#kubernetes-support).

<a name="rel-notes" />

### Component versions

The following table details the versions of key components that may be critical to deployments and upgrades.

| Component               | Version                                                                 |
| ----------------------- | ----------------------------------------------------------------------- |
| **Solr**                | fusion-solr 5.9.1  *(based on Solr 9.1.1)*                              |
| **ZooKeeper**           | 3.7.1                                                                   |
| **Spark**               | 3.2.2                                                                   |
| **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>

## Bug Fixes

### Fusion Connectors

* Fixed an issue to make gRPC max outbound message size configurable to prevent remote connectors from failing on large field sizes.

* Fixed an issue where a restart was required when the remote JDBC V2 connector timed out and did not restart correctly.

* Fixed an issue where the JDBC V2 connector failed to index data.

* Fixed an issue where the Connectors SDK delete-by-query that contains a NOT-EQUAL phrase did not delete the appropriate documents.

* Fixed an issue where the outbound access control list (ACL) object contained a reference to itself in the `outbound_ss` field by default. The plug-in that creates the ACL should enter that reference explicitly only when required.

* Fixed an issue where the connectors-backend service did not add the following fields by default to the LDAP ACL documents: `_lw_data_source_type_s`, `_lw_batch_id_s`, `_lw_data_source_collection_s`, and `_lw_block_start_time_l`. These fields are required by the LDAP plug-in to keep the list of ACL objects up-to-date.

## Known issues

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