> ## 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 4.2.6 SP3 Release Notes

[localhost link]: http://localhost:3000/docs/4/fusion-server/release-notes/4.2.6-sp3-release-notes

[mintlify link]: https://doc.lucidworks.com/docs/4/fusion-server/release-notes/4.2.6-sp3-release-notes

[old doc.lw link]: https://doc.lucidworks.com/fusion-server/4.2/jkd2eg

**Release date:** 27 June 2022

**Component versions:**

|                                     |                  |             |                        |              |              |
| ----------------------------------- | ---------------- | ----------- | ---------------------- | ------------ | ------------ |
| Solr 7.7.3  See Solr updates below. | ZooKeeper 3.4.13 | Spark 2.3.2 | Jetty 9.4.35.v20201120 | Ignite 2.6.0 | Log4j 2.17.1 |

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

<Tip>
  **Looking for download links?**

  Check out the [Fusion 4.2.6 Service Pack application files](/docs/4/fusion-server/reference/fusion-server-4-x-file-download-links#fusion-4-2-6-service-pack-application-files).
</Tip>

## Improvements

### Log4j

* Insights and App Studio log4j2.17.2 upgraded.
* Removed `log4j-1.2.17.jar` from Spark library.
* Removed log4j1.*x* `JMSAppender` and `SocketServer` classes from `apps/libs/hive-jddc-shaded.jar`.

## Bug fixes

* Fixed asynchronous Tika metadata parsing.