> ## 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 Server 4.x File Download Links export const LwTemplate = ({title = "Key questions to get you started", icon = "sparkles", cta = "Powered by Agent Studio", linkHref = "https://lucidworks.com/demo/?utm_source=docs&utm_medium=referral&utm_campaign=docs_cta_ai"}) => { const [isLoaded, setIsLoaded] = useState(false); useEffect(() => { const timer = setTimeout(() => { setIsLoaded(true); }, 500); return () => clearTimeout(timer); }, []); return
{isLoaded && ` }} />} Powered by Lucidworks Agent Studio
; }; [localhost link]: http://localhost:3000/docs/4/fusion-server/reference/fusion-server-4-x-file-download-links [mintlify link]: https://doc.lucidworks.com/docs/4/fusion-server/reference/fusion-server-4-x-file-download-links [old doc.lw link]: https://doc.lucidworks.com/fusion-server/4.2/kvgqn7 This section contains download links for the Fusion Server 4.x.x files other than connectors. See [Fusion 4.x V1 Connector Downloads](/docs/fusion-connectors/downloads/fusion-4-x-connector-downloads) to access links to download connectors for the Fusion 4.x releases. ## Fusion application files Select the link to download the Fusion release: | Release | Zip | | ---------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **Fusion 4.0.0** | [fusion-4.0.0.zip](https://download.lucidworks.com/fusion-4.0.0/fusion-4.0.0.zip) | | **Fusion 4.0.1** | [fusion-4.0.1.zip](https://download.lucidworks.com/fusion-4.0.1/fusion-4.0.1.zip) | | **Fusion 4.0.2** | [fusion-4.0.2.zip](https://download.lucidworks.com/fusion-4.0.2/fusion-4.0.2.zip) | | **Fusion 4.1.0** | [fusion-4.1.0.zip](https://download.lucidworks.com/fusion-4.1.0/fusion-4.1.0.zip) | | **Fusion 4.1.1** | [fusion-4.1.1.zip](https://download.lucidworks.com/fusion-4.1.1/fusion-4.1.1.zip) | | **Fusion 4.1.3** | [fusion-4.1.3.zip](https://download.lucidworks.com/fusion-4.1.3/fusion-4.1.3.zip) | | **Fusion 4.2.0** | [fusion-4.2.0.zip](https://download.lucidworks.com/fusion-4.2.0/fusion-4.2.0.zip) | | **Fusion 4.2.1** | [fusion-4.2.1.zip](https://download.lucidworks.com/fusion-4.2.1/fusion-4.2.1.zip) | | **Fusion 4.2.2** | [fusion-4.2.2.zip](https://download.lucidworks.com/fusion-4.2.2/fusion-4.2.2.zip) | | **Fusion 4.2.3** | [fusion-4.2.3.zip](https://download.lucidworks.com/fusion-4.2.3/fusion-4.2.3.zip) | | **Fusion 4.2.4** | [fusion-4.2.4.zip](https://download.lucidworks.com/fusion-4.2.4/fusion-4.2.4.zip) | | **Fusion 4.2.5** | [fusion-4.2.5.zip](https://download.lucidworks.com/fusion-4.2.5/fusion-4.2.5.zip) | | **Fusion 4.2.6** | [fusion-4.2.6.zip](https://download.lucidworks.com/fusion-4.2.6/fusion-4.2.6.zip), Linux: [fusion-4.2.6.tar.gz](https://download.lucidworks.com/fusion-4.2.6/fusion-4.2.6.tar.gz) | ## Fusion 4.2.0 drivers Select the link to download the Fusion driver: | Driver | Zip | | ----------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **chrome-linux** | [chrome-linux.zip](https://download.lucidworks.com/fusion-4.2.0/drivers/chrome-linux.zip) | | **chrome-remote-interface-js-eval-tool-alpine-linux** | [chrome-remote-interface-js-eval-tool-alpine-linux.zip](https://download.lucidworks.com/fusion-4.2.0/drivers/chrome-remote-interface-js-eval-tool-alpine-linux.zip) | | **chrome-remote-interface-js-eval-tool-linux** | [chrome-remote-interface-js-eval-tool-linux.zip](https://download.lucidworks.com/fusion-4.2.0/drivers/chrome-remote-interface-js-eval-tool-linux.zip) | | **chrome-remote-interface-js-eval-tool-macos** | [chrome-remote-interface-js-eval-tool-macos.zip](https://download.lucidworks.com/fusion-4.2.0/drivers/chrome-remote-interface-js-eval-tool-macos.zip) | | **chrome-remote-interface-js-eval-tool-win** | [chrome-remote-interface-js-eval-tool-win.zip](https://download.lucidworks.com/fusion-4.2.0/drivers/chrome-remote-interface-js-eval-tool-win.zip) | | **chromedriver\_linux64** | [chromedriver\_linux64.zip](https://download.lucidworks.com/fusion-4.2.0/drivers/chromedriver_linux64.zip) | | **chromedriver\_mac64** | [chromedriver\_mac64.zip](https://download.lucidworks.com/fusion-4.2.0/drivers/chromedriver_mac64.zip) | | **chromedriver\_win32** | [chromedriver\_win32.zip](https://download.lucidworks.com/fusion-4.2.0/drivers/chromedriver_win32.zip) | | **chromium-nosync** | [chromium-nosync.zip](https://download.lucidworks.com/fusion-4.2.0/drivers/chromium-nosync.zip) | ## Fusion 4.2.6 Service Pack application files Select the link to download the Fusion 4.2.6 Service Pack for your operating system. Before applying service packs, review **Upgrade Fusion Server 4.2.6 to Latest SP**. This article describes how to perform the following upgrade: * From version: 4.2.6 * To version: Latest SP Unlike other Fusion upgrades, 4.2.6 SPs are a patched upgrade that can be applied directly to Fusion 4.2.6. If you are not already using Fusion 4.2.6, complete the upgrade to Fusion 4.2.6 before installing the latest Fusion 4.2.6 SP. You can view the application files to download at [Fusion Server 4.x File Download Links](/docs/4/fusion-server/reference/fusion-server-4-x-file-download-links). This upgrade is available to qualified customers whose Lucidworks plans include extended support. Consult Upgrade to Fusion 4.x for information on upgrading to a different version of Fusion. If you require a fresh installation of a Fusion 4.2.6 SP, consult Install Fusion 4.x. ## Preliminary upgrade steps (optional) If you are upgrading to apply the latest Log4j updates to your existing deployment, please follow the proceeding steps. 1. Log in to the Fusion Admin UI with an administrator account. 2. Select **System** -> **blobs** 3. Open **webapp-admin-war** → **admin-webapps** 4. Delete the `admin.war`, `insights.war`, `app-studio.war` **WAR** by selecting each entry and clicking **Delete Blob**. For more information about blobs, see [Blob Storage](/docs/4/fusion-server/concepts/indexing/blob-storage). ## Upgrade an existing Fusion installation (Linux, Windows) ### Linux To upgrade an existing Fusion installation on Linux: 1. Place the `fusion-4.2.6-service-pack-patch.jar` and `fusion-4.2.6-sp3.tar.gz` on each server hosting Fusion services.\ The script does not update external Solr and Zookeeper installations. 2. Shut down all Fusion services on each server that will receive the patched upgrade. 3. Run the `fusion-4.2.6-service-pack-patch.jar` jar (`java -jar fusion-4.2.6-service-pack-patch.jar`) and follow the prompts. 4. Start the Fusion services. ### Windows To upgrade an existing Fusion installation on Windows: 1. Place the `fusion-4.2.6-service-pack-patch.jar` and `fusion-4.2.6-sp3.zip` on each server hosting Fusion services. The script does not update external Solr and Zookeeper installations. 2. Shut down all Fusion services on each server that will receive the patched upgrade. 3. Run the `fusion-4.2.6-service-pack-patch.jar` jar (`java -jar fusion-4.2.6-service-pack-patch.jar`) and follow the prompts. 4. Start the Fusion services. ## Enable the Tika parser service Fusion 4.2.6 SPs include [an asynchronous Tika parser service](/docs/4/fusion-server/reference/parser-stages/enable-tika-async-parsing). This service is not automatically enabled upon upgrading. To enable the Tika parser service: 1. Open `fusion/conf/fusion.properties` in a text editor. 2. Add the following Tika entry to the end of the file. ```bash theme={"dark"} # Tika parser service tika-server.port = 8889 # If your tika server is properly secured behind a firewall, then you can then set the # -Dtika.server.allowLocalFileOptimization=true to allow you to use the "local file optimization" which reduces # http overhead during local tika parses. tika-server.jvmOptions = -Dtika.MAX_HEAP_MB=1000 -Dtika.NUM_PROCESSES=2 -Dtika.ALLOW_LOCAL_FILE_OPTIMIZATION=true ``` 3. In the `log-shipper` section of the file, add the following in a new line: ```bash theme={"dark"} log-shipper.logs.tika-server = java ``` 4. Save the file. 5. Download the [tika-server-log4j2.xml file](https://storage.googleapis.com/docs-downloads/tika-server-log4j2.xml). 6. Add the TikaServer logging configuration to the `fusion/conf` directory. To automatically start the Tika parser service when starting Fusion, add `tika-server` to the `group.default` line. Otherwise, you can start the Tika parser server with the `$fusion/bin/tika-server` script. | Operating system(s) | Package | | -------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------ | | **Windows Zip archive for new Fusion 4.2.6 SP installations and patch updates.** | [fusion-4.2.6-sp3.zip](https://storage.googleapis.com/docs-downloads/fusion-4.2.6-sp3.zip) | | **Linux archive for new Fusion 4.2.6 SP installations and patch updates** | [fusion-4.2.6-sp3.tar.gz](https://storage.googleapis.com/docs-downloads/fusion-4.2.6-sp3.tar.gz) | | **Linux/Windows patch program** | [fusion-4.2.6-service-pack-patch.jar](https://storage.googleapis.com/docs-downloads/fusion-4.2.6-service-pack-patch.jar) |