Your farmerswife (fw) system needs to be upgraded and running on version 6.5 or later in order to use "OpenJDK" instead of "Java (Oracle)".
Java only needs to be installed on the fw Server app host machine; it is used by the built-in web server and powers the Web Client and Mobile Web Client (and fw Play if licensed).
Since the Release of farmerswife v6.8 you need to run at least OpenJDK v11 on the fw Server app's host machine if hosted on macOS and on Windows; and Linux you need to run v11 since v7.0, in order for the Web Client and Mobile Web Client (and fwplay if licensed) to work.
Any 7.1 Beta installer since 701_B05_NightlyBuild_2024-05-07T08-31Z requires Java / OpenJDK v17 to be installed!
IMPORTANT: The v7.0 SP4 fw Server apps on macOS, Windows and Linux will also work with Java 17!
IMPORTANT: There are multiple different versions of Java available!
Only use the latest "Hotspot" version.
IMPORTANT: Do not use higher Java versions than 17 LTS; since by design they have proven to cause the the web server from launching.
Based on legacy requirements we keep using "JDK" (Java Development Kit) and since it's been proven to work on macOS, Windows and Linux.
You should be able to also use the slimmer "JRE" (Java Runtime Environment) if running the fw Server app host machine on Windows; if it fails to get detected by the fw Server app, install "JDK" v17.
We recommend to manually keep OpenJDK up to date. If it is allowed to auto-update while the fw Server app is running, then the Web Client and Mobile Web Client can't be used until the fw Server app is restarted. You should first Quit the running fw Server app, then update OpenJDK and then launch the fw Server app again.
Instructions
While doing the below actions, ensure the fw Server app is not running, and also check in Activity Monitor on Mac or Windows Task Manager that no "Java" process is running!
1. First UNINSTALL ALL previous Java versions - especially the old deprecated v1.6, v1.7, v1.8, etc.- on the fw Server host machine; you might need to search for uninstall instructions.
It can help to use the Windows Task Manager or Activity Monitor on Mac to ensure that no "Java" process is still running.
Only then Install OpenJDK.
2. Download OpenJDK e.g. here for
https://adoptium.net/temurin/releases/?version=17&arch=any
Use the Version: "17- LTS" (17.0.10 or later)
The installers are called for example:
For Windows: OpenJDK17U-jdk_x64_windows_hotspot_17.0.11_9.msi
For Mac: OpenJDK17U-jdk_x64_mac_hotspot_17.0.11_9.pkg
For Linux: OpenJDK17U-jdk_x64_linux_hotspot_17.0.11_9.tar.gz
⚠️ This is IMPORTANT in relation to the "log4j" exploit (December 2021)!
Ensure you have at least "LTS" Hotspot version 11.0.1 installed, even better follow the above info.
See more info on the "log4j" issue here: "log4j" exploit and farmerswife
We are using this on our side, and we recommend you do the same on yours.
3. After launching the fw Server application again, check e.g. that the Web Client is properly running.
Using the Windows Task Manager or Activity Monitor on Mac can help to ensure that now the "Java" process is running.
Known Errors and how to solve them:
"Error 500" - issues:
You are running a Java version higher than v11. Remove all Java versions on the host machine and follow the above instructions.
Abbreviations:
fw - farmerswife
JRE - Java Runtime Environment
JDK - Java Development Kit
LTS - Long Term Support
v - version