`Cannot load 64-bit SWT libraries on 32-bit JVM` Raspberry Pi

[cycool29]

Describe the bug

Every time when I launch Angry IP Scanner, it shows Cannot load 64-bit SWT libraries on 32-bit JVM error. Installed from the DEB package from the download page.

Tried to launch from JAR file, same error.

Tried to build from source, it says I don't have org.eclipse.swt package.

This error only shows on Raspbian bullseye, on buster it works well.

To Reproduce

Steps to reproduce the behavior:

1. Get a Raspberry Pi and install the latest bullseye image
2. Download the DEB package and install
3. Launch it from terminal: ipscan
4. See error.

Expected behavior

Angry IP Scanner launch normally.

Screenshots

Versions (please complete the following information):

• Raspbian Bullseye armv7l
• openjdk version "11.0.13" 2021-10-19, installed from APT openjdk-11-jdk
• 3.7.6

Logs:

java.lang.UnsatisfiedLinkError: Cannot load 64-bit SWT libraries on 32-bit JVM
    at org.eclipse.swt.internal.Library.loadLibrary(Library.java:276)
    at org.eclipse.swt.internal.Library.loadLibrary(Library.java:256)
    at org.eclipse.swt.internal.C.<clinit>(C.java:19)
    at org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:209)
    at org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:155)
    at org.eclipse.swt.widgets.Display.<clinit>(Display.java:161)
    at net.azib.ipscan.gui.GUI.<init>(GUI.java:29)
    at net.azib.ipscan.Main.main(Main.java:47)

[angryziber]

On ARM cpu you need to install the any architecture package and install swt packages from your distro.

This is untested by me, so please write back how it goes.

[cycool29]

I've installed all packages in regex libswt*, still not working.

pi@raspberrypi:~ $ sudo apt search libswt

Sorting... Done
Full Text Search... Done
libswt-cairo-gtk-4-jni/stable,now 4.13.0-1+b2 armhf [installed]
  Standard Widget Toolkit for GTK+ Cairo JNI library

libswt-glx-gtk-4-jni/stable,now 4.13.0-1+b2 armhf [installed]
  Standard Widget Toolkit for GTK+ GLX JNI library

libswt-gtk-4-java/stable,now 4.13.0-1+b2 armhf [installed]
  Standard Widget Toolkit for GTK+ Java library

libswt-gtk-4-jni/stable,now 4.13.0-1+b2 armhf [installed]
  Standard Widget Toolkit for GTK+ JNI library

libswt-webkit-gtk-4-jni/stable,now 4.13.0-1+b2 armhf [installed]
  Standard Widget Toolkit for GTK+ WebKit JNI library

libswtcalendar-java/stable,now 0.5-3 all [installed]
  GUI date picker for Java using SWT

libswtchart-java/stable,now 0.10.0-4 all [installed]
  Chart drawing SWT component

libswtchart-java-doc/stable,now 0.10.0-4 all [installed]
  Chart drawing SWT component (documentation)

[cycool29]

List of installed packages with *swt* regex:

libeclipse-e4-ui-css-swt-java
libeclipse-e4-ui-css-swt-theme-java
libeclipse-e4-ui-swt-gtk-java
libswt-cairo-gtk-4-jni
libswt-glx-gtk-4-jni
libswt-gtk-4-java
libswt-gtk-4-jni
libswt-webkit-gtk-4-jni
libswtcalendar-java
libswtchart-java
libswtchart-java-doc

[angryziber]

There are two possibilities:

1. You have downloaded 64-bit ipscan with bundled SWT and not the "all" architecture option. Please check.
2. Raspbian accidentally provided a 64-bit binaries of SWT with some updates

The error message of SWT loader clearly states that 64-bit SWT libraries are being loaded on a 32-bit Java.

[cycool29]

I installed the buster DEB packages of libswt-cairo-gtk-4-jni, libswt-gtk-4-java and libswt-gtk-4-jni from packages.debian.org, and it worked!

[angryziber]

@cycool29 from here https://packages.debian.org/stable/libs/libswt-gtk-4-jni it seems that the package is available only for arm64, and not for 32-bit ARM.

Was the support for it removed? Maybe another solution would be to update to 64-bit Java?

[cycool29]

@theofficialgman made deep research on this: https://github.com/Botspot/pi-apps/issues/1045#issuecomment-1014849090

I will open a ticket on https://bugs.launchpad.net/raspbian later.