[Bug]: error running hop-gui in debian bookworm and win 10 Pro (SwtSvgImageUtil issue)

[TTassoni]

Apache Hop version?

2.15

Java version?

openjdk version "17.0.15" 2025-04-15 OpenJDK Runtime Environment (build 17.0.15+6-Debian-1deb12u1) OpenJDK 64-Bit Server VM (build 17.0.15+6-Debian-1deb12u1, mixed mode, sharing)

Operating system

Linux

What happened?

I'm running a debian bookworm / LXDE 64-bit VirtualBox VM and it's running on the X11 windowing system.
When running ./hop-gui.sh I get a lot of errors all having to do with SwtSvgImageUtil. The actual Java error is the following:

2025/09/12 15:12:08 - SwtSvgImageUtil - ERROR: Error loading image from location 'mysql.svg'
2025/09/12 15:12:08 - SwtSvgImageUtil - ERROR: org.apache.hop.core.exception.HopException:
2025/09/12 15:12:08 - SwtSvgImageUtil - Error loading SVG file mysql.svg
2025/09/12 15:12:08 - SwtSvgImageUtil -
2025/09/12 15:12:08 - SwtSvgImageUtil -
2025/09/12 15:12:08 - SwtSvgImageUtil - org.apache.commons.vfs2.FileNotFoundException: Could not read from "file:///media/sf_Portabili/hop/mysql.svg" because it is not a file.
2025/09/12 15:12:08 - SwtSvgImageUtil - Could not read from "file:///media/sf_Portabili/hop/mysql.svg" because it is not a file.
2025/09/12 15:12:08 - SwtSvgImageUtil -
2025/09/12 15:12:08 - SwtSvgImageUtil - Could not read from "file:///media/sf_Portabili/hop/mysql.svg" because it is not a file.
2025/09/12 15:12:08 - SwtSvgImageUtil -
2025/09/12 15:12:08 - SwtSvgImageUtil -
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.core.svg.SvgCache.loadSvg(SvgCache.java:158)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.util.SwtSvgImageUtil.loadFromClassLoader(SwtSvgImageUtil.java:198)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.util.SwtSvgImageUtil.getUniversalImageInternal(SwtSvgImageUtil.java:152)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.util.SwtSvgImageUtil.getUniversalImage(SwtSvgImageUtil.java:174)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.core.gui.GuiResource.getImage(GuiResource.java:1479)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.core.gui.GuiResource.getImage(GuiResource.java:1455)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.core.gui.GuiResource.loadPluginImage(GuiResource.java:881)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.core.gui.GuiResource.loadDatabaseImages(GuiResource.java:938)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.core.gui.GuiResource.getResources(GuiResource.java:401)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.core.gui.GuiResource.(GuiResource.java:274)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.core.gui.GuiResource.(GuiResource.java:268)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.core.gui.GuiResourceImpl.getInstanceInternal(GuiResourceImpl.java:28)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.core.gui.GuiResource.getInstance(GuiResource.java:332)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.hopgui.HopGui.open(HopGui.java:384)
2025/09/12 15:12:08 - SwtSvgImageUtil - at org.apache.hop.ui.hopgui.HopGui.main(HopGui.java:364)
2025/09/12 15:12:08 - SwtSvgImageUtil - Caused by: org.apache.hop.core.exception.HopFileException:
2025/09/12 15:12:08 - SwtSvgImageUtil -
2025/09/12 15:12:08 - SwtSvgImageUtil - org.apache.commons.vfs2.FileNotFoundException: Could not read from "file:///media/sf_Portabili/hop/mysql.svg" because it is not a file.
2025/09/12 15:12:08 - SwtSvgImageUtil - Could not read from "file:///media/sf_Portabili/hop/mysql.svg" because it is not a file.
2025/09/12 15:12:08 - SwtSvgImageUtil -

**** and more ***

The error is NOT blocking, but hop-gui starts very slowly and when executing a workflow the same error was showed in the logging pane.

I have same error running hop-gui.bat on a windows 10 PRO PC with Microsoft jdk-17.0.13.11-hotspot (HOP_JAVA_HOME = C:\Program Files\Microsoft\jdk-17.0.13.11-hotspot)

Searching on github I found bug 3082 that is very similar, but now I'm not able to check if openjdk is running in headless mode or not to exclude same reason.

Issue Priority

Priority: 2

Issue Component

Component: Hop Gui

[hansva]

It seems you are trying to start it from a removable drive?
Though I think this should work, I would test if you get the same issues if it is actually on the host file system
The paths that are being generated for the images seem incorrect.

[TTassoni]

Hi, hans,
hop is not started from a removable drive, but from a shared folder of a physical HDD.
My host is win 10 Pro with virtualbox, Debian bookworm is the guest OS, because I cant install Debian as host due our company policy.
Apache Hop is installed on a shared folder (C:\Portabili\hop in windows) automounted by virtualbox in bookworm as ///media/sf_Portabili/hop/.
I tried to start hop-gui.bat from the host and it runs as expected.
Tom

[mattcasters]

I've seen similar errors on a current job where the Windows PCs are locked down and can't run any code except from certain very specific location on the PC itself. The Java process says it can't find the files, probably because it doesn't get permission from the system to see them.

[TTassoni]

how could I check the right permissions?

as first step, this is the output of ls -la command
tassonit@mypc:/media/sf_Portabili/hop$ ls -la
total 297
drwxrwx--- 1 root vboxsf 4096 19 nov 14.47 .
drwxrwx--- 1 root vboxsf 8192 21 nov 10.21 ..
drwxrwx--- 1 root vboxsf 0 19 nov 14.55 audit
drwxrwx--- 1 root vboxsf 0 10 nov 10.51 config
-rwxrwx--- 1 root vboxsf 4488 10 nov 10.51 hop
-rwxrwx--- 1 root vboxsf 4034 10 nov 10.51 hop.bat
-rwxrwx--- 1 root vboxsf 4335 10 nov 10.51 hop-conf.bat
-rwxrwx--- 1 root vboxsf 4244 10 nov 10.51 hop-conf.sh
-rwxrwx--- 1 root vboxsf 4322 10 nov 10.51 hop-encrypt.bat
-rwxrwx--- 1 root vboxsf 4192 10 nov 10.51 hop-encrypt.sh
-rwxrwx--- 1 root vboxsf 5015 10 nov 10.51 hop-gui.bat
-rwxrwx--- 1 root vboxsf 4778 10 nov 10.51 hop-gui.sh
-rwxrwx--- 1 root vboxsf 38078 10 nov 10.51 hop.ico
-rwxrwx--- 1 root vboxsf 4363 10 nov 10.51 hop-import.bat
-rwxrwx--- 1 root vboxsf 4243 10 nov 10.51 hop-import.sh
-rwxrwx--- 1 root vboxsf 5557 10 nov 10.51 hop-run.bat
-rwxrwx--- 1 root vboxsf 4237 10 nov 10.51 hop-run.sh
-rwxrwx--- 1 root vboxsf 4340 10 nov 10.51 hop-search.bat
-rwxrwx--- 1 root vboxsf 4246 10 nov 10.51 hop-search.sh
-rwxrwx--- 1 root vboxsf 4506 10 nov 10.51 hop-server.bat
-rwxrwx--- 1 root vboxsf 4505 10 nov 10.51 hop-server.sh
-rwxrwx--- 1 root vboxsf 2109 10 nov 10.51 hop-server.xml
drwxrwx--- 1 root vboxsf 0 10 nov 10.51 lib
-rwxrwx--- 1 root vboxsf 110509 10 nov 10.51 LICENSE
drwxrwx--- 1 root vboxsf 0 10 nov 10.51 licenses
-rwxrwx--- 1 root vboxsf 342 10 nov 10.51 NOTICE
drwxrwx--- 1 root vboxsf 4096 10 nov 10.51 plugins
drwxrwx--- 1 root vboxsf 0 10 nov 10.51 pwd
-rwxrwx--- 1 root vboxsf 2430 10 nov 10.51 README.txt
drwxrwx--- 1 root vboxsf 0 10 nov 10.51

[mattcasters]

It's not a file system permission. In our case access is blocked by Windows Intune on any folder except for one particular place on the C:\ drive that you can use. Zenworks has a similar security system.

[TTassoni]

I tried this DIRTY workaround: I put the 3 files that SwtSvgImageUtil cant find (MySQL.svg, postgresql.png, postgresql.svg) in the hop folder.
SwtSvgImageUtil don't write any error in xterm, but hop (2.16) starts slowly, more than 2 minutes