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https://issues.apache.org/jira/browse/TIKA-4378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17923411#comment-17923411
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Tim Allison commented on TIKA-4378:
-----------------------------------
That behavior is at least 14 years old:
https://github.com/apache/tika/blame/main/tika-app/src/main/java/org/apache/tika/cli/TikaCLI.java#L238
I agree with Tilman, what would you expect?
> Tika app throws java.awt.HeadlessException
> ------------------------------------------
>
> Key: TIKA-4378
> URL: https://issues.apache.org/jira/browse/TIKA-4378
> Project: Tika
> Issue Type: Bug
> Components: app
> Affects Versions: 3.1.0
> Environment: {noformat}
> Distributor ID: Debian
> Description: Debian GNU/Linux 12 (bookworm)
> Release: 12
> Codename: bookworm
> openjdk 21.0.6 2025-01-21 LTS
> OpenJDK Runtime Environment Temurin-21.0.6+7 (build 21.0.6+7-LTS)
> OpenJDK 64-Bit Server VM Temurin-21.0.6+7 (build 21.0.6+7-LTS, mixed mode,
> sharing){noformat}
> Reporter: Alexander Veit
> Priority: Major
>
> When starting Tika App it throws a java.awt.HeadlessException.
> The command should only enter GUI mode if invoked with the -g or --gui option.
> {noformat}
> java -jar tika-app-3.1.0.jar
> Exception in thread "AWT-EventQueue-0" java.awt.HeadlessException:
> No X11 DISPLAY variable was set,
> or no headful library support was found,
> but this program performed an operation which requires it, at
> java.desktop/java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:164)
> at java.desktop/java.awt.Window.<init>(Window.java:553)
> at java.desktop/java.awt.Frame.<init>(Frame.java:428)
> at java.desktop/javax.swing.JFrame.<init>(JFrame.java:224)
> at org.apache.tika.gui.TikaGUI.<init>(TikaGUI.java:159)
> at org.apache.tika.gui.TikaGUI.lambda$main$0(TikaGUI.java:203)
> at
> java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
> at
> java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
> at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
> at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
> at
> java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
> at
> java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
> at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
> at
> java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
> at
> java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
> at
> java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
> at
> java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
> at
> java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
> at
> java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90){noformat}
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