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t-oster / VisiCut

A userfriendly tool to prepare, save and send Jobs to Lasercutters
https://visicut.org
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Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedClassVersionError: com/google/zxing/LuminanceSource : Unsupported major.minor version 51.0 #320

Closed peteruithoven closed 4 years ago

peteruithoven commented 8 years ago

When starting Visicut 1.7-297 (the latest) in OS X 10.9.5 it got stuck at the loading screen. (OS X 10.9.5 is two version behind the latest, see OS X versions) Starting it through the terminal (VisiCut.app/Contents/MacOS/JavaApplicationStub) it gives the following error: 

MacOS/JavaApplicationStub 
Dec 16 17:12:38 peteruithoven-2.local JavaApplicationStub[25828] <Error>: The function `CGContextErase' is obsolete and will be removed in an upcoming update. Unfortunately, this application, or a library it uses, is using this obsolete function, and is thereby contributing to an overall degradation of system performance.
Exception in thread "AWT-EventQueue-0" java.lang.UnsupportedClassVersionError: com/google/zxing/LuminanceSource : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at com.frochr123.qrcodescan.QRCodeScanner.<init>(QRCodeScanner.java:48)
    at com.frochr123.periodictasks.RefreshQRCodesTask.<init>(RefreshQRCodesTask.java:69)
    at com.t_oster.visicut.gui.MainView.setCameraActive(MainView.java:3401)
    at com.t_oster.visicut.gui.MainView.refreshButtonStates(MainView.java:1662)
    at com.t_oster.visicut.gui.MainView.visicutModel1PropertyChange(MainView.java:2129)
    at com.t_oster.visicut.gui.MainView.<init>(MainView.java:382)
    at com.t_oster.visicut.gui.VisicutApp.startup(VisicutApp.java:72)
    at org.jdesktop.application.Application$1.run(Application.java:171)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:715)
    at java.awt.EventQueue.access$400(EventQueue.java:82)
    at java.awt.EventQueue$2.run(EventQueue.java:676)
    at java.awt.EventQueue$2.run(EventQueue.java:674)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:86)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:685)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
java.net.SocketTimeoutException: connect timed out

There is more (stacktrace), but I'm guessing that's not relevant.

peteruithoven commented 8 years ago

Zxing is an open-source, multi-format 1D/2D barcode image processing library.

peteruithoven commented 8 years ago

With my limited Java experience I can't even figure out where 51.0 is coming from, is this the version of a dependency zxing is trying use?

mgmax commented 8 years ago

Is this specific to the Mac OS Version, or does it also happen with the zip file?

Am 16. Dezember 2015 19:11:22 MEZ, schrieb Peter Uithoven notifications@github.com:

With my limited Java experience I can't even figure out where 51.0 is coming from, is this the version of a dependency zxing is trying use?

Reply to this email directly or view it on GitHub: https://github.com/t-oster/VisiCut/issues/320#issuecomment-165194924

Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet.

peteruithoven commented 8 years ago

Apparently not, I can start the VisiCut.MacOS file in OS X. The last line of the error I posted (and the rest of that stacktrace) happened because the lasercutter wasn't found.

t-oster commented 8 years ago

Could it be that the Java application stub loads Java 1.6 which is not supported because some classes need 1.7 or later?

Am 16. Dezember 2015 20:02:13 MEZ, schrieb Peter Uithoven notifications@github.com:

Apparently not, I can start the VisiCut.MacOS file in OS X. The last line of the error I posted (and the rest of that stacktrace) happened because the lasercutter wasn't found.

Reply to this email directly or view it on GitHub: https://github.com/t-oster/VisiCut/issues/320#issuecomment-165210980

Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet.

peteruithoven commented 8 years ago

Is there a way I could test that?

t-oster commented 8 years ago

well you may use some kind of process inspector/task manager to see which java-executable is running. It's definitely time to #278 Fix OSX Packaging, by including a JavaRuntimeEnvironment in the app-bundle

companje commented 8 years ago

Solution for me was to update from java 1.6 to java version 1.8 from this page: http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html But after installing and rebooting it 1.6 was still the default java version. I ended up changing the VisiCut.MacOs shell script by referring to the absolute path of java 1.8.

#!/bin/bash
DIR="$( cd -P "$( dirname "$0" )" && pwd )"
JAVA=/Applications/Processing.app/Contents/PlugIns/jdk1.8.0_74.jdk/Contents/Home/jre/bin/java
$JAVA -Xms256m -Xmx1024m -jar "$DIR/Visicut.jar" --singleinstanceport 6543 "$@"

(@peteruithoven notices this is probably not the version I just installed but another one which came with Processing. But it works for me...)

mgmax commented 4 years ago

Closing as we don't support Java < 9 anymore.