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Asked: 2026-05-11T09:29:42+00:00

I found a bug in an application that completely freezes the JVM. The produced

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I found a bug in an application that completely freezes the JVM. The produced stacktrace would provide valuable information for the developers and I would like to retrieve it from the Java console. When the JVM crashes, the console is frozen and I cannot copy the contained text anymore.

Is there way to pipe the Java console directly to a file or some other means of accessing the console output of a Java application?

Update: I forgot to mention, without changing the code. I am a manual tester.

Update 2: This is under Windows XP and it’s actually a web start application. Piping the output of 

javaws jnlp-url

does not work (empty file).

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1 Answer

  1. Actually one can activate tracing in the Java Control Panel. This will pipe anything that ends up in the Java console in a tracing file.

    The log files will end up in:

    • <user.home>/.java/deployment/log on Unix/Linux
    • <User Application Data Folder>\Sun\Java\Deployment\log on Windows
    • /~/Library/Caches/Java/log on OS X
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