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Asked: 2026-06-18T15:15:01+00:00

I’m developing a new java web start capability for an existing site. All is

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I’m developing a new java web start capability for an existing site. All is going well except that one of my test launches, on one of machines has become mysteriously contaminated in a way that is so strange, I’m grasping at straws to explain.

Before the details, some general facts. The script works everywhere else. It fails from this one machine, only when logged in as one particular user. It fails if launched directly from the web, or if the local .jnlp file is launched directly from javaws.

The symptom when it fails is javaws reports “error at line 145”, which is itself inexplicable since the jnlp file has only about 15 lines. The smoking gun is that if I use javaws -verbose, I see the following text as the text of the file that failed to parse.

<!--
# Copyright (C) 2009, CyberTAN Corporation
# All Rights Reserved.
# 
# THIS SOFTWARE IS OFFERED "AS IS", AND CYBERTAN GRANTS NO WARRANTIES OF ANY
...

plus some suspicious looking javascript. I’ve determined that this text is what
my router presents when someone connected to the guest wireless network tries to
access the web for the first time.

So my working theory is that once during the testing phase, I booted up my netbook,
accidentally was connected to the guest network instead of the regular network,
managed to access the web jnlp file as the first network access, and got this
page in response instead of the expected.

My question is, where (and why) is this text persisting in the system? I’ve I ran a search
everywhere, including hidden files, and can’t find this text residing anywhere. I’ve also
flushed javaws caches using the -viewer option.

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1 Answer

  1. Editorial Team

    Do you still see the App in the Java Cache Viewer GUI (javaws -viewer)?

    Try to delete the cache at C:\Documents and Settings\[account]\Local Settings\Application Data\Sun\Java\Deployment\cache (or similar, assuming you’re using Windows)…

    Here’s some additional info: http://www.ngs.ac.uk/clearwebstartcache

    Have you updated the URL to your JNLP? Here’s some discussion going in this direction: https://forums.oracle.com/forums/thread.jspa?messageID=9804718

    Personally, I wouldn’t bother too much about the how and why – WebStart can be weird at times. Just ix the problem on your “one machine” and try to keep your productive JNLP as stable as possible.

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