Why does Java 7 fail to Verify after successful JRE installation - Java 7 not running my any browser

java applet jnlp verification
srecinto picture srecinto · Feb 10, 2014 · Viewed 20.3k times · Source

This question was dogging me for a few days until I found almost a full answer but I want to share the issue first:

ISSUE

I have a Windows 7 pro 64 bit laptop that supports both IPv4 and IPv6 (important later) I downloaded and installed the latest Java 7 u 51 jre / browser plugin and would always get a grey applet box before it would eventually redirect and say "failed to verify" if java was installed.

I am also a java developer and had a few JDKs installed as well as jres. Thinking it was my environment I did a complete wipe of jave from my system (I ran JavaRa and made sure everything was removed http://singularlabs.com/software/javara/)

I installed the 32 bit version of the JRE for the chrome plugin and made sure all the setting and security info was correct (per the many posts about this topic).

After clearing all cache (browser and java), punching holes through my firewall (even disabling it to see if that would resolve it) as well as running things as administrator, verifying java was installed and running in all my browsers (it failed in IE, Chrome and FF)

All of this was per many posts that said how to solve the issue of Java 7 not running in any browser.

After enabling full trace and debugging with the Java console via the Java Control Panel I finally get some decent clues from the stack traces displayed in the console. It was failing to get resources from java or any site that had an applet or jnlp web start file.

Answer

srecinto picture srecinto · Feb 11, 2014

SOLUTION

Finally I ran across this post here (Java 7 on 32-bit Windows 7 - Java Webstart - Unable to load resource)

When adding "-Djava.net.preferIPv4Stack=true" to the runtime parameters under the Java Control Panel (java tab, view) for the current JRE, it solved the problem. I was able to restore my security setting to proper levels and was able to run the java verification tests as well asa bunch of other applets just fine.

When it cam to running jnlp files, I would still get errors unless I manually edit the jnlp file and add it to the vm args i.e.

If you want to apply this change system wide, add the _JAVA_OPTIONS environment variable and add -Djava.net.preferIPv4Stack=true to it

Regards, Shawn Recinto

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