I am not able launch JNLP applications using "Java Web Start"?

user_108769 0
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Up until recently, I was able to launch/open JNLP files in Firefox using Java web start.

Don't know what happened all of a sudden JNLP files stopped launching, a splash screen appears saying Java Starting... and then nothing happens. Even the Java Console in the browser and javacpl.cpl applet doesn't open.

Tried all possibilities: removed all older version and installed the latest JRE (java version "1.6.0_17"), still it doesn't work.

Done some googling for this problem, people suggested to start javaws.exe with -viewer option but same behavior (a splash screen appears saying "Java Starting..." and then disappears)

The problem is that I don't know any place (logs etc.) to look for to see what is causing the problem.

I am using WinXP SP3, and some of the screenshots below shows further info about my system. I can provide any other detail if required but please help me solve this problem.

java-web-start jnlp java
17 Answers

Have a look at what happens if you run javaws.exe directly from the command line.

user_538970

Java web start should be enabled.
Check if javaws (Java web start is enabled for your system), Use below command in console to open java control panel.

javaws -viewer

Image for your refrence

user_84433320

I was also facing the same problem. To fix this to the following steps.

  1. open Javaws from cmd runnig javaws -viewer command. A new window will open
  2. Select the jnlp file which you want and click the run button.
  3. Close the javaws viewer window.
user_92113110

Same solution worked as suggested by hpereira The issue was due to JRE version was 32 bit and not 64 Bit Check with java -version to see if your Java is 64 bit

C:\>java -version
java version "1.8.0_192"
Java(TM) SE Runtime Environment (build 1.8.0_192-b12)
Java HotSpot(TM) **64-Bit Server** VM (build 25.192-b12, mixed mode)
user_138416990

Is this an application to which you have the code? Java 6u14 included a change to the way it handles jar security that for us caused very similar issues. If your jars are signed and work with Java 6u13 or below, you might consider either refactoring your code to work around this update or requiring Java 6u13 or below. Unfortunately I don't recall exactly what we did to resolve the issue - it was panic mode at the time.

Again, if you have the code you have tools to work with. You can put in System.out.println statements in your startup routines - anything console output is displayed in the command window when you run the JNLP from the command line. Otherwise you might consider using a nice logger like log4j to get a better idea of the point of failure.

You may also consider removing the application entirely and downloading it anew. Java Web Start has a Control Panel applet that allows you to see the URL your app is downloading from (could be the wrong one), uninstall the app, set security options, etc.

user_2172690

This can also be due to environment variable CATALINA_HOME in your system. In our organization there were several cases where JNLP applications just refused to start without logging anything and emptying CATALINA_HOME solved the issue.

I had the environment variable set in the command prompt and it didn't appear in GUI. I'm not sure if setx command or register removal commands did the trick. Restart seems to be necessary after removing the variable.

user_86462280

I believe this is a security problem. If I download the jnpl file and execute it after a clean java 8 installation via javaws myfile.jnpl everything is working fine (I get multiple windows where I have to confirm some security problems).

user_12400180

I wanted to share the root cause for my issue. I was using High DPI in Windows and this caused JNLP to not launch. I had to turn off High DPI for this to work. Hope this helps.

user_63051050

Try Java Web Launcher, rather than Java Web Start Launcher. It worked for me.

user_116894950

Right-click on the JNLP file that is not opening and select Open With. In the ‘How you want to open this File’ window, scroll down and click on Look for another app on this PC option. When the File Explorer window opens, navigate to the following location: C:\Program Files (x86)\Java\jre1.8.0_261\bin or the folder for 64bit version

Select javaws.exe and click the Open button. This will open the JNLP file as intended. Make sure to check the Always use this app to open .jnlp files. That's all.

user_12222710
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