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

Question

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 JNL

Answer 1

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.

Answer 2

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)

Answer 3

I know this is an older question but this past week I started to get a similar problem, so I leave here some notes regarding the solution that fits me.

This happened only in some Windows machines using even the last JRE to date (1.8.0_45).

The Java Web Start started to load but nothing happened and none of the previous solution attempts worked.

After some digging i've found this thread, which gives the same setup and a great explanation.

https://community.oracle.com/thread/3676876

So, in conclusion, it was a memory problem in x86 JRE and since our JNLP's max heap was defined as 1024MB, we changed to 780MB as suggested and it was fixed.

However, if you need more than 780MB, can always try launching in a x64 JRE version.

Answer 4

I had the exact same problem. Turned out that the max-heap-size was set to 1024 and missing the unit. The configuration needed to be max-heap-size=1024m.

So apparently invalid memory configuration in the jnlp file will cause this exact behavior.