Troubleshooting a Java Web Start application and accessing log files

Question

I am launching a Java Web Start application which shuts down abruptly. Does anybody know how to access the logs for Java Web Start. Are there any known reasons for it to shut down abruptly?

Solution 1

You should enable detailed trace logging as explained on this page. The same page gives you the location of the log files;

The trace file is saved into the log directory in the "Java Deployment Home" folder. That folder's location is specific to your operating system:

• Windows XP: %HOME%\Application Data\Sun\Java\Deployment
• Windows 7/Vista: %APPDATA%\..\LocalLow\Sun\Java\Deployment
• Linux/Solaris: %HOME%/.java/deployment

Solution 2

On my Windows 10 computer, the log file is found at:

C:\Users\<MY USER>\AppData\LocalLow\Sun\Java\Deployment\log

Solution 3

I am not sure why it would fail like that but you should be able to see where the logs by going to File/Preferences/Advanced.

You should also be able to enable java console from the same location.

Solution 4

Having -Xmx with a value too large was the cause of the issue for me.

Reducing the heap size resolved it.

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Comments

[Sarel Botha]

Also, using -Xmx with a value too large will make java fail to start.

[nhylated]

@SarelBotha - That shouldn't ideally happen given that the system has sufficient free memory to accommodate the max-heap size. The issue that you faced can be because of different reasons though. For e.g. on Linux, JVM fails to start if the OS's or the shell's virtual memory limit is limited (check: looselytyped.blogspot.in/2014/08/…)

[mostafa.S]

for example mine is under: C:\Users\mostafa.sho\AppData\LocalLow\Sun\Java\Deployment\lo‌​g and mostafa.sho is my username in windows.

[gravity]

Is there any guidance for OP regarding abrupt shutdowns you could offer?