You could take a snapshot with NetBeans profiler or the Java mission control application to see what's going on.

Is this happening exclusively with the groovy project? In 9.0 you installed the groovy support modules manually?

Best regards,
-Bruno Flavio

On 14 May 2018 06:28:43 WEST, David Mills <David.Mills@medibank.com.au> wrote:

Hi all,


I use Netbeans with a few projects – one of which is Groovy based.  When I run with that project Netbeans starts using excessive CPU.  Restarting Netbeans resolves the issue for about 30 mins to 2 hours.  How can I diagnose what is using the CPU and how can I stop it.  The UI seems completely idle – there’s no evidence of anything in progress.


This has been the case for releases 8.2, latest development and the release candidate for 9.0.


I’m running on Windows Server 2012 on an AWS hosted VM.




David Mills | Senior Technical Analyst | Medibank Private

Level 1, 720 Bourke Street, Docklands, VIC, 3008 | Tel: 03 8622 5346 | Mob: 0411 513 404


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