[NETBEANS-542] Cannot quit 2nd instance of Netbeans

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 8.2

Environment

java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)
ProductName: Mac OS X
ProductVersion: 10.13.3
BuildVersion: 17D102

Model Name: iMac
Model Identifier: iMac17,1
Processor Name: Intel Core i7
Processor Speed: 4 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 32 GB
Boot ROM Version: IM171.0110.B00
SMC Version (system): 2.34f2

• Assignee: Unassigned
• Reporter: Dave D
• Created: 28/Mar/18 22:58
• Updated: 15/Jun/21 16:07
• Resolved: 15/Jun/21 16:07

Description

Cannot quit 2nd (ghost) instance of application, or restart computer. Steps to reproduce:

• Open Netbeans
• Re-open Netbeans while it is currently open

Now two Netbeans icons will display in the Dock. The original version can be quit normally. The newly opened version shows "Application not Responding" when right-clicking its icon in the Dock. It cannot be force quit via the Dock or via Apple's "Force Quit Applications" window, and cannot be located in Activity Monitor. Whatever is running (or starting to run and never fully opening) prevents user logout or standard shutdown. The only remedy is a sudo shutdown via Terminal, or holding down the power button to forcibly shut down.
Note that this bug has been reported at netbeans.org, but the thread seems to be dead, with no developer activity/response in the last few years, that I can see. I'm starting a new issue here in hopes the problem will be addressed at all, and/or some workaround suggested by the NB dev team besides forcible system shutdown.

java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)
ProductName: Mac OS X
ProductVersion: 10.13.3
BuildVersion: 17D102

Model Name: iMac
Model Identifier: iMac17,1
Processor Name: Intel Core i7
Processor Speed: 4 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 32 GB
Boot ROM Version: IM171.0110.B00
SMC Version (system): 2.34f2