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Bug 256674

Summary:	Jython doesn't work when JAVA_HOME isn't set or is set incorrectly
Product:	python	Reporter:	vincentvdl
Component:	Build	Assignee:	Lou Dasaro <mr_lou_d>
Status:	NEW ---
Severity:	normal
Priority:	P3
Version:	8.1
Hardware:	PC
OS:	All
Issue Type:	DEFECT	Exception Reporter:

Description vincentvdl 2015-11-18 21:03:01 UTC

Link: http://services.netbeans.org/synergy/client/app/

When trying to run the Swing Jython example as described in the Synergy test, I get the following traceback:

Traceback (most recent call last):
  File "<string>", line 444, in <module>
  File "<string>", line 435, in main
  File "Z:\jythondev\jython27\src\shell\build\jython\out00-PYZ.pyz\subprocess", line 522, in call
  File "Z:\jythondev\jython27\src\shell\build\jython\out00-PYZ.pyz\subprocess", line 710, in __init__
  File "Z:\jythondev\jython27\src\shell\build\jython\out00-PYZ.pyz\subprocess", line 958, in _execute_child
WindowsError: [Error 2] The system cannot find the file specified


About info NB IDE 8.1:

Product Version: NetBeans IDE 8.1 (Build 201510222201)
Java: 1.8.0_45; Java HotSpot(TM) 64-Bit Server VM 25.45-b02
Runtime: Java(TM) SE Runtime Environment 1.8.0_45-b15
System: Windows 8 version 6.2 running on amd64; Cp1252; en_US (nb)
User directory: C:\Users\Vincent\AppData\Roaming\NetBeans\8.1
Cache directory: C:\Users\Vincent\AppData\Local\NetBeans\Cache\8.1

Comment 1 vincentvdl 2015-11-18 21:14:05 UTC

I think this StackOverflow question is related to this problem:

http://stackoverflow.com/questions/30410385/jython-exe-2-7-0-final-release-failed-execution-on-my-windows-os

Comment 2 vincentvdl 2015-11-18 21:25:17 UTC

Somehow my JAVA_HOME in my Environment Variables settings was not correct. 

In Windows 10: 
Start > Settings > Search in the search-bar on "System" > choose "System" in the list > Advanced system settings > Environment Variables... > In System variables list (second one), find and double-click the "JAVA_HOME" variable and ensure that directory exists.

If the JAVA_HOME entry does not exist, then add it.

If I understand Jim Baker's post in the mentioned StackOverlow discussion correctly, Jython does not work when the path has quotes, so double-check that the JAVA_HOME path does not have quotes (they are not necessary here, even not when using spaces in directory names)

After correcting my JAVA_HOME path and restarting NB, the problem went away.

Comment 3 Lou Dasaro 2015-11-18 22:23:35 UTC

This becomes a documentation task for me. Users are required to set environment variable JAVA_HOME to reference a valid location for the installed Java.
I believe this needs to be a JDK, and not just a JRE - further investigation required...