Issue: Java does not honor timezone setting

Hi there,

 

I am using TrueNAS Core TrueNAS-13.0-U6.1 where in a jail I installed jdk
19. In the shell I get

 

# java -version

openjdk version "19.0.2" 2023-01-17

OpenJDK Runtime Environment (build 19.0.2+7-1)

OpenJDK 64-Bit Server VM (build 19.0.2+7-1, mixed mode, sharing)

 

The issue I encountered is that java does not honor the timezone I have set
in TrueNAS.

When using the builtin command  in the TrueNAS shell I can see

 

# date
Sat Feb 10 10:36:35 CET 2024

 

So that command reports CET timezone which is in fact what it should be,
what is set in TrueNAS system configuration

But inside java, for a test just using jshell, then java will report GMT
which means java is ignoring the timezone setting and thus giving an offset
to the actual time

 

# jshell
|  Welcome to JShell -- Version 19.0.2
|  For an introduction type: /help intro
 
jshell> java.time.ZonedDateTime.now()
$3 ==> 2024-02-10T09:38:12.192401862Z[GMT]
 
jshell> java.time.LocalDateTime.now()
$1 ==> 2024-02-10T09:38:12.192401862Z

 

 

Also tested in Windows and Ubuntu where Java will indeed report the correct
timezone

 

Greets, Rainer