Re: Issue: Java does not honor timezone setting

Hi,

I've tried to use /usr/share/zoneinfo/CET as /etc/localtime and it seems
java can't identify TZ correctly.
But in case of particular country's TZ, it works fine:

 # tzsetup
root@tamagawa /usr/share/zoneinfo
 # date
Wed Feb 14 16:40:48 CET 2024
root@tamagawa /usr/share/zoneinfo
 # export JAVA_VERSION=17
root@tamagawa /usr/share/zoneinfo
 # jshell
|  Welcome to JShell -- Version 17.0.9
|  For an introduction type: /help intro

jshell> java.time.ZonedDateTime.now()
$1 ==> 2024-02-14T16:41:13.106408203+01:00[Europe/Andorra]

I have no access to TrueNAS & jdk19, could you please try to specify the
country's TZ by tzsetup and check tz in java?

Thanks!


On Sun, Feb 11, 2024 at 12:53 AM <csab6597@gmail.com> wrote:

> 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
>