Conversion from summer time (daylight savings) to winter time.

[BSG]

Hi All,

When converting from summer to winter time (with one double hour) for the ABAP stacks action needs to be taken to make sure no problems arise. For the ABAP stacks there are several possibilities; e.g. see /people/tikkana.akurati/blog/2009/12/09/daylight-saving-time-and-slowing-down-the-time

What about the JAVA stacks however? Is it OK to keep them running.>Or does action need to be taken for JAVA systems to? And what if there is JAVA <-> ABAP communication and the ABAP stack is set to slow time during this hour?

Can anyone advise on this?

Thanks.

Regards,

Bart Groot

[BSG]

Hi Javier,

Thanks for your reply.

The actual question however is not how to set the timezone for the JAVA stack but if actions are needed as like ABAP (eg stop the JAVA system for 2 hours) during the transition from daylightsaving (summer) time to winter time.

Thanks.

Regards,

Bart.

[Former Member]

Hi,

Well it is no more necessary to stop an ABAP system when coming back to winter time.

Check OSS note 950114 about system parameter zdate/DSTswitch_contloctime

For the JAVA stack, as there is no functional data in the database, I don't think there is anything to do.

You might get strange logs files but who cares ? Java logs files are already so strange !

Regards,

Olivier

[Former Member]

Hi Bart,

In addition, please check out the SAP notes: 438660, 7417 and 102088.

You should have your answer here.

Regards,

Sujit.

[BSG]

Will investigate further internally.

[shaun_wimpory2]

Hi Bart,

Was wondering how you went with your DST shift into winter time (eg double hour) for your ABAP and Java stacks??

Did you stop your SAP systems?

If not, and you left them running, how did everything go?

Cheers

Shaun

[fjhernanz]

Hi,

The timezone for the java systems is controlled by the jvm. So to alter the time zone you have to add the following parameter to the server0/1 nodes java parameters in the configtool:

-Duser.timezone=EST (or = too what ever timezone your in)

Br,

Javier