Will the Brazil DST change in 2018 affect CA UIM

Products

• DX Unified Infrastructure Management (Nimsoft / UIM)

Issue/Introduction

Lawmakers in Brazil have decided to move the start of Daylight Saving Time (DST) from 2018, effectively shortening the DST-period in the country by two weeks.
On the night between Saturday, November 3 and Sunday, November 4, 2018 clocks in the southern parts of Brazil will be set forward 1 hour from 00:00 (12:00 am, midnight) to 01:00 (1:00 am).

Same End Date
On December 16, 2017, the president of Brazil, Michel Temer, signed a decree moving the start of DST in the South American country from October to November.

Better for the Elections
The decree comes as a result of federal elections in Brazil in October next year. Setting the clocks forward after the second round of elections allows for a better vote count after the poll stations close in the different time zones in the country.

What precautions should be taken to prevent any problem related to DST change in CA UIM?

Environment

CA UIM

 

Resolution

All the items below must be validated:

A) Ensure the Operating System DST(Daylight Saving Time) start date is correct, on November 4, 2018 at 12:00 AM.

B) Ensure the JRE tzdata on the UIM machines have the update for DST change:

https://www.oracle.com/technetwork/java/javase/tzdata-versions-138805.html

The JRE tzdata version should be tzdata2018c or above.

Here are the steps to check the version and update the tzdata:

1) Download the Java Time Zone Updater Tool

https://www.oracle.com/technetwork/java/javase/downloads/index.html

2) Extract the Time Zone Updater 2.2.0 (tzupdater-2.2.0.zip) file and save the tzupdater.jar file in the C:\Program Files (x86)\Nimsoft\jre\jre8u102\bin\ directory

3) In a DOS-Prompt window as Administrator, navigate to the C:\Program Files (x86)\Nimsoft\jre\jre8u102\bin\ directory and run the following syntax to check the version of tzupdater.jar file:

java -jar tzupdater.jar -V

If the machine does not have access to the internet you will get the message above.

Regardless of the message, you will see the JRE tzdata version: tzdata2016d. (This version does not support the new DST change)

4) Download the file: tzupdater-2_2_0.zip from https://www.oracle.com/technetwork/java/javase/downloads/tzupdater-download-513681.html 

and the tzdata2018g.tar.gz file from https://data.iana.org/time-zones/releases/ save it at C:\tmp\ directory of the UIM Server and UIM Portal Servers:

5) In a DOS-Prompt window as Administrator, navigate to the C:\Program Files (x86)\Nimsoft\jre\jre8u102\bin\ directory and run the following syntax to manually patch the installation with the tzdata2018g (timezone data): 

C:\Program Files (x86)\Nimsoft\jre\jre8u102\bin>java -jar tzupdater.jar -l file:///C:/tmp/tzdata2018e.tar.gz 

Successfully updated to tzdata2018g version.

If the UIM servers have access to the internet, you can run this syntax:

In a DOS-Prompt window as Administrator, navigate to the C:\Program Files (x86)\Nimsoft\jre\jre8u102\bin\ directory and run the following syntax to manually patch the installation with the tzdata2018f (timezone data): 

C:\Program Files (x86)\Nimsoft\jre\jre8u102\bin>java -jar tzupdater.jar -l https://data.iana.org/time-zones/releases/tzdata2018f.tar.gz 

Or 

java -jar tzupdater.jar -l

Using https://data.iana.org/time-zones/releases/tzdata2018e.tar.gz as source for tzdata bundle. 

6) Restart the Wasp probe from the UMP Portal Server