[jira] [Created] (TAJO-1185) Default timezone should be UTC+0 instead of depending on JVM

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

Hyunsik Choi created TAJO-1185:
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             Summary: Default timezone should be UTC+0 instead of depending on JVM
                 Key: TAJO-1185
                 URL: https://issues.apache.org/jira/browse/TAJO-1185
             Project: Tajo
          Issue Type: Bug
            Reporter: Hyunsik Choi
             Fix For: 0.9.1


*Background*

Currently, Tajo allows users to set a single global timezone. Since the initial design, the default timezone of a Tajo cluster depends on the JVM timezone if there is no given timezone.

*Problem*
BTW, some of cluster nodes probably can have different timezones due to missed or wrong setting, which actually is usual in practice. It is like to cause wrong results because each task reads and processes a fragment of a single table generated with a single timezone.

*Solution*
In my opinion, the solution is to force Tajo to use an specified timezone instead of depending on JVM timezone. If there is no given timezone, GMT should be used in Tajo cluster.



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