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https://issues.apache.org/jira/browse/OOZIE-2494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16440471#comment-16440471
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Hadoop QA commented on OOZIE-2494:
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PreCommit-OOZIE-Build started


> Cron syntax not handling DST properly
> -------------------------------------
>
>                 Key: OOZIE-2494
>                 URL: https://issues.apache.org/jira/browse/OOZIE-2494
>             Project: Oozie
>          Issue Type: Bug
>          Components: coordinator
>    Affects Versions: 4.2.0
>            Reporter: Dennis Pallett
>            Assignee: Julia Kinga Marton
>            Priority: Blocker
>         Attachments: CronExpressionPOC.java, OOZIE-2494-001.patch, 
> OOZIE-2494-002.patch, OOZIE-2494-003.patch, OOZIE-2494-004.patch, 
> OOZIE-2494-005.patch, OOZIE-2494-006.patch, OOZIE-2494-007.patch, 
> testActionMaterWithDST3.patch
>
>
> When specifying a coordinator frequency, you can also specify a "timezone".  
> While the frequency is always calculated in UTC, the timezone’s DST rules are 
> still applied.  We can see this in the following two Coordinators, which ran 
> across the DST shift (March 13 2016 at 2am) for the America/Los_Angeles 
> timezone.  The "el-UTC" job has "UTC" as the timezone, while the "el-LA" job 
> has “America/Los_Angeles” as the timezone.  Both jobs have a frequency of 
> {{$\{coord:days(1)\}}}.
> {noformat}
> Job Name    : el-UTC
> Start Time  : 2016-03-13 01:10 GMT | 2016-03-12 17:10 PST
> ---------------------------------------------------------
> ID     Nominal Time (UTC)       Nominal Time (LA)
> @1     2016-03-13 01:10 GMT     2016-03-12 17:10 PST
> @2     2016-03-14 01:10 GMT     2016-03-13 18:10 PDT
> {noformat}
> {noformat}
> Job Name    : el-LA
> Start Time  : 2016-03-13 01:10 GMT | 2016-03-12 17:10 PST
> ---------------------------------------------------------
> ID     Nominal Time (UTC)       Nominal Time (LA)
> @1     2016-03-13 01:10 GMT     2016-03-12 17:10 PST
> @2     2016-03-14 00:10 GMT     2016-03-13 17:10 PDT
> {noformat}
> As you can see, @2’s nominal time is adjusted to an hour earlier in the 
> "el-LA" job, but not in the "el-UTC" job.
> However, when running a similar set of jobs, but using cron syntax [({{10 1 
> 1/1 * *}}|http://crontab.guru/#10_1_1/1_*_*], which indicates 1:10 every day 
> of every month), this isn’t the case:
> {noformat}
> Job Name    : cron-UTC
> Start Time  : 2016-03-13 01:08 GMT | 2016-03-12 17:08 PST
> ---------------------------------------------------------
> ID     Nominal Time (UTC)       Nominal Time (LA)
> @1     2016-03-13 01:10 GMT     2016-03-12 17:10 PST
> @2     2016-03-14 01:10 GMT     2016-03-13 18:10 PDT
> {noformat}
> {noformat}
> Job Name    : cron-LA
> Start Time  : 2016-03-13 01:08 GMT | 2016-03-12 17:08 PST
> ---------------------------------------------------------
> ID     Nominal Time (UTC)       Nominal Time (LA)
> @1     2016-03-13 01:10 GMT     2016-03-12 17:10 PST
> @2     2016-03-14 01:10 GMT     2016-03-13 18:10 PDT
> {noformat}
> As you can see, @2’s nominal time are the same in both the "cron-UTC" and 
> "cron-LA" jobs.  The "cron-LA" job should have the same nominal time as the 
> "el-LA" job from earlier.



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