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https://issues.apache.org/jira/browse/OOZIE-2494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16425359#comment-16425359
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Julia Kinga Marton edited comment on OOZIE-2494 at 4/4/18 11:33 AM:
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With the fix of OOZIE-2726 a small functionality change is included for the
following scenario:
* between the start and end date there is one DST start
* the nominal time of the last action should be maximum 1h before the end time.
* this last action will not be created after the OOZIE-2726, because of the
DST correction, the nominal time will exceed the end time.
(is almost the same with the opposite scenario, when +1 action is cerated)
The attached testActionMaterWithDST3.patch contains a test case for this
scenario.
was (Author: kmarton):
With the fix of OOZIE-2726 a small functionality change is included for the
following scenario:
* between the start and end date there is one DST start
* the nominal time of the last action should be maximum 1h before the end time.
* this last action will not be created after the OOZIE-2726, because of the
DST correction, the nominal time will exceed the end time.
(is almost the same with the opposite scenario, when +1 action is cerated)
> 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,
> 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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