[jira] [Resolved] (GEARPUMP-317) Task minClock could be non increasing

["Manu Zhang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GEARPUMP-317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Manu Zhang resolved GEARPUMP-317.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 0.8.4

Issue resolved by pull request 187
[https://github.com/apache/incubator-gearpump/pull/187]

> Task minClock could be non increasing
> -------------------------------------
>
>                 Key: GEARPUMP-317
>                 URL: https://issues.apache.org/jira/browse/GEARPUMP-317
>             Project: Apache Gearpump
>          Issue Type: Bug
>          Components: streaming
>    Affects Versions: 0.8.3
>            Reporter: Manu Zhang
>            Assignee: Manu Zhang
>             Fix For: 0.8.4
>
>
> Task minClock is the minimum of upstream minClock and output minClock. Considering the following scenario,
> 1. Output minClock is set to Long.MaxValue since all messages have been acked by downstream tasks
> 2. But there are messages buffered in a window function
> 3. Later the window is triggered and those messages are emitted, which will set the output minClock to a smaller value.
> 4. Plus, the output messages are possibly not in time order, which again will make output minClock non increasing.



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