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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4329) Fix Streaming File Source Timestamps/Watermarks Handling
Date Thu, 29 Sep 2016 08:35:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15532167#comment-15532167
] 

ASF GitHub Bot commented on FLINK-4329:
---------------------------------------

Github user kl0u commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2546#discussion_r81088167
  
    --- Diff: flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/DefaultTimeServiceProvider.java
---
    @@ -99,7 +100,7 @@ public void run() {
     					target.trigger(timestamp);
     				} catch (Throwable t) {
     					TimerException asyncException = new TimerException(t);
    --- End diff --
    
    No. This is just because this is how it was before. I will remove it.


> Fix Streaming File Source Timestamps/Watermarks Handling
> --------------------------------------------------------
>
>                 Key: FLINK-4329
>                 URL: https://issues.apache.org/jira/browse/FLINK-4329
>             Project: Flink
>          Issue Type: Bug
>          Components: Streaming Connectors
>    Affects Versions: 1.1.0
>            Reporter: Aljoscha Krettek
>            Assignee: Kostas Kloudas
>             Fix For: 1.2.0, 1.1.3
>
>
> The {{ContinuousFileReaderOperator}} does not correctly deal with watermarks, i.e. they
are just passed through. This means that when the {{ContinuousFileMonitoringFunction}} closes
and emits a {{Long.MAX_VALUE}} that watermark can "overtake" the records that are to be emitted
in the {{ContinuousFileReaderOperator}}. Together with the new "allowed lateness" setting
in window operator this can lead to elements being dropped as late.
> Also, {{ContinuousFileReaderOperator}} does not correctly assign ingestion timestamps
since it is not technically a source but looks like one to the user.



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