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https://issues.apache.org/jira/browse/FLINK-1967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14611837#comment-14611837
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ASF GitHub Bot commented on FLINK-1967:
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Github user gyfora commented on the pull request:
https://github.com/apache/flink/pull/879#issuecomment-118008845
Also maybe it is completely unnecessary to automatically attach a source
timestamp if we don't have any windowing operators.
One other thing that came into my mind: in order to keep "deterministic"
results after failure we should persist data with the timestamp attached at the
sources. Are we planning to do this? I guess this question goes hand in hand
with the automatic source level backup even without kafka. I just wanted to
bring it up.
> Introduce (Event)time in Streaming
> ----------------------------------
>
> Key: FLINK-1967
> URL: https://issues.apache.org/jira/browse/FLINK-1967
> Project: Flink
> Issue Type: Improvement
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
>
> This requires introducing a timestamp in streaming record and a change in the
> sources to add timestamps to records. This will also introduce punctuations
> (or low watermarks) to allow windows to work correctly on unordered,
> timestamped input data. In the process of this, the windowing subsystem also
> needs to be adapted to use the punctuations. Furthermore, all operators need
> to be made aware of punctuations and correctly forward them. Then, a new
> operator must be introduced to to allow modification of timestamps.
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