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https://issues.apache.org/jira/browse/FLINK-4329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15417133#comment-15417133
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ASF GitHub Bot commented on FLINK-4329:
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Github user kl0u commented on the issue:
https://github.com/apache/flink/pull/2350
The way it works is that now the reader gets a ReaderContext and emits its
own watermarks depending on which timeCharacteristic we are operating on. If it
is on IngestionTime, which was the original problem, we emit periodically. In
addition, in this case, it assigns timestamps to the emitted elements.
> 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: 1.1.1
>
>
> 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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