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https://issues.apache.org/jira/browse/FLINK-13955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16958621#comment-16958621
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Piotr Nowojski commented on FLINK-13955:
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This might be superseded by migrating {{ContinuousFileReaderOperator}} to the
new {{SourceReader}} interface.
> Integrate ContinuousFileReaderOperator with StreamTask mailbox execution model
> ------------------------------------------------------------------------------
>
> Key: FLINK-13955
> URL: https://issues.apache.org/jira/browse/FLINK-13955
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Task
> Reporter: Alex
> Priority: Major
>
> The {{ContinuousFileReaderOperator}} spawns an additional ({{reader}}) thread
> and coordinates actions with it via {{checkpointLock}}. The operator may
> block, waiting for a notification from the {{reader}} thread, potentially
> preventing progress in mailbox loop.
> This is similar to {{AsyncWaitOperator}} situation described in FLINK-12958.
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