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https://issues.apache.org/jira/browse/FLINK-4329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15529539#comment-15529539
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ASF GitHub Bot commented on FLINK-4329:
---------------------------------------

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

    https://github.com/apache/flink/pull/2546#discussion_r80902027
  
    --- Diff: 
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/AsyncExceptionHandler.java
 ---
    @@ -18,12 +18,14 @@
     package org.apache.flink.streaming.runtime.tasks;
     
     /**
    - * Interface for reporting exceptions that are thrown in (possibly) a 
different thread.
    + * An interface marking a task as capable of handling exceptions thrown
    + * by different threads, other than the one executing the task itself.
      */
     public interface AsyncExceptionHandler {
     
        /**
    -    * Registers the given exception.
    +    * Handles an exception thrown by another thread (e.g. a TriggerTask),
    +    * other than the one executing the main task.
         */
    -   void registerAsyncException(AsynchronousException exception);
    +   void handleAsyncException(String message, Throwable exception);
    --- End diff --
    
    This name change is good!


> 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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