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https://issues.apache.org/jira/browse/FLINK-5625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15948605#comment-15948605
 ] 

ASF GitHub Bot commented on FLINK-5625:
---------------------------------------

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

    https://github.com/apache/flink/pull/3651#discussion_r108862488
  
    --- Diff: 
flink-connectors/flink-connector-kinesis/src/main/java/org/apache/flink/streaming/connectors/kinesis/util/KinesisConfigUtil.java
 ---
    @@ -224,27 +222,19 @@ private static void 
validateOptionalPositiveDoubleProperty(Properties config, St
                }
        }
     
    -   private static void validateOptionalDateProperty(Properties config, 
String timestampKey, String formatKey, String message) {
    +   private static void validateOptionalDateProperty(Properties config, 
String timestampKey, String format, String message) {
                if (config.containsKey(timestampKey)) {
    -                   if (config.containsKey(formatKey)) {
    -                           try {
    -                                   SimpleDateFormat customDateFormat = new 
SimpleDateFormat(config.getProperty(formatKey));
    -                                   
customDateFormat.parse(config.getProperty(timestampKey));
    -                           } catch (ParseException | 
IllegalArgumentException | NullPointerException exception) {
    -                                   throw new 
IllegalArgumentException(message);
    -                           }
    -                   } else {
    +                   try {
    +                           SimpleDateFormat customDateFormat = new 
SimpleDateFormat(format);
    +                           
customDateFormat.parse(config.getProperty(timestampKey));
    +                   } catch (ParseException | IllegalArgumentException | 
NullPointerException exception) {
                                try {
    -                                   
initTimestampDateFormat.parse(config.getProperty(timestampKey));
    -                           } catch (ParseException exception) {
    -                                   try {
    -                                           double value = 
Double.parseDouble(config.getProperty(timestampKey));
    -                                           if (value < 0) {
    -                                                   throw new 
NumberFormatException();
    -                                           }
    -                                   } catch (NumberFormatException 
numberFormatException) {
    -                                           throw new 
IllegalArgumentException(message);
    +                                   double value = 
Double.parseDouble(config.getProperty(timestampKey));
    +                                   if (value < 0) {
    +                                           throw new 
NumberFormatException();
    --- End diff --
    
    Shouldn't we actually throw `new IllegalArgumentException(message)` here?


> Let Date format for timestamp-based start position in Kinesis consumer be 
> configurable.
> ---------------------------------------------------------------------------------------
>
>                 Key: FLINK-5625
>                 URL: https://issues.apache.org/jira/browse/FLINK-5625
>             Project: Flink
>          Issue Type: Improvement
>          Components: Kinesis Connector
>            Reporter: Tzu-Li (Gordon) Tai
>            Assignee: Wei-Che Wei
>
> Currently, the Kinesis consumer's Date format for timestamp-based start 
> positions is fixed. It'll be nice to make this format configurable.



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