[GitHub] taegeonum commented on a change in pull request #153: [NEMO-245, 247] Handle watermark in OutputWriter and Implement unbounded word count example

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taegeonum commented on a change in pull request #153: [NEMO-245,247] Handle watermark in OutputWriter and Implement unbounded word count example
URL: https://github.com/apache/incubator-nemo/pull/153#discussion_r232482013
 
 

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 File path: runtime/executor/src/main/java/org/apache/nemo/runtime/executor/datatransfer/MultiInputWatermarkManager.java
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 @@ -74,7 +84,10 @@ public void trackAndEmitWatermarks(final int edgeIndex, final Watermark watermar
       if (minWatermark.getTimestamp() > prevMinWatermark.getTimestamp()) {
         // Watermark timestamp progress!
         // Emit the min watermark
-        nextOperator.getTransform().onWatermark(minWatermark);
+        if (LOG.isDebugEnabled()) {
+          LOG.debug("Emit watermark {}, {}", minWatermark, watermarks);
 
 Review comment:
   watermark is generated with low rate (e.g., 1 sec), so I think it is ok

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