zentol commented on a change in pull request #15553:
URL: https://github.com/apache/flink/pull/15553#discussion_r611466880



##########
File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/ExecutionGraphHandler.java
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@@ -204,7 +204,7 @@ public SerializedInputSplit requestNextInputSplit(
 
         final InputSplit nextInputSplit = execution.getNextInputSplit();
 
-        if (log.isDebugEnabled()) {
+        if (nextInputSplit != null) {
             log.debug("Send next input split {}.", nextInputSplit);
         }

Review comment:
       
`org.apache.flink.api.common.io.DefaultInputSplitAssigner#getNextInputSplit`
   
   Maybe we should move that logging into the ExecutionGraphHandler so it 
applies to all implementations?




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