guozhangwang commented on a change in pull request #9744:
URL: https://github.com/apache/kafka/pull/9744#discussion_r556718772



##########
File path: 
streams/src/main/java/org/apache/kafka/streams/processor/internals/AbstractProcessorContext.java
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@@ -45,7 +45,6 @@
     private boolean initialized;
     protected ProcessorRecordContext recordContext;
     protected ProcessorNode<?, ?, ?, ?> currentNode;
-    private long currentSystemTimeMs;

Review comment:
       I think its rationale is actually to "not advance" the system time while 
in the middle of processing a record, i.e. the `system time` would just be the 
time when we start processing / punctuating, and it would not change throughout 
the process / punctuate.




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