steveniemitz commented on a change in pull request #15235:
URL: https://github.com/apache/beam/pull/15235#discussion_r682693344



##########
File path: 
runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/WindmillStateInternals.java
##########
@@ -474,9 +474,12 @@ private WindmillValue(
 
     @Override
     public void clear() {
-      modified = true;
+      // if the value was already null (because it was already cleared) then 
there's no need to

Review comment:
       reverted




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