robertwb commented on a change in pull request #14805:
URL: https://github.com/apache/beam/pull/14805#discussion_r655735752



##########
File path: 
runners/core-java/src/main/java/org/apache/beam/runners/core/metrics/MetricsContainerImpl.java
##########
@@ -84,9 +86,22 @@
   private MetricsMap<KV<MetricName, HistogramData.BucketType>, HistogramCell> 
histograms =
       new MetricsMap<>(HistogramCell::new);
 
-  /** Create a new {@link MetricsContainerImpl} associated with the given 
{@code stepName}. */
+  /**
+   * Create a new {@link MetricsContainerImpl} associated with the given 
{@code stepName}. If
+   * stepName is null, this MetricsContainer is not bound to a step.
+   */
   public MetricsContainerImpl(@Nullable String stepName) {
     this.stepName = stepName;
+    this.isProcessWide = false;

Review comment:
       I must have been looking at a previous iteration of this code (or 
getting it mixed up with others). 




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