arvindram03 commented on code in PR #30693:
URL: https://github.com/apache/beam/pull/30693#discussion_r1566512976
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runners/core-java/src/main/java/org/apache/beam/runners/core/metrics/ExecutionStateTracker.java:
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@@ -139,8 +140,17 @@ public String getDescription() {
*/
private volatile long millisSinceLastTransition = 0;
+ /**
+ * The number of milliseconds since the {@link ExecutionStateTracker}
initial state.
+ *
+ * <p>This variable is updated by the Sampling thread, and read by the
Progress Reporting thread,
+ * thus it being marked volatile.
+ */
+ private volatile long millisSinceBundleStart = 0;
Review Comment:
Following similar pattern from millisSinceLastTransition
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