boyuanzz commented on a change in pull request #13702:
URL: https://github.com/apache/beam/pull/13702#discussion_r554269624
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File path:
runners/core-java/src/main/java/org/apache/beam/runners/core/metrics/ExecutionStateTracker.java
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@@ -44,6 +44,9 @@
private static final Map<Thread, ExecutionStateTracker> CURRENT_TRACKERS =
new ConcurrentHashMap<>();
+ private static final Map<Long, ExecutionStateTracker>
CURRENT_TRACKERS_FOR_THREAD_ID =
Review comment:
The `CURRENT_TRACKERS_FOR_THREAD_ID` seems like the same mapping as the
`CURRENT_TRACKERS`. Any reason that we cannot refer to `CURRENT_TRACKERS`?
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