scwhittle commented on a change in pull request #16537:
URL: https://github.com/apache/beam/pull/16537#discussion_r786645321
##########
File path:
sdks/java/fn-execution/src/main/java/org/apache/beam/sdk/fn/data/BeamFnDataInboundObserver2.java
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@@ -62,6 +62,9 @@ public static BeamFnDataInboundObserver2 forConsumers(
private final Map<String, Map<String, EndpointStatus<TimerEndpoint<?>>>>
transformIdToTimerFamilyIdToTimerEndpoint;
private final CancellableQueue<BeamFnApi.Elements> queue;
+ // Share an exception used for close as constructing exception stack traces
is expensive.
+ private static final Exception closeException =
Review comment:
Created a subclass
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