dubbo-metrics/dubbo-tracing/src/main/java/org/apache/dubbo/tracing/filter/ObservationSenderFilter.java [73:82]:
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    public void onResponse(Result appResponse, Invoker<?> invoker, Invocation invocation) {
        final Observation observation = getObservation(invocation);
        if (observation == null) {
            return;
        }
        if (appResponse != null && appResponse.hasException()) {
            observation.error(appResponse.getException());
        }
        observation.stop();
    }
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dubbo-metrics/dubbo-tracing/src/main/java/org/apache/dubbo/tracing/filter/ObservationReceiverFilter.java [72:81]:
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    public void onResponse(Result appResponse, Invoker<?> invoker, Invocation invocation) {
        final Observation observation = getObservation(invocation);
        if (observation == null) {
            return;
        }
        if (appResponse != null && appResponse.hasException()) {
            observation.error(appResponse.getException());
        }
        observation.stop();
    }
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