li4wang commented on code in PR #2279:
URL: https://github.com/apache/zookeeper/pull/2279#discussion_r2298937582
##########
zookeeper-metrics-providers/zookeeper-prometheus-metrics/src/main/java/org/apache/zookeeper/metrics/prometheus/PrometheusMetricsProvider.java:
##########
@@ -714,14 +714,21 @@ public Thread newThread(final Runnable runnable) {
}
}
+ private static class PrometheusRejectedExecutionHandler implements
RejectedExecutionHandler {
+ private static boolean maxQueueSizeExceeded = false;
+
+ @Override
+ public void rejectedExecution(final Runnable r, final
ThreadPoolExecutor e) {
+ if (!maxQueueSizeExceeded) {
+ maxQueueSizeExceeded = true;
+ LOG.warn("Prometheus metrics queue size exceeded the max");
Review Comment:
- Enhanced `RateLogger ` reduce string concatenation overhead.
- Added the rate logger back to visibility when exceeding max happens
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