gortiz commented on code in PR #15189:
URL: https://github.com/apache/pinot/pull/15189#discussion_r1987217776
##########
pinot-integration-tests/src/test/java/org/apache/pinot/integration/tests/JmxMetricsIntegrationTest.java:
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@@ -138,6 +153,39 @@ public void testMultiStageMigrationMetric() throws
Exception {
assertEquals((Long) MBEAN_SERVER.getAttribute(multiStageMigrationMetric,
"Count"), 6L);
}
+ @Test
+ public void testEstimatedMseServerThreadsBrokerMetric() throws Exception {
+ ObjectName estimatedMseServerThreadsMetric = new
ObjectName(PINOT_JMX_METRICS_DOMAIN,
+ new Hashtable<>(Map.of("type", BROKER_METRICS_TYPE,
+ "name", "\"pinot.broker.estimatedMseServerThreads\"")));
+
+ assertEquals((Long)
MBEAN_SERVER.getAttribute(estimatedMseServerThreadsMetric, "Value"), 0L);
+
+ ExecutorService executorService = Executors.newSingleThreadExecutor();
+
+ executorService.submit(() -> {
+ while (true) {
+ try {
+ postQuery(
+ "SET useMultiStageEngine=true; SELECT AirlineID, AVG(ArrDelay)
FILTER (WHERE ArrDelay > 0) FROM mytable"
+ + " GROUP BY AirlineID;");
Review Comment:
Nit: You can use the sleep function to be sure the query keeps running for a
while, increasing the chance of finding a thread running in the check below.
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