From 8b092951cbd10880ca2bf33c8feedadd580d5268 Mon Sep 17 00:00:00 2001
From: Phsm Qwerty <phsm@users.noreply.github.com>
Date: Fri, 7 Mar 2025 06:26:43 +0100
Subject: [PATCH] prometheus: don't poll the same tag multiple times (#10450)

---
 .../org/apache/cloudstack/metrics/PrometheusExporterImpl.java  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/integrations/prometheus/src/main/java/org/apache/cloudstack/metrics/PrometheusExporterImpl.java b/plugins/integrations/prometheus/src/main/java/org/apache/cloudstack/metrics/PrometheusExporterImpl.java
index e5dc0b29171..32ec2f53211 100644
--- a/plugins/integrations/prometheus/src/main/java/org/apache/cloudstack/metrics/PrometheusExporterImpl.java
+++ b/plugins/integrations/prometheus/src/main/java/org/apache/cloudstack/metrics/PrometheusExporterImpl.java
@@ -19,6 +19,7 @@ package org.apache.cloudstack.metrics;
 import java.math.BigDecimal;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
@@ -302,7 +303,7 @@ public class PrometheusExporterImpl extends ManagerBase implements PrometheusExp
                 .flatMap( h -> _hostTagsDao.getHostTags(h).stream())
                 .distinct()
                 .collect(Collectors.toList());
-        List<String> allHostTags = new ArrayList<>();
+        HashSet<String> allHostTags = new HashSet<>();
         allHostTagVOS.forEach(hostTagVO -> allHostTags.add(hostTagVO.getTag()));
 
         for (final State state : State.values()) {