From eecf5e64643edc166b79f36b3e9578407c4aa656 Mon Sep 17 00:00:00 2001
From: maoling <maoling@apache.org>
Date: Sun, 25 Feb 2024 01:00:00 +0800
Subject: [PATCH] CASSANDRA-19426: Fix Double Type issues in the
 Gossiper#maybeGossipToCMS

---
 src/java/org/apache/cassandra/gms/Gossiper.java | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/java/org/apache/cassandra/gms/Gossiper.java b/src/java/org/apache/cassandra/gms/Gossiper.java
index 21d4ab5b8f..d55ddf0bbe 100644
--- a/src/java/org/apache/cassandra/gms/Gossiper.java
+++ b/src/java/org/apache/cassandra/gms/Gossiper.java
@@ -844,9 +844,13 @@ public class Gossiper implements IFailureDetectionEventListener, GossiperMBean,
         if (cms.contains(getBroadcastAddressAndPort()))
             return;
 
-        double probability = cms.size() / (double) (liveEndpoints.size() + unreachableEndpoints.size());
+        int totalEndpoints = liveEndpoints.size() + unreachableEndpoints.size();
+        if (totalEndpoints == 0)
+            return;
+
+        double probability = cms.size() / (double) totalEndpoints;
         double randDbl = random.nextDouble();
-        if (randDbl <= probability)
+        if (randDbl < probability)
         {
             logger.trace("Sending GossipDigestSyn to the CMS {}", cms);
             sendGossip(message, cms);