From 43eb2a4bdee169e0f9338afab4f70009604997b2 Mon Sep 17 00:00:00 2001
From: Marcus Eriksson <marcuse@apache.org>
Date: Tue, 16 Jan 2024 14:13:27 +0100
Subject: [PATCH] Avoid trying to get replication factor for
 system_cluster_metadata before we have a CMS

Patch by marcuse; reviewed by Sam Tunnicliffe for CASSANDRA-19269
---
 src/java/org/apache/cassandra/locator/MetaStrategy.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/java/org/apache/cassandra/locator/MetaStrategy.java b/src/java/org/apache/cassandra/locator/MetaStrategy.java
index ac9685227e..a16d4e68bb 100644
--- a/src/java/org/apache/cassandra/locator/MetaStrategy.java
+++ b/src/java/org/apache/cassandra/locator/MetaStrategy.java
@@ -60,7 +60,9 @@ public class MetaStrategy extends SystemStrategy
     @Override
     public ReplicationFactor getReplicationFactor()
     {
-        ClusterMetadata metadata = ClusterMetadata.current();
+        ClusterMetadata metadata = ClusterMetadata.currentNullable();
+        if (metadata == null || metadata.epoch.isEqualOrBefore(Epoch.FIRST))
+            return ReplicationFactor.fullOnly(1);
         int rf = metadata.placements.get(ReplicationParams.meta(metadata)).writes.forRange(entireRange).get().byEndpoint.size();
         return ReplicationFactor.fullOnly(rf);
     }