From 18d05361eed887f038c9b01b593dad56ea00ff1c Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Thu, 20 Apr 2023 22:11:51 +0200
Subject: [PATCH] NEU

---
 .../chat/backend/persistence/kafka/ChatMessageChannel.java     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatMessageChannel.java b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatMessageChannel.java
index 084986c8..ac30f1d3 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatMessageChannel.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/ChatMessageChannel.java
@@ -60,6 +60,9 @@ public class ChatMessageChannel implements Runnable, ConsumerRebalanceListener
     this.currentOffset = new long[numShards];
     this.nextOffset = new long[numShards];
     this.chatrooms = new Map[numShards];
+    IntStream
+        .range(0, numShards)
+        .forEach(shard -> this.chatrooms[shard] = new HashMap<>());
     this.shardingStrategy = new KafkaLikeShardingStrategy(numShards);
   }
 
-- 
2.20.1