From 284dd7bed4934018e613baa8d25a12960669c408 Mon Sep 17 00:00:00 2001
From: Neeharika Sompalli
 <52669918+Neeharika-Sompalli@users.noreply.github.com>
Date: Sat, 13 Jan 2024 20:18:38 -0600
Subject: [PATCH] fix: (mod-service)Use concurrent read cache (#10965)

Signed-off-by: Michael Tinker <michael.tinker@swirldslabs.com>
Co-authored-by: Michael Tinker <michael.tinker@swirldslabs.com>
---
 .../java/com/hedera/node/app/spi/state/ReadableKVStateBase.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hedera-node/hedera-app-spi/src/main/java/com/hedera/node/app/spi/state/ReadableKVStateBase.java b/hedera-node/hedera-app-spi/src/main/java/com/hedera/node/app/spi/state/ReadableKVStateBase.java
index 4d5548365ae4..a5619ad5dd31 100644
--- a/hedera-node/hedera-app-spi/src/main/java/com/hedera/node/app/spi/state/ReadableKVStateBase.java
+++ b/hedera-node/hedera-app-spi/src/main/java/com/hedera/node/app/spi/state/ReadableKVStateBase.java
@@ -38,7 +38,7 @@ public abstract class ReadableKVStateBase<K, V> implements ReadableKVState<K, V>
      * changed before we got to handle transaction. If the value is "null", this means it was NOT
      * FOUND when we looked it up.
      */
-    private final Map<K, V> readCache = new HashMap<>();
+    private final Map<K, V> readCache = Collections.synchronizedMap(new HashMap<>());
 
     private final Set<K> unmodifiableReadKeys = Collections.unmodifiableSet(readCache.keySet());