From a12ae8ad241dc70828ba2132dc8ccaaea7f990a5 Mon Sep 17 00:00:00 2001
From: CalDescent <caldescent@protonmail.com>
Date: Wed, 9 Mar 2022 19:46:50 +0000
Subject: [PATCH] Hopeful fix for ConcurrentModificationException in
 BlockArchiveReader.getFilenameForHeight()

---
 src/main/java/org/qortal/repository/BlockArchiveReader.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/qortal/repository/BlockArchiveReader.java b/src/main/java/org/qortal/repository/BlockArchiveReader.java
index b6d7cdd6..8ec3a42e 100644
--- a/src/main/java/org/qortal/repository/BlockArchiveReader.java
+++ b/src/main/java/org/qortal/repository/BlockArchiveReader.java
@@ -63,7 +63,9 @@ public class BlockArchiveReader {
                 map.put(filename, new Triple(startHeight, endHeight, range));
             }
         }
-        this.fileListCache = map;
+        synchronized (this.fileListCache) {
+            this.fileListCache = map;
+        }
     }
 
     public Triple<BlockData, List<TransactionData>, List<ATStateData>> fetchBlockAtHeight(int height) {