From be40b7a3e56e8675e414980472c2d52919fc0386 Mon Sep 17 00:00:00 2001
From: Matthew Leon <ml@matthewleon.com>
Date: Mon, 25 Mar 2019 22:14:32 -0400
Subject: [PATCH] NetworkParameters: Make double-checked locking on
 defaultSerializer safe with volatile keyword.

---
 core/src/main/java/org/bitcoinj/core/NetworkParameters.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/java/org/bitcoinj/core/NetworkParameters.java b/core/src/main/java/org/bitcoinj/core/NetworkParameters.java
index 8be5c36d..2dc8d8bf 100644
--- a/core/src/main/java/org/bitcoinj/core/NetworkParameters.java
+++ b/core/src/main/java/org/bitcoinj/core/NetworkParameters.java
@@ -107,7 +107,7 @@ public abstract class NetworkParameters {
     protected int[] addrSeeds;
     protected HttpDiscovery.Details[] httpSeeds = {};
     protected Map<Integer, Sha256Hash> checkpoints = new HashMap<>();
-    protected transient MessageSerializer defaultSerializer = null;
+    protected volatile transient MessageSerializer defaultSerializer = null;
 
     protected NetworkParameters() {
         alertSigningKey = SATOSHI_KEY;