Make sure readOnly field is initialized

Make sure the readOnly field is forced to be initialed to null
by making it a volatile.

Change-Id: I366835a8009fe6fe21992b374f959bfcefcde18e
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

diff --git a/common/util/src/main/java/org/opendaylight/yangtools/util/ReadOnlyTrieMap.java b/common/util/src/main/java/org/opendaylight/yangtools/util/ReadOnlyTrieMap.java
index 2407ed7ad1fc5bbf4af360ecb9cdd2735bb83d55..a993b85e0af1a6a4af1e42f7f253608f748e2b00 100644 (file)
--- a/common/util/src/main/java/org/opendaylight/yangtools/util/ReadOnlyTrieMap.java
+++ b/common/util/src/main/java/org/opendaylight/yangtools/util/ReadOnlyTrieMap.java
@@ -41,7 +41,7 @@ final class ReadOnlyTrieMap<K, V> extends ForwardingMap<K, V> {
 
     // Used via the varhandle
     @SuppressWarnings("unused")
-    private ImmutableTrieMap<K, V> readOnly;
+    private volatile ImmutableTrieMap<K, V> readOnly;
 
     ReadOnlyTrieMap(final MutableTrieMap<K, V> map, final int size) {
         this.readWrite = requireNonNull(map);