Fix threading issue with ThreadedLRUCacheStrategy

jdereg · Feb 23, 2025 · 2c303c4 · 2c303c4
1 parent 75e88a1
commit 2c303c4
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/src/main/java/com/cedarsoftware/util/cache/ThreadedLRUCacheStrategy.java b/src/main/java/com/cedarsoftware/util/cache/ThreadedLRUCacheStrategy.java
@@ -58,7 +58,12 @@ public class ThreadedLRUCacheStrategy<K, V> implements Map<K, V> {
     private final AtomicBoolean cleanupScheduled = new AtomicBoolean(false);
 
     // Shared ScheduledExecutorService for all cache instances
-    private static final ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
+    // set thread to daemon so application can shut down properly.
+    private static final ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor(r -> {
+        Thread thread = new Thread(r, "LRUCache-Purge-Thread");
+        thread.setDaemon(true);
+        return thread;
+    });
 
     /**
      * Inner class representing a cache node with a key, value, and timestamp for LRU tracking.
@@ -298,4 +303,4 @@ public static void shutdown() {
             Thread.currentThread().interrupt();
         }
     }
-}
+}