requires synchronized

Author: baltzell

common-tools/clas-detector/src/main/java/org/jlab/detector/decode/CLASDecoderPool.java

@@ -34,7 +34,7 @@ public CLASDecoderPool(int size, String variation, String timestamp) {
 
     volatile static CLASDecoderPool instance = null;
 
-    public static CLASDecoderPool getInstance() {
+    public static synchronized CLASDecoderPool getInstance() {
         if (instance == null) 
             instance = new CLASDecoderPool(64,"default",null);
         return instance;