Singleton

h2/src/main/org/h2/security/auth/AuthenticatorFactory.java

@@ -11,6 +11,6 @@ package org.h2.security.auth;
 public class AuthenticatorFactory {
 
     public static Authenticator createAuthenticator() {
-        return new DefaultAuthenticator();
+        return DefaultAuthenticator.getInstance();
     }
 }

h2/src/main/org/h2/security/auth/DefaultAuthenticator.java

@@ -66,6 +66,12 @@ public class DefaultAuthenticator implements Authenticator {
 
     boolean initialized;
 
+    private static final DefaultAuthenticator INSTANCE = new DefaultAuthenticator();
+
+    protected static final DefaultAuthenticator getInstance() {
+        return INSTANCE;
+    }
+
     /**
      * Create the Authenticator with default configurations
      */