The database now tries to detect if the classloader or virtual machine has almost shut down.

h2/src/main/org/h2/util/Resources.java

@@ -78,4 +78,9 @@ public class Resources {
         }
         return data == null ? new byte[0] : data;
     }
+    
+    static boolean isShutdown() {
+        return FILES == null;
+    }
+    
 }

h2/src/main/org/h2/util/StringCache.java

@@ -140,4 +140,8 @@ public class StringCache {
         softCache = new SoftReference(null);
     }
 
+    static boolean isShutdown() {
+        return softCache == null;
+    }
+
 }