Try to close all databases in OnExitDatabaseCloser

h2/src/main/org/h2/engine/OnExitDatabaseCloser.java

@@ -56,6 +56,7 @@ class OnExitDatabaseCloser extends Thread {
 
     @Override
     public void run() {
+        RuntimeException root = null;
         for (Database database : DATABASES.keySet()) {
             try {
                 database.close(true);
@@ -69,10 +70,17 @@ class OnExitDatabaseCloser extends Thread {
                     // otherwise not
                 } catch (Throwable e2) {
                     e.addSuppressed(e2);
-                    throw e;
+                    if (root == null) {
+                        root = e;
+                    } else {
+                        root.addSuppressed(e);
                     }
                 }
             }
         }
+        if (root != null) {
+            throw root;
+        }
+    }
 
 }