MVTableEngine

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

@@ -1381,6 +1381,9 @@ public class Session extends SessionWithState {
      */
     public Transaction getTransaction() {
         if (transaction == null) {
+            if (database.getMvStore().getStore().isClosed()) {
+                throw DbException.get(ErrorCode.OBJECT_CLOSED);
+            }
             transaction = database.getMvStore().getTransactionStore().begin();
             startStatement = -1;
         }

h2/src/main/org/h2/mvstore/MVStore.java

@@ -49,6 +49,8 @@ MVTableEngine:
 - use StreamStore
 - when the MVStore was enabled before, use it again
     (probably by checking existence of the mvstore file)
+- not use the .h2.db file
+- not use the .lock.db file
 
 TransactionStore:
 
@@ -566,7 +568,7 @@ public class MVStore {
             try {
                 check = (int) Long.parseLong(f, 16);
             } catch (NumberFormatException e) {
-                check = -1;
+                continue;
             }
             s = s.substring(0, s.lastIndexOf("fletcher") - 1);
             byte[] bytes = s.getBytes(DataUtils.UTF8);