The SQL statement "shutdown defag" could corrupt the database if the process was…

The SQL statement "shutdown defag" could corrupt the database if the process was killed while the shutdown was in progress. The same problem could occur when the database setting "defrag_always" was used.

h2/src/main/org/h2/store/PageStore.java

@@ -510,6 +510,7 @@ public class PageStore implements CacheWriter {
             }
         }
         if (isDefrag) {
+            log.checkpoint();
             writeBack();
             cache.clear();
             ArrayList<Table> tables = database.getAllTablesAndViews(false);
@@ -538,6 +539,8 @@ public class PageStore implements CacheWriter {
             int target = MIN_PAGE_COUNT - 1;
             int temp = 0;
             for (int i = 0, size = recordedPagesList.size(); i < size; i++) {
+                log.checkpoint();
+                writeBack();
                 int source = recordedPagesList.get(i);
                 Page pageSource = getPage(source);
                 if (!pageSource.canMove()) {