vmlens: fix race conditions on nextAnalyze and changesSinceAnalyze

h2/src/main/org/h2/mvstore/db/MVTable.java

@@ -727,6 +727,7 @@ public class MVTable extends TableBase {
     }
 
     private void analyzeIfRequired(Session session) {
+        synchronized (this) {
             if (nextAnalyze == 0 || nextAnalyze > changesSinceAnalyze++) {
                 return;
             }
@@ -735,6 +736,7 @@ public class MVTable extends TableBase {
             if (n > 0) {
                 nextAnalyze = n;
             }
+        }
         session.markTableForAnalyze(this);
     }