must check variable inside synchronized region

1 files changed, 3 insertions, 0 deletions

diff --git a/vespalog/src/main/java/com/yahoo/log/VespaLevelControllerRepo.java b/vespalog/src/main/java/com/yahoo/log/VespaLevelControllerRepo.java
index a3a69e8f4ed..5e75b10b302 100644
--- a/vespalog/src/main/java/com/yahoo/log/VespaLevelControllerRepo.java
+++ b/vespalog/src/main/java/com/yahoo/log/VespaLevelControllerRepo.java
@@ -155,6 +155,9 @@ public class VespaLevelControllerRepo implements LevelControllerRepo {
                 return ctrl;
             }
             synchronized(this) {
+                if (ctlFile == null) {
+                    return defaultLevelCtrl;
+                }
                 LevelController inherit = null;
 
                 int lastdot = suffix.lastIndexOf('.');