INFO log when config will no longer be updated because of expected restart

1 files changed, 5 insertions, 1 deletions

diff --git a/config/src/main/java/com/yahoo/config/subscription/ConfigSubscriber.java b/config/src/main/java/com/yahoo/config/subscription/ConfigSubscriber.java
index bbad22e52e8..66614a3da4e 100644
--- a/config/src/main/java/com/yahoo/config/subscription/ConfigSubscriber.java
+++ b/config/src/main/java/com/yahoo/config/subscription/ConfigSubscriber.java
@@ -293,7 +293,11 @@ public class ConfigSubscriber implements AutoCloseable {
 
             if (applyOnRestartOnly && ! isInitializing) { // disable any reconfig until restart
                 synchronized (monitor) {
-                    applyOnRestart = applyOnRestartOnly;
+                    if ( ! applyOnRestart) {
+                        log.log(Level.INFO, "Config generation " + generation + " requires restart; " +
+                                            "further config changes will not take effect until restart");
+                        applyOnRestart = true;
+                    }
                 }
             }