Log when a cluster state version is published

Makes it much easier to reason about which state transitions have been
made visible in the cluster, and which ones have just been internal
state transitions in the controller.

1 files changed, 1 insertions, 0 deletions

diff --git a/clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/SystemStateBroadcaster.java b/clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/SystemStateBroadcaster.java
index 5c035a0d5a7..024c5d21607 100644
--- a/clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/SystemStateBroadcaster.java
+++ b/clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/SystemStateBroadcaster.java
@@ -134,6 +134,7 @@ public class SystemStateBroadcaster {
         if (systemState == null) return false;
 
         if (!systemState.isOfficial()) {
+            log.log(LogLevel.INFO, String.format("Publishing cluster state version %d", systemState.getVersion()));
             systemState.setOfficial(true);
         }