Revert "Do not require changeAt to be after previous value"

This reverts commit a1bd5a9f0e9a72f24b96e08755deb6c17e0e7b41.

1 files changed, 4 insertions, 0 deletions

diff --git a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/lb/LoadBalancer.java b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/lb/LoadBalancer.java
index 26f5a148b76..6f7b7c4d57d 100644
--- a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/lb/LoadBalancer.java
+++ b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/lb/LoadBalancer.java
@@ -47,6 +47,10 @@ public class LoadBalancer {
 
     /** Returns a copy of this with state set to given state */
     public LoadBalancer with(State state, Instant changedAt) {
+        if (changedAt.isBefore(this.changedAt)) {
+            throw new IllegalArgumentException("Invalid changeAt: '" + changedAt + "' is before existing value '" +
+                                               this.changedAt + "'");
+        }
         if (this.state != State.reserved && state == State.reserved) {
             throw new IllegalArgumentException("Invalid state transition: " + this.state + " -> " + state);
         }