Don't avoid group blocking feed when groups = 1

1 files changed, 2 insertions, 1 deletions

diff --git a/container-search/src/main/java/com/yahoo/search/dispatch/Dispatcher.java b/container-search/src/main/java/com/yahoo/search/dispatch/Dispatcher.java
index 869ea6436de..9b42ce03e6d 100644
--- a/container-search/src/main/java/com/yahoo/search/dispatch/Dispatcher.java
+++ b/container-search/src/main/java/com/yahoo/search/dispatch/Dispatcher.java
@@ -249,11 +249,12 @@ public class Dispatcher extends AbstractComponent {
      * We want to avoid groups blocking feed because their data may be out of date.
      * If there is a single group blocking feed, we want to reject it.
      * If multiple groups are blocking feed we should use them anyway as we may not have remaining
-     * capacity otherwise.
+     * capacity otherwise. Same if there are no other groups.
      *
      * @return a modifiable set containing the single group to reject, or null otherwise
      */
     private Set<Integer> rejectGroupBlockingFeed(List<Group> groups) {
+        if (groups.size() == 1) return null;
         List<Group> groupsRejectingFeed = groups.stream().filter(Group::isBlockingWrites).collect(Collectors.toList());
         if (groupsRejectingFeed.size() != 1) return null;
         Set<Integer> rejected = new HashSet<>();