Log all known versions when unable to find model factory for a version

1 files changed, 2 insertions, 1 deletions

diff --git a/configserver/src/main/java/com/yahoo/vespa/config/server/modelfactory/ModelFactoryRegistry.java b/configserver/src/main/java/com/yahoo/vespa/config/server/modelfactory/ModelFactoryRegistry.java
index b2b5a06b6ea..d4574b3343b 100644
--- a/configserver/src/main/java/com/yahoo/vespa/config/server/modelfactory/ModelFactoryRegistry.java
+++ b/configserver/src/main/java/com/yahoo/vespa/config/server/modelfactory/ModelFactoryRegistry.java
@@ -42,7 +42,8 @@ public class ModelFactoryRegistry {
      */
     public ModelFactory getFactory(Version version) {
         if ( ! factories.containsKey(version))
-            throw new UnknownVespaVersionException("Unknown Vespa version '" + version + "', cannot build config model for this version");
+            throw new UnknownVespaVersionException("Unknown Vespa version '" + version +
+                                                   "', cannot build config model for this version, known versions: " + allVersions());
         return factories.get(version);
     }