1 files changed, 8 insertions, 5 deletions

diff --git a/config-model/src/main/java/com/yahoo/vespa/model/application/validation/ComplexFieldsWithStructFieldIndexesValidator.java b/config-model/src/main/java/com/yahoo/vespa/model/application/validation/ComplexFieldsWithStructFieldIndexesValidator.java
index a18ce7e245d..fdd71ebccc5 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/application/validation/ComplexFieldsWithStructFieldIndexesValidator.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/application/validation/ComplexFieldsWithStructFieldIndexesValidator.java
@@ -1,6 +1,7 @@
 // Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.vespa.model.application.validation;
 
+import com.yahoo.config.application.api.DeployLogger;
 import com.yahoo.config.model.deploy.DeployState;
 import com.yahoo.schema.Schema;
 import com.yahoo.schema.document.ImmutableSDField;
@@ -9,6 +10,7 @@ import com.yahoo.vespa.model.VespaModel;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
+import java.util.logging.Level;
 import java.util.stream.Collectors;
 
 /**
@@ -28,21 +30,22 @@ public class ComplexFieldsWithStructFieldIndexesValidator extends Validator {
                 continue;
             }
             for (var spec : cluster.schemas().values()) {
-                validateComplexFields(cluster.getClusterName(), spec.fullSchema());
+                validateComplexFields(cluster.getClusterName(), spec.fullSchema(), deployState.getDeployLogger());
             }
         }
     }
 
-    private static void validateComplexFields(String clusterName, Schema schema) {
+    private static void validateComplexFields(String clusterName, Schema schema, DeployLogger logger) {
         String unsupportedFields = schema.allFields()
                 .filter(field -> hasStructFieldsWithIndex(field))
                 .map(ComplexFieldsWithStructFieldIndexesValidator::toString)
                 .collect(Collectors.joining(", "));
 
         if (!unsupportedFields.isEmpty()) {
-            throw new IllegalArgumentException(
-                    String.format("For cluster '%s', schema '%s': The following complex fields have struct fields with 'indexing: index' which is not supported: %s. " +
-                                  "Change to 'indexing: attribute' instead",
+            // TODO (Vespa 9 or before): Change back to an exception when no applications are using it wrong.
+            logger.logApplicationPackage(Level.WARNING,
+                    String.format("For cluster '%s', schema '%s': The following complex fields have struct fields with 'indexing: index' which is not supported and has no effect: %s. " +
+                                  "Remove setting or change to 'indexing: attribute' if needed for matching.",
                                   clusterName, schema.getName(), unsupportedFields));
         }
     }