Only donload url config on containers - not config server

2 files changed, 10 insertions, 4 deletions

diff --git a/config/src/main/java/com/yahoo/vespa/config/ConfigPayloadApplier.java b/config/src/main/java/com/yahoo/vespa/config/ConfigPayloadApplier.java
index 9cd9a7c0981..5c0e9539f4f 100644
--- a/config/src/main/java/com/yahoo/vespa/config/ConfigPayloadApplier.java
+++ b/config/src/main/java/com/yahoo/vespa/config/ConfigPayloadApplier.java
@@ -273,8 +273,14 @@ public class ConfigPayloadApplier<T extends ConfigInstance.Builder> {
 
             // Need to convert url into actual file if 'url' type is used
             } else if (isUrlField(builder, methodName)) {
-                UrlReference url = resolveUrl(Utf8.toString(value.asUtf8()));
-                invokeSetter(builder, methodName, url);
+                String url = Utf8.toString(value.asUtf8());
+                if (url == null || url.length() == 0) {
+                    invokeSetter(builder, methodName, "");
+                } else  {
+                    UrlReference urlref = resolveUrl(Utf8.toString(value.asUtf8()));
+                    invokeSetter(builder, methodName, urlref);
+                }
+
 
             } else {
                 Object object = getValueFromInspector(value);
@@ -294,7 +300,7 @@ public class ConfigPayloadApplier<T extends ConfigInstance.Builder> {
 
     private UrlReference resolveUrl(String url) {
         if (urlDownloader == null) {
-            throw new RuntimeException("Resolving url field failed due to missing URL downloader.");
+            return new UrlReference(url);  // assuming config server - just return the actual url.
         }
         File file = urlDownloader.waitFor(new UrlReference(url), 60 * 60);
         return new UrlReference(file.getAbsolutePath());
diff --git a/config/src/main/java/com/yahoo/vespa/config/ConfigTransformer.java b/config/src/main/java/com/yahoo/vespa/config/ConfigTransformer.java
index 3d3a27da713..9ececb71c56 100644
--- a/config/src/main/java/com/yahoo/vespa/config/ConfigTransformer.java
+++ b/config/src/main/java/com/yahoo/vespa/config/ConfigTransformer.java
@@ -28,7 +28,7 @@ public class ConfigTransformer<T extends ConfigInstance> {
     private final Class<T> clazz;
 
     private static volatile PathAcquirer pathAcquirer = new IdentityPathAcquirer();
-    private static volatile UrlDownloader urlDownloader;
+    private static volatile UrlDownloader urlDownloader = null;
 
     /**
      * For internal use only *