Add some more logging for file distribution connects

Sometimes seeing some request fail after a very short time with connection
error, not sure what causes it, trying to debug

2 files changed, 6 insertions, 3 deletions

diff --git a/config/src/main/java/com/yahoo/vespa/config/JRTConnection.java b/config/src/main/java/com/yahoo/vespa/config/JRTConnection.java
index c1fc50f6a82..f731d49941a 100644
--- a/config/src/main/java/com/yahoo/vespa/config/JRTConnection.java
+++ b/config/src/main/java/com/yahoo/vespa/config/JRTConnection.java
@@ -53,6 +53,7 @@ public class JRTConnection implements Connection {
         if (target == null || !target.isValid()) {
             logger.log(Level.INFO, "Connecting to " + address);
             target = supervisor.connect(new Spec(address));
+            logger.log(Level.FINE, "Connected to " + address);
         }
         return target;
     }
diff --git a/filedistribution/src/main/java/com/yahoo/vespa/filedistribution/FileReferenceDownloader.java b/filedistribution/src/main/java/com/yahoo/vespa/filedistribution/FileReferenceDownloader.java
index 6bace104d88..e3edee2956f 100644
--- a/filedistribution/src/main/java/com/yahoo/vespa/filedistribution/FileReferenceDownloader.java
+++ b/filedistribution/src/main/java/com/yahoo/vespa/filedistribution/FileReferenceDownloader.java
@@ -92,7 +92,8 @@ public class FileReferenceDownloader {
 
     private boolean startDownloadRpc(FileReferenceDownload fileReferenceDownload, int retryCount, Connection connection) {
         Request request = createRequest(fileReferenceDownload);
-        connection.invokeSync(request, rpcTimeout(retryCount).getSeconds());
+        Duration rpcTimeout = rpcTimeout(retryCount);
+        connection.invokeSync(request, rpcTimeout.getSeconds());
 
         Level logLevel = (retryCount > 3 ? Level.INFO : Level.FINE);
         FileReference fileReference = fileReferenceDownload.fileReference();
@@ -107,8 +108,9 @@ public class FileReferenceDownloader {
             }
         } else {
             log.log(logLevel, "Downloading " + fileReference + " from " + connection.getAddress() + " failed: " +
-                    request + ", error: " + request.errorMessage() + ", will switch config server for next request" +
-                    " (retry " + retryCount + ", rpc timeout " + rpcTimeout(retryCount) + ")");
+                    request + ", error: " + request.errorCode() + "(" + request.errorMessage() +
+                    "). Will switch config server for next request" +
+                    " (retry " + retryCount + ", rpc timeout " + rpcTimeout + ")");
             return false;
         }
     }