Log number of active threads

1 files changed, 3 insertions, 0 deletions

diff --git a/configserver/src/main/java/com/yahoo/vespa/config/server/filedistribution/FileServer.java b/configserver/src/main/java/com/yahoo/vespa/config/server/filedistribution/FileServer.java
index f34beae9c46..6f0f128e360 100644
--- a/configserver/src/main/java/com/yahoo/vespa/config/server/filedistribution/FileServer.java
+++ b/configserver/src/main/java/com/yahoo/vespa/config/server/filedistribution/FileServer.java
@@ -30,6 +30,7 @@ import java.nio.file.Path;
 import java.util.List;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadPoolExecutor;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -153,6 +154,8 @@ public class FileServer {
     }
 
     public void serveFile(String fileReference, boolean downloadFromOtherSourceIfNotFound, Request request, Receiver receiver) {
+        if (executor instanceof ThreadPoolExecutor)
+            log.log(Level.FINE, () -> "Active threads is now " + ((ThreadPoolExecutor) executor).getActiveCount());
         executor.execute(() -> serveFileInternal(fileReference, downloadFromOtherSourceIfNotFound, request, receiver));
     }