Destroy only when held item exists

1 files changed, 4 insertions, 2 deletions

diff --git a/container-messagebus/src/main/java/com/yahoo/container/jdisc/messagebus/NetworkMultiplexerHolder.java b/container-messagebus/src/main/java/com/yahoo/container/jdisc/messagebus/NetworkMultiplexerHolder.java
index 3c465835589..89ecc931efb 100644
--- a/container-messagebus/src/main/java/com/yahoo/container/jdisc/messagebus/NetworkMultiplexerHolder.java
+++ b/container-messagebus/src/main/java/com/yahoo/container/jdisc/messagebus/NetworkMultiplexerHolder.java
@@ -38,8 +38,10 @@ public class NetworkMultiplexerHolder extends AbstractComponent {
     @Override
     public void deconstruct() {
         synchronized (monitor) {
-            net.destroy();
-            net = null;
+            if (net != null) {
+                net.destroy();
+                net = null;
+            }
             destroyed = true;
         }
     }