diff --git a/core/src/main/java/org/elasticsearch/discovery/zen/ZenDiscovery.java b/core/src/main/java/org/elasticsearch/discovery/zen/ZenDiscovery.java
index 607f8d34db1..596e40abfba 100644
--- a/core/src/main/java/org/elasticsearch/discovery/zen/ZenDiscovery.java
+++ b/core/src/main/java/org/elasticsearch/discovery/zen/ZenDiscovery.java
@@ -832,7 +832,7 @@ public class ZenDiscovery extends AbstractLifecycleComponent<Discovery> implemen
             try {
                 membership.sendValidateJoinRequestBlocking(node, state, joinTimeout);
             } catch (Throwable e) {
-                logger.warn("failed to validate incoming join request from node [{}]", node);
+                logger.warn("failed to validate incoming join request from node [{}]", e, node);
                 callback.onFailure(new IllegalStateException("failure when sending a validation request to node", e));
                 return;
             }