GenericJMX: fix potential dereference after NPE

Fixes CID #41723

diff --git a/bindings/java/org/collectd/java/GenericJMXConfConnection.java b/bindings/java/org/collectd/java/GenericJMXConfConnection.java
index aced54b..887c289 100644 (file)
--- a/bindings/java/org/collectd/java/GenericJMXConfConnection.java
+++ b/bindings/java/org/collectd/java/GenericJMXConfConnection.java
@@ -137,7 +137,9 @@ class GenericJMXConfConnection
   {
     try
     {
-      this._jmx_connector.close();
+      if (this._jmx_connector != null) {
+        this._jmx_connector.close();
+      }
     }
     catch (Exception e)
     {