Ignore fire plugin state event without state change

1 files changed, 5 insertions, 0 deletions

diff --git a/pf4j/src/main/java/org/pf4j/AbstractPluginManager.java b/pf4j/src/main/java/org/pf4j/AbstractPluginManager.java
index af7c106..2f0d210 100644
--- a/pf4j/src/main/java/org/pf4j/AbstractPluginManager.java
+++ b/pf4j/src/main/java/org/pf4j/AbstractPluginManager.java
@@ -861,6 +861,11 @@ public abstract class AbstractPluginManager implements PluginManager {
      * @param event the plugin state event
      */
     protected synchronized void firePluginStateEvent(PluginStateEvent event) {
+        if (event.getPluginState() == event.getOldState()) {
+            // ignore events without state change
+            return;
+        }
+
         for (PluginStateListener listener : pluginStateListeners) {
             log.trace("Fire '{}' to '{}'", event, listener);
             listener.pluginStateChanged(event);