Error in EM while upgrading on farm the application, leading to unapp…

…lied migration #170 (#171)
xwikisas · Oct 16, 2020 · 23e3f56 · 23e3f56
1 parent 81cb3e7
commit 23e3f56
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/...tion-diagram-api/src/main/java/com/xwiki/diagram/internal/DiagramApplicationListener.java b/...tion-diagram-api/src/main/java/com/xwiki/diagram/internal/DiagramApplicationListener.java
@@ -77,7 +77,8 @@ public void onEvent(Event event, Object source, Object data)
 
     private Collection<String> getTargetWikis(ExtensionEvent event)
     {
-        if (event.hasNamespace() && event.getNamespace().startsWith("wiki:")) {
+        // Checking also for null namespace since it could mean that the upgrade is done on farm level.
+        if (event.hasNamespace() && event.getNamespace() != null && event.getNamespace().startsWith("wiki:")) {
             return Collections.singleton(event.getNamespace().substring(5));
         } else {
             try {