stevehof commented on a change in pull request #32:
URL: https://github.com/apache/commons-daemon/pull/32#discussion_r699137461



##########
File path: src/native/windows/src/handles.c
##########
@@ -496,13 +496,15 @@ apxCloseHandle(APXHANDLE hObject)
 
     if (IS_INVALID_HANDLE(hObject) || hObject->dwType == 
APXHANDLE_TYPE_INVALID)
         return FALSE;
-    /* Call the user callback first */
-    (*hObject->fnCallback)(hObject, WM_CLOSE, 0, 0);
-    /* Now go through the callback chain */
-    TAILQ_FOREACH(lpCall, &hObject->lCallbacks, queue) {
+    if (!TAILQ_EMPTY(&hObject->lCallbacks)) {
+        /* Call the user callback first */
+        (*hObject->fnCallback)(hObject, WM_CLOSE, 0, 0);

Review comment:
       This would also throw an access violation, i believe in the JVM.dll 
which is with a version i do not have pdb files for. I tested this on master 
with the current 1.2.5 fixes and this could also likely be caused by code from 
the java side of things. I do not have a good understanding of the issues here 
but i do know that lCallbacks was empty and that fnCallback would also raise an 
access violation. What are these meant to be calling? I presume something in 
the java, however i could not find any documentation, and this is the only 
"issue" to an otherwise well running service.




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