--- jk_isapi_plugin.c	(revision 474505)
+++ jk_isapi_plugin.c	(working copy)
@@ -1455,12 +1455,24 @@ 
 
     DWORD huge_buf_sz;
 
+    /* There have been several times where flags added to jk_ws_service_t have not had initialisers added here
+       resulting in seriously broken performance. Try to catch these so we can ensure it doesn't happen silently. */
+    if (sizeof(jk_ws_service_t) != 172) {
+        jk_log(logger, JK_LOG_WARNING, "Definition of jk_ws_service_t has changed (size is now %u). Please check that it is initialised correctly in init_ws_service.", sizeof(jk_ws_service_t));
+    }
+
     s->jvm_route = NULL;
 
     s->start_response = start_response;
     s->read = read;
     s->write = write;
+
+    /* Yes we do want to reuse AJP connections */
+    s->disable_reuse = JK_FALSE;
+
     s->flush = NULL;
+    s->flush_packets = JK_FALSE;
+    s->flush_header = JK_FALSE;
 
     /* Clear RECO status */
     s->reco_status = RECO_NONE;