commit c2fd34cb2f81e795dae211466edd270613cb6543
Author: Andrew Beekhof <andrew@beekhof.net>
Date:   Thu Apr 10 14:50:19 2014 +1000

    Fix: PE: Do not unfence nodes that are offline, unclean or shutting down
    
    (cherry picked from commit 12c410557f7685366d8504e57e555624bc6f2a07)

diff --git a/lib/pengine/utils.c b/lib/pengine/utils.c
index 9cb744a..ccaaa3f 100644
--- a/lib/pengine/utils.c
+++ b/lib/pengine/utils.c
@@ -1877,7 +1877,10 @@ trigger_unfencing(
         /* Wasnt a stonith device */
         return;
 
-    } else if(node) {
+    } else if(node
+              && node->details->online
+              && node->details->unclean == FALSE
+              && node->details->shutdown == FALSE) {
         action_t *unfence = pe_fence_op(node, "on", FALSE, data_set);
 
         crm_notice("Unfencing %s: %s", node->details->uname, reason);