collectors: Improve log message to better describe errors.

Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/ofproto/collectors.c b/ofproto/collectors.c
index 919fa1b..4501d2b 100644 (file)
--- a/ofproto/collectors.c
+++ b/ofproto/collectors.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010, 2011, 2013 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2013, 2014 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -112,8 +112,10 @@ collectors_send(const struct collectors *c, const void *payload, size_t n)
         for (i = 0; i < c->n_fds; i++) {
             static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
             if (send(c->fds[i], payload, n, 0) == -1) {
-                VLOG_WARN_RL(&rl, "sending to collector failed: %s",
-                             ovs_strerror(errno));
+                char *s = describe_fd(c->fds[i]);
+                VLOG_WARN_RL(&rl, "%s: sending to collector failed (%s)",
+                             s, ovs_strerror(errno));
+                free(s);
             }
         }
     }