From: Michael Hanselmann <hansmi@google.com>
Date: Mon, 10 Dec 2012 13:34:15 +0000 (+0100)
Subject: Improve error message for when adding inotify watcher fails
X-Git-Tag: v2.7.0beta1~367
X-Git-Url: https://code.grnet.gr/git/ganeti-local/commitdiff_plain/7fb5ac7cd87fa4916b6c4813dcf3a10ad4b89d96?hp=6bee863caf08e334346b9910f2c97e4424fcaf16

Improve error message for when adding inotify watcher fails

Explicitely mention the fs.inotify.max_user_watches sysctl value.

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>
---

diff --git a/lib/asyncnotifier.py b/lib/asyncnotifier.py
index 37a2fcb..f4b0815 100644
--- a/lib/asyncnotifier.py
+++ b/lib/asyncnotifier.py
@@ -109,7 +109,9 @@ class FileEventHandlerBase(pyinotify.ProcessEvent):
 
     ret = result.get(filename, -1)
     if ret <= 0:
-      raise errors.InotifyError("Could not add inotify watcher (%s)" % ret)
+      raise errors.InotifyError("Could not add inotify watcher (error code %s);"
+                                " increasing fs.inotify.max_user_watches sysctl"
+                                " might be necessary" % ret)
 
     return result[filename]