From 5464b0b4c2d7dc1c89fdf357dfc088ab5fd8d509 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@newdream.net>
Date: Thu, 25 Feb 2010 11:48:35 -0800
Subject: [PATCH] mds: if we have no subtrees on rejoin_done, leave cluster

---
 src/mds/MDS.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/mds/MDS.cc b/src/mds/MDS.cc
index 7e84f11c476d7..1901214085204 100644
--- a/src/mds/MDS.cc
+++ b/src/mds/MDS.cc
@@ -1057,6 +1057,13 @@ void MDS::rejoin_done()
   mdcache->show_subtrees();
   mdcache->show_cache();
 
+  // funny case: is our cache empty?  no subtrees?
+  if (!mdcache->is_subtrees()) {
+    dout(1) << " empty cache, no subtrees, leaving cluster" << dendl;
+    request_state(MDSMap::STATE_STOPPED);
+    return;
+  }
+
   if (replay_queue.empty())
     request_state(MDSMap::STATE_ACTIVE);
   else
-- 
2.39.5