MDSMonitor: codify constraint for writeable OSDMap

Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
(cherry picked from commit 1a3457be4ef049b4b9d6a202455fbc21c09524b9)

diff --git a/src/mon/MDSMonitor.cc b/src/mon/MDSMonitor.cc
index ea341f2c96cdedda664dcf031d002c2d413a67be..c482c1c3c3a9a1542fe2f46bd513e4937b1a97fc 100644 (file)
--- a/src/mon/MDSMonitor.cc
+++ b/src/mon/MDSMonitor.cc
@@ -1096,6 +1096,8 @@ bool MDSMonitor::fail_mds_gid(FSMap &fsmap, mds_gid_t gid)
   const MDSMap::mds_info_t &info = fsmap.get_info_gid(gid);
   dout(1) << "fail_mds_gid " << gid << " mds." << info.name << " role " << info.rank << dendl;
 
+  ceph_assert(mon->osdmon()->is_writeable());
+
   epoch_t blacklist_epoch = 0;
   if (info.rank >= 0 && info.state != MDSMap::STATE_STANDBY_REPLAY) {
     utime_t until = ceph_clock_now();