mon: MonitorDBStore: use get() on exists() instead of lower_bound()wip-4521

This works around an issue with leveldb.

Signed-off-by: Joao Eduardo Luis <joao.luis@inktank.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mon/MonitorDBStore.h b/src/mon/MonitorDBStore.h
index 100762423e3..9950ec87ca5 100644
--- a/src/mon/MonitorDBStore.h
+++ b/src/mon/MonitorDBStore.h
@@ -406,12 +406,18 @@ class MonitorDBStore
   }
 
   virtual bool exists(const string& prefix, const string& key) {
+    bufferlist bl;
+    int err = get(prefix, key, bl);
+    return err >= 0;
+
+    /*
     KeyValueDB::Iterator it = db->get_iterator(prefix);
     int err = it->lower_bound(key);
     if (err < 0)
       return false;
 
     return (it->valid() && it->key() == key);
+    */
   }
 
   virtual bool exists(const string& prefix, version_t ver) {