osd: an interval can't go readwrite if its acting is empty

Let's not forget that min_size can be zero.

Fixes: #4159
Signed-off-by: Sage Weil <sage@inktank.com>
(cherry picked from commit 4277265d99647c9fe950ba627e5d86234cfd70a9)

diff --git a/src/osd/osd_types.cc b/src/osd/osd_types.cc
index 56619f5a4fc10baa63747b234ead5649c95b4f8e..6709eb099767f900ec95cbdb185ef849ad3a1954 100644 (file)
--- a/src/osd/osd_types.cc
+++ b/src/osd/osd_types.cc
@@ -1579,7 +1579,8 @@ bool pg_interval_t::check_new_interval(
     i.acting = old_acting;
     i.up = old_up;
 
-    if (i.acting.size() >=
+    if (!i.acting.empty() &&
+       i.acting.size() >=
        osdmap->get_pools().find(pool_id)->second.min_size) {
       if (out)
        *out << "generate_past_intervals " << i