Merge pull request ceph#44408 from linuxbox2/wip-rgwlc-warn-attr

rgwlc:  warn on missing RGW_ATTR_LC

Reviewed-by: Daniel Gryniewicz <[email protected]>
Reviewed-by: J. Eric Ivancich <[email protected]>

Author: cbodley

src/rgw/rgw_lc.cc

@@ -1749,9 +1749,14 @@ int RGWLC::bucket_lc_process(string& shard_id, LCWorker* worker,
     return -ENOENT;
   }
 
-  map<string, bufferlist>::iterator aiter = bucket->get_attrs().find(RGW_ATTR_LC);
-  if (aiter == bucket->get_attrs().end())
+  map<string, bufferlist>::iterator aiter
+    = bucket->get_attrs().find(RGW_ATTR_LC);
+  if (aiter == bucket->get_attrs().end()) {
+    ldpp_dout(this, 0) << "WARNING: bucket_attrs.find(RGW_ATTR_LC) failed for "
+		       << bucket_name << " (terminates bucket_lc_process(...))"
+		       << dendl;
     return 0;
+  }
 
   bufferlist::const_iterator iter{&aiter->second};
   try {