kv/RocksDBStore: enrich debug message

It's better to print why ListColumnFamilies() failed.

Signed-off-by: Toshikuni Fukaya <toshiq2@gmail.com>
Signed-off-by: Satoru Takeuchi <satoru.takeuchi@gmail.com>
(cherry picked from commit 25757d28cfd7a7759603d86db3b5539d7c35f50c)

diff --git a/src/kv/RocksDBStore.cc b/src/kv/RocksDBStore.cc
index b7fa258638f41705bc3bb55d0a5104dc337b51b9..54ba0bd2712d767cb8f3d2eb69ec57d2c5b4183b 100644 (file)
--- a/src/kv/RocksDBStore.cc
+++ b/src/kv/RocksDBStore.cc
@@ -908,6 +908,7 @@ int RocksDBStore::verify_sharding(const rocksdb::Options& opt,
   status = rocksdb::DB::ListColumnFamilies(rocksdb::DBOptions(opt),
                                           path, &rocksdb_cfs);
   if (!status.ok()) {
+    derr << __func__ << " unable to list column families: " << status.ToString() << dendl;
     return -EIO;
   }
   dout(5) << __func__ << " column families from rocksdb: " << rocksdb_cfs << dendl;