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>

diff --git a/src/kv/RocksDBStore.cc b/src/kv/RocksDBStore.cc
index e5aa6f106f0b35e5e66da9b75d7de68f56b74fad..0c62e1b70ae5a6e572432f2a25e35b5baac9959d 100644 (file)
--- a/src/kv/RocksDBStore.cc
+++ b/src/kv/RocksDBStore.cc
@@ -904,6 +904,7 @@ 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;