diff --git a/db/log_and_apply_bench.cc b/db/log_and_apply_bench.cc
index dbb459c30..a5aa95017 100644
--- a/db/log_and_apply_bench.cc
+++ b/db/log_and_apply_bench.cc
@@ -42,6 +42,11 @@ void BM_LogAndApply(int iters, int num_base_files) {
 
     Options options;
     EnvOptions sopt;
+    // Notice we are using the default options not through SanitizeOptions().
+    // We might want to initialize some options manually if needed.
+    options.db_paths.emplace_back(dbname, 0);
+    // The parameter of table cache is passed in as null, so any file I/O
+    // operation is likely to fail.
     vset = new VersionSet(dbname, &options, sopt, nullptr);
     std::vector<ColumnFamilyDescriptor> dummy;
     dummy.push_back(ColumnFamilyDescriptor());
diff --git a/util/ldb_cmd.cc b/util/ldb_cmd.cc
index 8b92820de..b6e108ccc 100644
--- a/util/ldb_cmd.cc
+++ b/util/ldb_cmd.cc
@@ -556,6 +556,10 @@ void ManifestDumpCommand::DoCommand() {
   std::shared_ptr<Cache> tc(NewLRUCache(
       options.max_open_files - 10, options.table_cache_numshardbits,
       options.table_cache_remove_scan_count_limit));
+  // Notice we are using the default options not through SanitizeOptions(),
+  // if VersionSet::DumpManifest() depends on any option done by
+  // SanitizeOptions(), we need to initialize it manually.
+  options.db_paths.emplace_back("dummy", 0);
   VersionSet* versions = new VersionSet(dbname, &options, sopt, tc.get());
   Status s = versions->DumpManifest(options, file, verbose_, is_key_hex_);
   if (!s.ok()) {