diff --git a/core/src/db/DBImpl.cpp b/core/src/db/DBImpl.cpp
index 37a2b5f3e5c2b6bb80cdcf51f90e1c55064b04ee..bab1f83614ac3f104ec2fcb005fe0ad40ef7997c 100644
--- a/core/src/db/DBImpl.cpp
+++ b/core/src/db/DBImpl.cpp
@@ -664,9 +664,9 @@ DBImpl::Compact(const std::string& table_id) {
 
     ENGINE_LOG_DEBUG << "Before compacting, wait for build index thread to finish...";
 
-    WaitBuildIndexFinish();
+    // WaitBuildIndexFinish();
 
-    std::lock_guard<std::mutex> index_lock(index_result_mutex_);
+    const std::lock_guard<std::mutex> index_lock(build_index_mutex_);
     const std::lock_guard<std::mutex> merge_lock(flush_merge_compact_mutex_);
 
     ENGINE_LOG_DEBUG << "Compacting table: " << table_id;
diff --git a/core/src/scheduler/job/BuildIndexJob.cpp b/core/src/scheduler/job/BuildIndexJob.cpp
index 35af905a75ef56ca4259105ea01bfec4f78ff948..0da63214be29a98edc5e0a7709732a95622e3edc 100644
--- a/core/src/scheduler/job/BuildIndexJob.cpp
+++ b/core/src/scheduler/job/BuildIndexJob.cpp
@@ -10,10 +10,11 @@
 // or implied. See the License for the specific language governing permissions and limitations under the License.
 
 #include "scheduler/job/BuildIndexJob.h"
-#include "utils/Log.h"
 
 #include <utility>
 
+#include "utils/Log.h"
+
 namespace milvus {
 namespace scheduler {
 
@@ -34,7 +35,8 @@ BuildIndexJob::AddToIndexFiles(const engine::meta::TableFileSchemaPtr& to_index_
         return false;
     }
 
-    SERVER_LOG_DEBUG << "BuildIndexJob " << id() << " add to_index file: " << to_index_file->id_;
+    SERVER_LOG_DEBUG << "BuildIndexJob " << id() << " add to_index file: " << to_index_file->id_
+                     << ", location: " << to_index_file->location_;
 
     to_index_files_[to_index_file->id_] = to_index_file;
 }
diff --git a/core/src/scheduler/task/SearchTask.cpp b/core/src/scheduler/task/SearchTask.cpp
index 5e71b803e18215d0b0b97073cad44c2581f2bc3e..857965dd2dbaff2e760eb3c59ab8d25994e56b96 100644
--- a/core/src/scheduler/task/SearchTask.cpp
+++ b/core/src/scheduler/task/SearchTask.cpp
@@ -266,14 +266,19 @@ XSearchTask::Execute() {
 
             // step 3: pick up topk result
             auto spec_k = file_->row_count_ < topk ? file_->row_count_ : topk;
+            if (spec_k == 0) {
+                ENGINE_LOG_WARNING << "Searching in an empty file. file location = " << file_->location_;
+            }
 
             {
                 std::unique_lock<std::mutex> lock(search_job->mutex());
 
-                if (search_job->GetResultIds().front() == -1 && search_job->GetResultIds().size() > spec_k) {
-                    // initialized results set
-                    search_job->GetResultIds().resize(spec_k);
-                    search_job->GetResultDistances().resize(spec_k);
+                if (search_job->GetResultIds().size() > spec_k) {
+                    if (search_job->GetResultIds().front() == -1) {
+                        // initialized results set
+                        search_job->GetResultIds().resize(spec_k * nq);
+                        search_job->GetResultDistances().resize(spec_k * nq);
+                    }
                 }
 
                 XSearchTask::MergeTopkToResultSet(output_ids, output_distance, spec_k, nq, topk, ascending_reduce,