update

Signed-off-by: NZhiru Zhu <zzhu@fandm.edu>

CHANGELOG.md

@@ -57,6 +57,7 @@ Please mark all change in change log and use the issue from GitHub
 -   \#1577 Row count incorrect if delete vectors then create index
 -   \#1580 Old segment folder not removed after merge/compact if create_index is called before adding data
 -   \#1590 Server down caused by failure to write file during concurrent mixed operations
+-   \#1598 Server down during mixed operations
 
 ## Feature
 -   \#216 Add CLI to get server info

core/src/scheduler/task/SearchTask.cpp

@@ -264,13 +264,16 @@ XSearchTask::Execute() {
 
             // step 3: pick up topk result
             auto spec_k = file_->row_count_ < topk ? file_->row_count_ : topk;
-            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);
-            }
+
             {
                 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);
+                }
+
                 XSearchTask::MergeTopkToResultSet(output_ids, output_distance, spec_k, nq, topk, ascending_reduce,
                                                   search_job->GetResultIds(), search_job->GetResultDistances());
             }