Fix: Ensure process is able to exit when history file import is ever used (#1369)

Author: yyuuttaaoo

core/event_handler/HistoryFileImporter.cpp

@@ -26,7 +26,7 @@ namespace logtail {
 
 HistoryFileImporter::HistoryFileImporter() {
     LOG_INFO(sLogger, ("HistoryFileImporter", "init"));
-    static auto _doNotQuitThread = CreateThread([this]() { Run(); });
+    mThread = CreateThread([this]() { Run(); });
 }
 
 void HistoryFileImporter::PushEvent(const HistoryFileEvent& event) {

core/event_handler/HistoryFileImporter.h

@@ -16,11 +16,11 @@
 
 #pragma once
 #include <string>
-#include <vector>
 #include <unordered_map>
 #include "common/StringTools.h"
 #include "common/CircularBuffer.h"
 #include "config/Config.h"
+#include "common/Thread.h"
 
 namespace logtail {
 
@@ -44,8 +44,8 @@ class HistoryFileImporter {
     HistoryFileImporter();
 
     static HistoryFileImporter* GetInstance() {
-        static HistoryFileImporter sFileImporter;
-        return &sFileImporter;
+        static HistoryFileImporter* sFileImporter = new HistoryFileImporter;
+        return sFileImporter;
     }
 
     void PushEvent(const HistoryFileEvent& event);
@@ -63,6 +63,7 @@ class HistoryFileImporter {
     CircularBufferSem<HistoryFileEvent, HISTORY_EVENT_MAX> mEventQueue;
     std::unordered_map<std::string, int64_t> mCheckPoints;
     FILE* mCheckPointPtr;
+    ThreadPtr mThread;
 };
 
 } // namespace logtail