print tg_ids with tg thread leak

deps/oblib/src/lib/hash/ob_hashset.h

@@ -206,6 +206,12 @@ public:
   {
     return ht_.deserialization(archive, &allocer_);
   }
+
+  template<class _callback>
+  int foreach_refactored(_callback &callback) const
+  {
+    return ht_.foreach_refactored(callback);
+  }
 private:
   _allocer allocer_;
   _bucket_allocer bucket_allocer_;

src/share/rc/ob_tenant_base.cpp

@@ -238,7 +238,11 @@ void ObTenantBase::destroy()
 {
   destroy_mtl_module();
   if (tg_set_.size() > 0) {
-    LOG_ERROR_RET(OB_ERR_UNEXPECTED, "tg thread not execute tg_destory make tg_id leak", K(tg_set_.size()), K(tg_set_));
+    TGSetDumpFunc tg_set_dump_func;
+    tg_set_.foreach_refactored(tg_set_dump_func);
+    _OB_LOG_RET(ERROR, OB_ERR_UNEXPECTED,
+                "tg thread not execute tg_destory make tg_id leak, tg_size=%ld, tg_set=[%s]",
+                tg_set_.size(), tg_set_dump_func.buf_);
   }
   tg_set_.destroy();
   thread_dynamic_factor_map_.destroy();

src/share/rc/ob_tenant_base.h

@@ -406,6 +406,21 @@ friend class ObTenantSpaceFetcher;
 friend class omt::ObTenant;
 friend class ObTenantEnv;
 
+struct TGSetDumpFunc
+{
+  static const int64_t BUF_LEN = 128;
+  TGSetDumpFunc() : pos_(0)
+  {
+    MEMSET(buf_, '\0', BUF_LEN);
+  }
+  virtual ~TGSetDumpFunc() = default;
+  int operator()(common::hash::HashSetTypes<int64_t>::pair_type &kv)
+  {
+    return databuff_printf(buf_, BUF_LEN, pos_, " %ld", kv.first);
+  }
+  int64_t pos_;
+  char buf_[BUF_LEN];
+};
 template<class T> struct Identity {};
 
 public: