[GitHub] [incubator-doris] caiconghui commented on a change in pull request #3051: Support sharding tablet_map_lock into more small map locks to make good performance for tablet manage task

[GitBox <gi...@apache.org>]

caiconghui commented on a change in pull request #3051: Support sharding tablet_map_lock into more small map locks to make good performance for tablet manage task
URL: https://github.com/apache/incubator-doris/pull/3051#discussion_r389253244
 
 

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 File path: be/src/olap/tablet_manager.cpp
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 @@ -172,24 +183,29 @@ OLAPStatus TabletManager::_add_tablet_to_map_unlocked(TTabletId tablet_id, Schem
     RETURN_NOT_OK_LOG(tablet->register_tablet_into_dir(), Substitute(
             "fail to register tablet into StorageEngine. data_dir=$0",
             tablet->data_dir()->path()));
-
-    _tablet_map[tablet_id].table_arr.push_back(tablet);
-    _tablet_map[tablet_id].table_arr.sort(_cmp_tablet_by_create_time);
-    _partition_tablet_map[tablet->partition_id()].insert(tablet->get_tablet_info());
+    tablet_map_t& tablet_map = _get_tablet_map(tablet_id);
+    tablet_map[tablet_id].table_arr.push_back(tablet);
+    tablet_map[tablet_id].table_arr.sort(_cmp_tablet_by_create_time);
+    {
+        ReadLock rlock(&_partition_tablet_map_lock);
+        _partition_tablet_map[tablet->partition_id()].insert(tablet->get_tablet_info());
 
 Review comment:
   here should be wlock， to protect _partition_tablet_map，_add_tablet_to_map_unlocked is that thread not obtained _tablet_map_lock

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