Fix follower update leader logic.

src/logservice/palf/log_state_mgr.cpp

@@ -739,9 +739,7 @@ bool LogStateMgr::follower_active_need_switch_()
   bool state_changed = false;
   common::ObAddr new_leader;
   if (need_update_leader_(new_leader)) {
-    if (new_leader.is_valid() || !leader_.is_valid() || leader_epoch_ == OB_INVALID_TIMESTAMP) {
-      state_changed = true;
-    }
+    state_changed = true;
   } else if (new_leader.is_valid()
              && self_ == new_leader) {
     state_changed = true;
@@ -1020,6 +1018,7 @@ int LogStateMgr::check_and_try_fetch_log_()
     } else {
       last_check_start_id_ = start_id;
       last_check_start_id_time_ns_ = now_ns;
+      PALF_LOG(TRACE, "sw try_fetch_log success", K(ret), K_(palf_id), K(start_id));
     }
   } else if (last_check_start_id_ != start_id) {
     last_check_start_id_ = start_id;

src/logservice/palf/palf_handle_impl.cpp

@@ -1948,6 +1948,7 @@ int PalfHandleImpl::set_location_cache_cb(PalfLocationCacheCb *lc_cb)
   int ret = OB_SUCCESS;
   if (IS_NOT_INIT) {
     ret = OB_NOT_INIT;
+    PALF_LOG(WARN, "not initted", KR(ret), KPC(this));
   } else if (OB_ISNULL(lc_cb)) {
     ret = OB_INVALID_ARGUMENT;
     PALF_LOG(WARN, "lc_cb is NULL, can't register", KR(ret), KPC(this));
@@ -2288,7 +2289,7 @@ int PalfHandleImpl::do_init_mem_(
     has_set_deleted_ = false;
     palf_env_impl_ = palf_env_impl;
     is_inited_ = true;
-    PALF_LOG(INFO, "PalfHandleImpl do_init_ success", K(ret), K(palf_id), K(log_dir), K(palf_base_info),
+    PALF_LOG(INFO, "PalfHandleImpl do_init_ success", K(ret), K(palf_id), K(self), K(log_dir), K(palf_base_info),
         K(log_meta), K(fetch_log_engine), K(alloc_mgr), K(log_rpc), K(log_io_worker));
   }
   if (OB_FAIL(ret)) {

src/logservice/palf_handle_guard.h

@@ -224,6 +224,7 @@ public:
   DELEGATE_WITH_RET(palf_handle_, switch_learner_to_acceptor, int);
   DELEGATE_WITH_RET(palf_handle_, switch_acceptor_to_learner, int);
   DELEGATE_WITH_RET(palf_handle_, set_region, int);
+  DELEGATE_WITH_RET(palf_handle_, set_location_cache_cb, int);
   DELEGATE_WITH_RET(palf_handle_, change_access_mode, int);
   DELEGATE_WITH_RET(palf_handle_, get_access_mode, int);
 private: