diff --git a/src/rootserver/freeze/ob_checksum_validator.cpp b/src/rootserver/freeze/ob_checksum_validator.cpp
index 40c82e824c..8ffe51945d 100755
--- a/src/rootserver/freeze/ob_checksum_validator.cpp
+++ b/src/rootserver/freeze/ob_checksum_validator.cpp
@@ -69,11 +69,11 @@ int ObChecksumValidator::set_basic_info(
     ret = OB_INVALID_ARGUMENT;
     LOG_WARN("invalid argument", KR(ret), K(frozen_scn), K(expected_epoch));
   } else if (FALSE_IT(compaction_scn_ = frozen_scn)) {
+  } else if (FALSE_IT(major_merge_start_us_ = ObTimeUtility::fast_current_time())) {
   } else if (OB_FAIL(set_need_validate())) { // init compaction_scn_ before call this func
     LOG_WARN("failed to set need_validate", K(ret), K_(tenant_id), K_(is_primary_service));
   } else {
     expected_epoch_ = expected_epoch;
-    major_merge_start_us_ = ObTimeUtility::fast_current_time();
     statistics_.reset();
   }
   return ret;
@@ -542,9 +542,11 @@ int ObChecksumValidator::check_tablet_checksum_sync_finish(const bool force_chec
     LOG_WARN("fail to check is first tablet in first ls exist", KR(ret), K_(tenant_id),  K_(compaction_scn));
   } else if (is_exist) {
     cross_cluster_ckm_sync_finish_ = true;
+  } else if (is_primary_service_) {
+    cross_cluster_ckm_sync_finish_ = false;
   } else {
     cross_cluster_ckm_sync_finish_ = check_waiting_tablet_checksum_timeout();
-    if (!is_primary_service_ && TC_REACH_TIME_INTERVAL(PRINT_CROSS_CLUSTER_LOG_INVERVAL)) {
+    if (TC_REACH_TIME_INTERVAL(PRINT_CROSS_CLUSTER_LOG_INVERVAL)) {
       LOG_WARN("can not check cross-cluster checksum now, please wait until first tablet"
              "in sys ls exists", K_(tenant_id),  K_(compaction_scn), K_(major_merge_start_us),
              "fast_current_time_us", ObTimeUtil::fast_current_time(), K(is_exist), K_(is_primary_service));
@@ -625,7 +627,11 @@ bool ObChecksumValidator::check_waiting_tablet_checksum_timeout() const
 {
 
   const int64_t total_wait_time_us = (ObTimeUtil::fast_current_time() - major_merge_start_us_);
-  return (total_wait_time_us > MAX_TABLET_CHECKSUM_WAIT_TIME_US);
+  const bool is_timeout = (total_wait_time_us > MAX_TABLET_CHECKSUM_WAIT_TIME_US);
+  if (is_timeout) {
+    LOG_WARN_RET(OB_TIMEOUT, "check waiting tablet checksum timeout", K_(major_merge_start_us), K(total_wait_time_us));
+  }
+  return is_timeout;
 }
 
 int ObChecksumValidator::try_update_tablet_checksum_items()